Outstanding EUROPT Conference in Linz, Austria

I am writing this blogpost from Vienna, Austria, where I will soon be registering for the IFORS Conference.

This summer, as is my tradition, I enjoy speaking at conferences, and especially those in Europe.

The travel began on June 26, 2026, when I flew to Naples via Amsterdam to take part in the SING 21 Game Theory Conference, where I delivered the opening keynote on the following Monday morning. The conference was a joy, despite the heat, and I blogged about it: http://annanagurney.blogspot.com/2026/07/i-enjoyed-giving-keynote-at-game-theory.html

Then, last week, I spoke at the EUROPT Conference in Linz, Austria. Linz is the third biggest city in Austria, and it is quite industrial. It was my first time there. Below is a photo of the view from our hotel, which overlooked a nice courtyard.

The EUROPT Conference took place at the Johannes Kepler University, which has a beautiful, green campus, complete with a pond, that reminded me a bit of the UMass Amherst pond.

Many thanks to the organizers of the EUROPT 2026 Conference in Linz, Austria. It was an excellent conference, with great scientific presentations and discussions. Information on the conference can be found here: https://www.jku.at/en/institute-of-business-analytics-and-technology-transformation/conference-europt-2026/. It was wonderful to see Professors: Steven Gabriel of the US, Mauro Passacantando of Italy, Tamás Terlaky of the US, Gerhard-Wilhelm Weber of Poland, Bissan Ghaddar of Canada, Miguel Lejeune of the US, Oleg Prokopyev (now of Switzerland), Immanuel Bomze of Austria, and many others and to make new friends from Georgia (the country), Sweden, Brazil, Canada, and Hong Kong. The link to the slidedeck of my presentation on Ad Valorem Tariffs in Global Supply Chain Networks and Impacts on Labor, based on a recently co-authored published paper with my Isenberg School of Management, UMass Amherst PhD student Samira Samadi:  https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2592758 is here: https://supernet.isenberg.umass.edu/visuals/EUROPT-2026.pdf

The 4 hour conference banquet in a beer hall in an indoor courtyard with a heavenly dessert of warm chocolate cake, cherries, and sorbet, we will all remember!

And, at the Linz train station yesterday, we saw Professor Tamas Terlaky, who was also heading to the IFORS Conference - https://www.ifors2026.at/home/

My PhD Students Had a Great Year So We Celebrated

One of the great pleasures of being at a research university is working with PhD students and also celebrating their accomplishments. Yesterday, we celebrated some of the accomplishments of my Isenberg School of Management Operations Management PhD students over this past year with a delicious lunch at The Commonwealth Restaurant at the University of Massachusetts Amherst.

Highlights of an excellent academic year have included:

• Dana Hassani receiving the 2026 Isenberg School Outstanding Doctoral Student Teacher Award;
• Ismael Pour successfully teaching a full course, for the first time, and publishing the co-authored paper, "Integrated crop and cargo war risk insurance: application to Ukraine," co-authored with Professor Borys Kormych of Ukraine, and me, in the International Transactions in Operational Research: https://onlinelibrary.wiley.com/doi/10.1111/itor.70038
• Samira Samadi publishing the paper, "Fresh produce spatial price equilibrium on general networks: Capturing commodity quality deterioration through endogenous transportation time delay functions with capacities," with Professor Deniz Besik and me in the European Journal of Operational Research: https://www.sciencedirect.com/science/article/pii/S0377221726003759 and also the paper with me, "Ad valorem tariffs in global supply chain networks and impacts on labor," in the Journal of the Operational Research Society: https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2592758. In addition, Samira successfully taught a full course for the first time plus she served as the President of the UMass Amherst INFORMS Student Chapter!

These PhD students were also very active in presenting their research at conferences of the professional societies: INFORMS, POMS, and DSI. And, Sarvagya Jha had a terrific first year as a PhD student and recently submitted his first paper to a journal. We shared the five exquisite desserts in the photo below.

Wishing all PhD students and their faculty a fabulous and productive summer with great, impactful research.

Super Excited to be Presenting at International Conferences this Summer

Conferences are outstanding venues at which to exchange latest research results and ideas, to do networking, and to reconnect with colleagues from around the globe. And, when the conferences are located in beautiful locations, the experiences become even more special and worthwhile.

This summer will be a very busy one. I will soon be presenting 4 talks at 3 different conferences in 2 different countries.

My first talk is the opening keynote talk at the Game Theory Sing21 Conference in Naples, Italy. I am very grateful to Professor Annamaria Barbagallo for the invitation. The title of my keynote is: "Game Theory, Supply Chains, Labor, and Tariffs: Insights from Variational Inequalities."

The program for the conference is now available online: https://sites.google.com/view/sing-21/programme_1/scientific-programme

I will then travel to Linz, Austria to speak at the EUROPT Conference: https://www.jku.at/en/institute-of-business-analytics-and-technology-transformation/conference-europt-2026/ At that conference, I will present a paper that was co-authored with my Isenberg School PhD student, Samira Samadi, which was recently published in the Journal of the Operational Research Society (JORS). The paper, entitled, "Ad Valorem Tariffs in Global Supply Chain Networks and Impacts on Labor," can be accessed from the journal website: https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2592758

The IFORS Conferences, which take place only every three years are some of my favorites! IFORS is the umbrella organization for national Operations Research Societies, including INFORMS. And, since the 2026 conference will take place in Vienna, it is one not to be missed. I love Austria and had a Fulbright at SOWI in Innsbruck, Austria. My family and I very much enjoyed living in Austria.

It will be an easy journey from Linz to Vienna.

Working on the two presentations for IFORS was very enjoyable. I would like to take the opportunity to thank Professor Gerhard-Wilhelm Weber for inviting me to speak in the stream: Moments in the History (and Future) of OR. Preparing my presentation, "Highlighting Some Historical Women in OR," took me on a very nostalgic journey since I was blessed to have known some of the truly remarkable female OR pioneers. And my other presentation at this conference is on a paper co-authored with two females: Samira Samadi and Professor Deniz Besik (who was my former PhD student at the Isenberg School): "Fresh Produce Spatial Price Equilibrium on General Networks: Capturing Commodity Quality Deterioration Through Endogenous Transportation Time Delay Functions with Capacities," which was recently published in the European Journal of Operational Research:  https://www.sciencedirect.com/science/article/abs/pii/S0377221726003759. Of course, in the former presentation, I will highlight the new initiative of  IFORS: GLOW - Global Leadership of Women in Operational Research! 

More information on the IFORS conference can be found on its website: https://www.ifors2026.at/home/

Safe travels, everyone!

I Thoroughly Enjoyed Speaking on Trade Wars and Game Theory at the Great INFORMS Analytics Conference

Conferences can be deeply engaging and energizing and the recent INFORMS Analytics Conference at the Gaylord National Resort and Convention Center set new standards https://meetings.informs.org/wordpress/analytics/! Many thanks to all those who helped to make this conference a great success!

I love the serendipity of great conferences from the meeting of new colleagues to seeing friends that you did not even realize would be attending! 

There were over 500 attendees and about 60 one hour presentations. I was honored and delighted to be able speak on Trade Wars and Game Theory. Who Wins, Who Loses? The audience was terrific with many excellent, thoughtful questions. And, as promised, I have now posted the slide deck from my presentation: https://supernet.isenberg.umass.edu/visuals/Analytics-Nagurney-2026.pdf

I very much enjoyed many of the Edelman Award presentations of the finalists and the networking events. The food was also delicious and the venue was stunning! Engagement of academics with practitioners is critically important and, after I returned, I shared some of the many highlights with the students in my class at the Isenberg School of Management.

Thrilled that Our Paper on Tariffs and Effects on Labor in Supply Chains is Published Free Access in JORS!

My Isenberg School of Management PhD student, Samira Samadi, and I are thrilled that our paper on ad valorem tariffs and their effects on labor in competitive supply chains is now published in the Journal of Operational Research (JORS). JORS is the flagship journal of the Operational Research Society, which is based in the United Kingdom.

The paper is titled, "Ad Valorem Tariffs in Global Supply Chain Networks and Impacts on Labor." The model is a game theory one of firms competing in an oligopolistic manner, each one seeking to maximize its profits, in the presence of tariffs. The firms seek to determine the optimal production of commodities and their distribution as well as the labor needed, with wages and productivity of labor included.

Illustrative examples are provided along with a global soybean trade case study. Numerical results reveal how such tariffs shift trade flows, reshape labor allocation, and affect demand prices as well as profits, with labor shortages and cost disruptions further negatively compounding the effects.

The Editor in Chief, (EIC) of JORS, Kostas Nikolopoulos of Durham University, has kindly made the paper free access and the link to it is below: https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2592758

With tariffs having wide impacts, both locally and globally, this is one of the very first papers to quantify the effects on labor, trade flows, and profits. We thank the EIC for the expert handling of our paper as well as the anonymous reviewers who provided valuable feedback on the original paper.

Thrilled to Receive the Galleys for Our Tariffs, Rerouting, and Supply Chain Paper for the Rockafellar Volume

It has been a very busy "winter break" with the revising of a 50 page paper with collaborators, the reviewing of multiple journal articles, and also the handling of papers submitted to journals as an Associate Editor. And, of course, the holiday season, with the accompanying festivities also needed attention! Plus, I have also been busy updating my lectures for two classes that I will be teaching this spring at the Isenberg School of Management.

I was delighted to receive from the publisher Springer galleys for the paper, "Multicommodity Trade, Tariffs, and Rerouting," which is in press as a chapter for a very special edited volume in honor of Tyrrell "Terry" Rockafellar on the occasion of his 90th birthday! The volume is titled, "Convex and Variational Analysis with Applications." The volume is edited by Professors Rassias and Pardalos and was originally scheduled for publication in mid December 2025 but now the publication date on the Springer page is March 16, 2026: https://link.springer.com/book/9783032078599.

The paper, which I co-authored with my Isenberg School of Management PhD student, Samirasadat "Samira" Samadi, will be chapter 16 in this special volume.

The galleys (I was delighted) were in great shape and no changes were needed!

Thanks to the typesetters for their outstanding work. We are very much looking forward to the publication of this volume, which I am hearing will have 27 chapters.

Honored to Be Named a Fellow of The OR Society

The official good news arrived a few weeks ago and, this past week, I received the certificate.

I am humbled and thrilled to have been named a Fellow of the Operational Research (OR) Society,  which is based in the United Kingdom.

It has been quite an amazing year, thanks to both The OR Society and to another professional society that I am a member (long-time one) of - that of INFORMS.

On December 5, 2024, I delivered the Blackett Lecture at The Royal Society in London, thanks to The OR Society, and blogged about the magical experience here: https://annanagurney.blogspot.com/2024/12/an-incredible-blackett-lecture.html

Below is a collage of photos to capture this truly memorable experience:

An article that I wrote about my  Blackett Lecture was published (and is feely accessible this year) in The OR Society flagship journal The Journal of the Operational Research Society (JORS): https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2494706

And, just this past week, on the day before Thanksgiving, an article that I wrote with my Isenberg School of Management PhD student, Samirasadat Samadi, on tariffs, supply chain networks, and labor was published in JORS: https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2592758

I am so grateful to outstanding professional societies for providing us with communities and support.

Thank you to The Or Society Fellows Committee, its Board, and to those who wrote letters of support for me!

Many thanks also to INFORMS for recognizing my work (and thanks to my students and collaborators) with the 2025 President's Award: https://www.informs.org/News-Room/INFORMS-Releases/Awards-Releases/Anna-Nagurney-Honored-with-2025-INFORMS-President-s-Award

Our work continues.

Our Paper on Tariffs and Labor in Global Supply Chain Networks is Accepted!

We are delighted to report that there is an update on the paper in this post. Today, on the day before Thanksgiving, it was published on the journal website: https://www.tandfonline.com/doi/full/10.1080/01605682.2025.2592758?src=

There are two streams of research that I have been heavily engaged in and they are the impacts of tariffs on both producers and consumers plus the integration of labor into supply chain networks and I have even published a book on the subject: Labor and Supply Chain Networks: 

https://supernet.isenberg.umass.edu/bookser/Labor-book.html

I have been working with my PhD student, Samira Samadi, on investigating impacts of tariffs on labor, including employment, and integrating the two streams of research.

I am delighted that, this past week, we heard from the Editor in Chief (EIC) of the Journal of the Operational Research Society (JORS), Professor Kostas Nikolopoulos of the Durham University Business School in the United Kingdom, that our paper, "Ad Valorem Tariffs in Global Supply Chain Networks and Impacts on Labor," has been accepted in this outstanding journal.

The journal now requires both an abstract and a practitioner abstract and both are below.

We very much enjoyed researching and writing this paper, which also includes a case study on soybeans, and investigates quantitatively the impacts of tariffs on major countries affected, including China and the US. The mathematical model is that of a competitive global supply chain network under oligopolistic competition and the tariffs are ad valorem ones, which are now widely applied to many products, including commodities. 

A preprint of the paper can be found on the Supernetwork Center website: https://supernet.isenberg.umass.edu/articles/TariffsandLaborinGlobalSupplyChainNetworks.pdf

We are grateful to the EIC, the Associate Editors, and to the two anonymous reviewers for the professional handling of our paper and their constructive comments and suggestions.

Slide Decks of Our Talks at INFORMS in Atlanta Are Now Posted on Topics from War Risk Insurance to Tariffs and Rerouting to Remembering the Great Hani Mahmassani

My immediate research group had five presentations at the recent INFORMS Conference, which took place in Atlanta, October 26-29, 2025.

I am delighted that the slide decks of all the above presentations have now been posted on the Virtual Center for Supernetworks website: https://supernet.isenberg.umass.edu/visuals.html.

Below is a photo of the speakers and the organizers (thanks to Himadri Sen Gupta and Andrés González for the invitation) of the Resilient Networks session in which Ismael Pour, my PhD student, presented our paper on integrated crop and cargo war risk insurance with applications to Ukraine. This paper we co-authored with Borys Kormych of the Odesa Law Academy and it was published in the International Transactions in Operational Research and is available free access: https://onlinelibrary.wiley.com/doi/10.1111/itor.70038?af=R

My PhD student, Samira Samadi, presented two papers (since I had to speak on a panel memorializing Hani Mahmassani, who passed away on July 15, 2025).

Samira's first paper presentation, which was on fresh produce quality deterioration under transportation congestion and disruptions, was on work we did with Deniz Besik of the University of Richmond. Her second paper, which we co-authored, was on tariffs and rerouting, and is in press in a volume in honor of Terry Rockafellar's 90th birthday: https://link.springer.com/book/9783032078599.

Dana Hassani delivered a paper of ours in the 8AM session on the last day of the conference. The paper, with Oleg Nivievskyi and Pavlo Martyshev of the Kyiv School of Economics (KSE), was published in an edited Dynamics of Disasters volume by Springer last December: https://www.springerprofessional.de/en/quantification-of-international-trade-network-performance-under-/50390576

I will blog about the panel in honor of Hani Mahmassani in a separate post but below I share a photo of the entire group that took part. Thanks to Karen Smilowitz and to the Transportation Science and Logistics (TSL) Society of INFORMS for allowing us to memorialize Hani in a session originally scheduled for the Robert Herman Lifetime Achievement Award recipient, who could not make it (Cynthia Barnhart of MIT was recognized this year). Hani was an earlier recipient of this award.

 

Looking Forward to the 2025 INFORMS Conference in Atlanta!

All five presentations are now done! The 2025 INFORMS  conference will definitely be a whirlwind conference. It will take place October 26 -29, 2025. I am so looking forward to the talks, the social events, serendipitous encounters, the exhibits, and the various business meetings and special luncheons.

Detailed information on the conference is available here:https://meetings.informs.org/wordpress/annual/

Three of my PhD students will be coming - Ismael Pour, Samira Samadi, and Dana Hassani. 

Ismael will present our latest paper on integrated crop and cargo war risk insurance, co-authored with Borys Kormych of the Odesa Law Academy, which was recently published in the January 2026 issue of the International Transaction in Operational Research, and is available free access: 

https://onlinelibrary.wiley.com/doi/10.1111/itor.70038?af=R. 

I will speak on the panel in honor of Hani Mahmassani, who passed away on July 15, 2025. The panel is chaired by Karen Smilowitz, the Editor of Transportation Science and fellow panelists are: Srinivas Peeta, Michael Hyland, and Marco Nie. The panel will be a moving tribute to a leading scholar, educator, mentor, and friend, who is deeply missed.

Samira will present two of our papers (because my schedule is loaded with many meetings and conference events) - a paper, co-authored with Deniz Besik of the University of Richmond on a continuing passion of ours - impact on fresh produce quality of various supply chain disruptions - and the  paper, "Multicommodity Trade, Tariffs, and Rerouting," that is forthcoming in a very special edited volume: Convex and Variational Analysis with Applications: In Honor of Terry Rockafellar’s 90th Birthday, with Themistocles M. Rassias and Panos M. Pardalos as Editors, Springer Nature Switzerland AG; see: https://link.springer.com/book/9783032078599

Dana will present a paper of ours that was also recently published: "Quantification of International Trade Network Performance Under Disruptions to Supply, Transportation, and Demand Capacity, and Exchange Rates in Disasters." This paper was co-authored with colleagues at the Kyiv School of Economics (KSE): Oleg Nivievskyi and Pavlo Martyshev and appears in: Dynamics of Disasters- From Natural Phenomena to Human Activity, Ilias S. Kotsireas, Anna Nagurney, Panos M. Pardalos, Stephan Pickl, Chrysafis Vogiatzis, Editors, Springer Nature Switzerland AG; see:https://link.springer.com/book/10.1007/978-3-031-74006-0#toc

And on the first evening of the conference, I will receive the INFORMS President's Award, for which I am deeply grateful and very honored:  https://www.informs.org/News-Room/INFORMS-Releases/Awards-Releases/Anna-Nagurney-Honored-with-2025-INFORMS-President-s-Award

Supply Chain Vulnerabilities and the Need for Diversification - Thanks to The Democracy Forum for the Invitation to Serve as a Panelist!

The invitation arrived a few weeks ago from Lord Charles Bruce, the President of The Democracy Forum. The panel webinar on "Supply Chain Vulnerabilities and the Need for Diversification," was to take place on July 29, 2025. I had mentioned that I would be traveling then. In fact, I would be on a short vacation in Ogunquit, Maine, but I could take part and join from my hotel. 

I am pleased that, yesterday, the panel took place and the Internet held up. It was a fascinating event and I wish that we had had more time than the scheduled hour. Lord Bruce did an excellent introduction to some of the pressing issues facing supply chains in this era and Humphrey Hawksley was an outstanding moderator. The full video of our panel is now posted on YouTube: https://www.youtube.com/watch?v=oyqPiPTGqjg

Thanks also to the audience for the engagement and their questions! I have already received some direct feedback.

I have been working on supply chains for over 20 years and have published multiple books on the topic as well as journal articles, many of which, more recently, focus on tariffs and other policy interventions, as well as geopolitical issues, including wars and strife, and their impacts on supply chains.

In my panel presentation, I emphasized supply chains as "networks" of suppliers, manufacturers, freight service providers, warehouse operators and, of course, consumers interacting as the resources are transformed into finished products and flow from origin points to the destinations, with consumers responding to prices, quality, etc. Such networks can be local or global in nature and are underpinned by such physical networks as transportation networks (roads, rails, rivers, oceans, air, etc.) as well as telecommunication networks and, of course, energy networks that provide the power. Workers (labour) are essential to each link in a supply chain network,  as became vividly apparent at the height of the pandemic with labor availability as well as productivity suffering.  Products in all sectors, including such critical ones as: agriculture and food processing, high tech, healthcare, automobiles, and construction rely on supply chains.

Mapping out supply chains allows for the visualization of the different tiers, their structure and complexity, and redundancies (or absence thereof), and  enables the identification of possible vulnerabilities. Challenges facing the management of supply chain networks now are numerous and include the negative effects of climate change (fires, floods, droughts, landslides)  and geopolitical risk due to violence and strife and wars.  Further stressing  supply chains and their management are tariffs and on-going trade wars, pushing decision-makers to act under great uncertainty.

Diversification is common in finance as in portfolio optimization as a means of reducing risk. Diversification in terms of supply chains  can involve having multiple suppliers, multiple manufacturing plants in different regions, and even using different routes for the shipments of goods. Diversification can reduce risk, increase resilience, and enhance flexibility and agility so that customers' needs are satisfied, while other stakeholders in supply chains optimize as closely as possible their objectives, which can include profit-maximization, and even the reduction of environmental impacts. It is important to consider "just-in-case" scenarios and to plan and mitigate accordingly. Supply chains are essential to our societies and economies and ensuring that they continue to function efficiently and cost-effectively supports the well-being of our communities.

I wish that we had had more time because the presentations were very informative and, I believe, that they will actually germinate new research.  My fellow panelists were: Manmohan Sodhi of Bayes Business School; Ruth Dearnley OBE of STOP THE TRAFFIK, and Mark Goh of National University of Singapore.

Thanks, again, to Lord Bruce and to Humphrey Hawksley for organizing this very timely panel and for posting the video recording for others to learn from and to enjoy.

I am certain that supply chains will continue to generate much interest because of their importance to all of us!

Outstanding Making an Impact Lightning Talks: Honored to Speak on Tariffs, Trade, and OR

This post is the third in a series on the EURO Conference, which took place in Leeds, UK, June 22-25, 2025.

I was honored and delighted to have been invited by Ruth Kaufman to deliver a lighting talk in the Making an Impact session on Monday morning, June 23, of the conference at 8:30AM. All 13 speakers, from several different continents, showed up. The full list of speakers, their presentation titles, and abstracts can be found here: https://euro2025leeds.uk/making-an-impact/. The breadth of topics was fantastic and included algorithms for fighting crime, reducing food waste on airplane flights, and emergency ambulance service planning. 

My presentation was on Tariffs, Trade, and OR.

This session was a truly outstanding beginning to this scientific conference.

Below is photo of the speakers with Ruth Kaufman and Jane Parkin, followed by a photo of the audience.

I have been publishing on tariffs (of different types) for quite a few years now, so I very much enjoyed preparing and delivering my presentation, which is now posted on the Supernetwork Center website: https://supernet.isenberg.umass.edu/visuals/EURO2025_MakinganImpact-Tariffs,%20Trade,%20and%20OR.pdf

Making an Impact - All Set with 3 Talks for the EURO Conference in Leeds, UK!

In a few days, I head to the UK. I am very excited about the EURO conference at the University of Leeds https://euro2025leeds.uk/, at which I will have 3 invited presentations. My talks are all prepared. This conference marks 50 years of the professional society of EURO, so it will be a very celebratory conference.

The Making an Impact stream, which is the practitioners' stream at the EURO conferences, is always a favorite of mine. I'm thrilled that, at this conference, I'll present on: Tariffs, Trade, and OR: Impacts on Producers, Consumers, and Labor in the Making an Impact: 'OR in Action Lightning Talks' session. Thanks to Ruth Kaufman for organizing this session, which will be the first one of the conference. I last saw Ruth at my Blackett Lecture, which I delivered at The Royal Society in London on December 5, 2024. 

And, in the session immediately following, I'll deliver the presentation, "Integrated Crop and Cargo War Risk Insurance: Application to Ukraine," which is based on a paper I co-authored with my Isenberg School of Management, UMass Amherst PhD student Ismael M. Pour and Professor Borys Kormych of Odesa. The paper was recently published in the International Journal of Operational Research: https://lnkd.in/ewmXR8kU. 

Many thanks also to Professors Gerhard-Wilhelm Weber and Roberto Rossi for inviting me to speak in the session: Celebrating 50 Years of EURO on "Reflections on Wonderful OR Experiences at EURO Conferences Over 20 Years." In that presentation slide deck I have many photos of conferees at EURO conferences in Reykjavik, Poznan, Dublin, and other locations.  I am very much looking forward to the outstanding scientific presentations and social gatherings and to building new memories.

Rerouting to Evade Tariffs - Our Latest Study

Tariffs and their impacts we have been researching for several decades now because of the relevance of the topic as well as the scientific interest in the mathematical modeling of supply chain networks and international trade. Furthermore, there are different types of tariffs, including unit tariffs, ad valorem tariffs, and even tariff rate quotas. We have studied the impacts of tariffs in perfectly competitive contexts such as spatial price equilibrium problems as well as in oligopolistic markets.

Recently, because of the escalating trade wars and imposition of various retaliatory tariffs in the second Trump administration, our research has included rerouting to evade tariffs. This topic has been quite newsworthy; see, for example, this article in The New York Times, which was published today: https://www.nytimes.com/2025/05/24/business/vietnam-china-transshipment.html

My paper, "Multicommodity Trade, Tariffs, and Rerouting," co-authored with my Isenberg School PhD student, Samirasadat "Samira" Samadi, was accepted in the very special volume: Convex and Variational Analysis with Applications: In Honor of Terry Rockafellar’s 90th Birthday. Panos M. Pardalos and Themistocles M. Rassias, Editors, Springer Nature Switzerland AG.

It was an honor to have been invited to contributed to this edited volume in honor of the amazing Professor Rockafellar, a giant in the optimization and variational inequalities.

A preprint of our paper can be downloaded from the Supernetwork Center website: https://supernet.isenberg.umass.edu/articles/MulticommodityTradeTariffsandRerouting.pdf

The case study in the paper focuses on tea, which is produced in both China and Vietnam, and, in our numerical examples, can be rerouted, with associated additional costs (although it is illegal) to demand markets. It is important to model and to quantify trade-offs associated with such illicit tariff evasion in order to provide policy- and decision-makers with insights for interdiction purposes. Our research continues.

Three Papers Accepted in One Week!

My Mother always said that "good news comes in threes" and this week we certainly had some much appreciated good news.

My paper, "NetwORks and Policies: OR to the Rescue," which is based on the Blackett Lecture that I delivered at The Royal Society in London, England on December 5, 2024, thanks to The Operational Research Society, was accepted for publication in the Journal of the Operational Research Society. And, incredibly, I received the galleys of the paper yesterday (a Saturday) and they were in great shape. Below is the first page.

And, since the Blackett Lecture experience was so special I include a collage below made of photos from the event, with deep gratitude for all that took part.

Many thanks also to The Operational Research Society for posting my Blackett Lecture online on Youtube: https://www.youtube.com/watch?v=S-LsIEsi-m0

Also, we heard from the International Transactions in Operational Research that the paper, "Integrated Crop and Cargo War Risk Insurance: Application to Ukraine," that I co-authored with my PhD student Ismael Pour and Professor Borys Kormych of the Odesa Law Academy in Ukraine, was accepted for publication. We hope to receive the galleys soon. Professor Kormych is a Virtual Scholar in our terrific UMass Amherst - Kyiv School of Economics (KSE) partnership. He was in the first cohort and is also in the second cohort. You can read more about the Virtual Scholars and their Faculty Hosts at the Isenberg School of Management here: https://www.umass.edu/global-affairs/news/kyiv-school-economics-and-university-massachusetts-amherst-launch-second-round-virtual-scholar

We heard the good news shortly after Ismael Pour presented the paper in the doctoral seminar in Management Science that I am teaching this semester. We took the nice photo below with him and Yongdong Chen and Samira Samadi (both also PhD students in the seminar) after Ismael's presentation.

Ismael will present this paper at the POMS Conference in Atlanta next month.

Also, Samira (full first name is Samirasadat) and I got the paper, "Multicommodity Trade, Tariffs, and Rerouting," accepted in a very special volume: Convex and Variational Analysis with Applications: In Honor of Terry Rockafellar’s 90th Birthday. Panos M. Pardalos and Themistocles M. Rassias, Editors, Springer Nature Switzerland AG. This is a very interesting and timely paper, given the trade wars that are happening now in real time. It discusses the evasion of tariffs and impacts through rerouting, with minimum processing, except for repackaging/relabeling in other countries.

We are grateful to the Editors and reviewers of our papers.

I Had a Great Time Speaking on Agricultural Supply Chain Networks at the University of Louisville in Kentucky

I returned from Louisville, Kentucky, past midnight. Immediately after my Humanitarian Logistics & Healthcare class at the Isenberg School of Management this past Thursday, I headed to Bradley airport for my flight to Detroit, and onwards to Louisville. I was very excited to have been invited to speak at the Department of Industrial Engineering at the University of Louisville. I was invited by Professor Lihui Bai, who, along with Professor Monica Gentili, co-directs the Logistics and Distribution Institute there. Professor Bai's PhD advisor at the University of Florida was Don Hearn, who was a good friend of my PhD advisor, Stella Dafermos of Brown University. Both have passed away.

It was also wonderful to be in a warmer climate with even flowers, after a very long winter in New England. It was great to meet in the morning with Professors Yunmei Liu and Thomas Riedel (a University of Massachusetts Amherst PhD alumnus), and to hear Professor Bai's PhD students speak on their fascinating research! One of Dr. Bai's PhD students is now working with one of my former PhD students and Dr. Bai.  A feature of academia that I love is all the connections that we have across the miles. Thanks also to Professor Brian Yueshuai He for meeting with me and discussing congestion pricing in Manhattan. He has a PhD from the Tandon School at NYU.   I thoroughly enjoyed speaking about agricultural supply chain networks and the many challenges that exist today (including tariffs) and how we quantify resilience and robustness under disaster scenarios. I also spoke on making an impact and interacting with journalists and the media as well as legislators. The Q&A was excellent after my presentation and we took a nice group photo.

The lunch at the University Club with Interim School of Business Dean Jeff Guan, the Chair of Computer Science and Engineering Wei Zhang, and Dr. Bai, which included oysters, was delicious. Another highlight was a group discussion with the IE PhD students, from so many countries (Turkey, Iran, Sri Lanka, Bangladesh....). Their energy, enthusiasm, and passion for their research are uplifting. I was surprised by a beautiful gift of stunning coasters presented to me with Kentucky Derby artwork on them.  We will use them when we toast the derby in early May! 

Sincerest thanks to all and especially to Professor Lihui Bai for the exceptional hospitality extended to me and for the great attention to detail in organizing my visit.

Many thanks to Delta for terrific 4 flights and for upgrades! 

Tariffs and Trade - Some of Our Studies

Today has been quite the day. It is just mid-afternoon, and, in addition to a Kyiv School of Economics Board of Directors meeting on Zoom on various important issues, I managed, as of now, to do 4 interviews with the media on Trump, tariffs, and trade, because (we will see if this comes to pass), as of midnight tonight, Trump is to impose 25% tariffs on products from our neighbor Canada and 10% tariffs on products from China. The tariffs on Mexican products have been "paused" for 30 days, due to an agreement between the two Presidents. The situation is incredibly dynamic and volatile.

When I agree to interview requests, it is on topics that are not only timely but ones that we have conducted research on. I  remember fondly when we began to write on the impacts of tariffs (and there are several types, I might add). Colleagues, who were then at Cornell University, Charles F. Nicholson and Phillip M Bishop, were working on impacts of ad valorem tariffs on dairy products from Mexico, had reached out to me and then visited me at the University of Massachusetts Amherst. We published a series of papers, including one in the Annals of Operations Research. Since then, collaborations (and publications) have continued, many with a focus on agricultural products and the impacts of trade policies. Thanks to my co-authors: Dana Hassani, Oleg Nivievskyi, Pavel Martyshev, Deniz Besik, PhD, Michelle Li, June Dong, Ladimer Nagurney, and Mojtaba Salarpour for research that continues to resonate, with acknowledgment to journals, including: the Journal of Global Optimization, the European Journal of Operational Research, Transportation Research E, and the International Transactions in Operational Research, that have published our work on tariffs and other policy instruments (such as quotas and subsidies) and their impacts on commodity flows, producer and consumer prices, and consumer welfare! And for a recent podcast that I did on Talk The Talk with Bill Newman and Buz Eisenberg, for WHMP, on Trump, tariffs and tradeoffs, click here: https://soundcloud.com/whmp/umass-isenberg-school-prof

Below is a collage of first pages of several of our papers on tariffs.

You can find many preprints of the above articles and other ones on the Supernetwork Center website: https://supernet.isenberg.umass.edu/dart.html

Some Recent Coverage of Our Research in the Media

Next Monday, President-elect Donald Trump will be inaugurated for his second term in office. We can expect a quite dynamic, volatile period. I believe that the research that we have been doing will be extremely relevant from the modeling of tariffs and other policy instruments, such as quotas, and their impacts on a variety of product supply chains, to start.

I am gearing up for media inquiries and believe that, as an educator, it is very important to respond and to inform the public.

In the past few weeks, during the winter break at the University of Massachusetts, I have not only been getting ready for the spring semester and have also been writing papers, but, in addition, I've had several interviews and press releases on our work.

I am very pleased that the professional society of INFORMS issued a press release on our recent paper, "A Multiperiod, Multicommodity, Capacitated International Agricultural Trade Network Equilibrium Model with Applications to Ukraine in Wartime,"  published in Transportation Science. This paper I co-authored with my PhD student Dana Hassani and with Kyiv School of Economics (KSE) colleagues: Oleg Nivievskyi, and Pavlo Martyshev. The press release is available here: https://www.informs.org/News-Room/INFORMS-Releases/News-Releases/New-Study-Shows-How-Ukraine-War-Impacts-Global-Food-Supply-Chain-Urges-Alternative-Routes-for-Grains. Many thanks to Ashley Smith of INFORMS for this excellent writeup!

Also, UMass Amherst released this press announcement https://www.umass.edu/news/article/anna-nagurney-co-edits-new-book-disaster-management-research on my latest book, Dynamics of Disasters: From Natural Phenomena to Human Activity, co-edited with colleagues: Ilias S. Kotsireas, Panos M. Pardalos, Sten Pickl, and Chrys Vogiatzis and published by Springer Nature in late December. This book is extremely timely and contains 10 refereed chapters plus a preface. 

Recently, I was on Talk The Talk on WHMP to speak with Bill Newman and Bud Eisenberg on Trump, Tariffs and Tradeoffs: https://soundcloud.com/whmp/umass-isenberg-school-prof?in=whmp/sets/on-ice

We had such a lively discussion that they have asked me to come back after the inauguration.

And, just a few days ago, I had the pleasure of speaking with Janet Nguyen of Marketplace for her article, "Do blood donation centers sell your blood?" https://www.marketplace.org/2025/01/10/do-blood-donation-centers-sell-your-blood/ My research group has written many studies on blood supply chains and my article in The Conversation,  published shortly after the World Health Organization (WHO) declared the COVID-19 pandemic, helped to influence national policy on blood donations; see: https://annanagurney.blogspot.com/2023/12/honored-to-have-played-part-in.html

In late December I was interviewed for this deeply researched article on sanctions on Russia and chemicals published by Reuters: https://www.reuters.com/world/europe/russian-billionaires-whose-chemical-factories-fuel-russias-war-machine-2024-12-30/

And, not long before that, I was interviewed for this article in The New York Times on how Trump's tariffs would deal a big blow to the auto industry: https://www.nytimes.com/2024/11/26/business/trump-tariffs-mexico-canada-cars.html

Stay tuned! Interesting times await us!

Bravo to Deniz Besik on Her Successful PhD Defense

Yesterday, was a very special day. Deniz Besik, who is my 22nd PhD student, successfully defended her doctoral dissertation at the Isenberg School of Management. The title of her dissertation is: "Essays on Competitive Perishable Food Supply Chain Networks: From the Impacts of Tariffs and Quotas to Integration of Quality." I had the pleasure of chairing her dissertation committee, which consisted of Professors Ana Muriel and Hari Balasubramanian of the College of Engineering at UMass Amherst and Professor Priyank Arora of my department at the Isenberg School.

Although the defense took place at 3:30PM on a Friday afternoon, the room was packed with Deniz's friends and colleagues and guests who had come to support her. Some had traveled from Boston and NYC to come to support her. Dr. Pritha Dutta, who was my 21st PhD student, and is now a Professor at Pace University, came from NYC.

Deniz in 4 and a half years as a doctoral student published 6 co-authored papers, which is an incredible accomplishment. Below are images of first pages of some of the articles.

Deniz was recognized for her research with the 2019 Outstanding Doctoral Student Researcher Award from the Isenberg School and took part in the INFORMS, POMS, and DSI doctoral colloquia. And, we recently heard that she was elected into the Phi Kappa Phi Honor Society. The ceremony will take place in early April and the UMass Amherst graduation in early May (assuming such events will be able to proceed, given the coronavirus).

The audience had great questions, given the timeliness of the dissertation as well as the clarity with which Deniz presented the results in her dissertation. Below is a photo of now Dr. Deniz Besik with her committee members after her defense.

And we managed to take a photo of some of the folks in the audience who stayed until after 5PM to congratulate her.

She was presented with flowers and I also gave her a gift.

Then it was time for a celebratory dinner, which took place at Judie's in downtown Amherst.

Followed by a very special dessert with candle.

I might add that Deniz during her doctoral studies also taught classes and she even served as the President of the UMass Amherst INFORMS Student Chapter. She has accepted a tenure track Assistant Professorship at the Robins School of Business at the University of Richmond in beautiful Virginia. The rewards of being a faculty member are many, but one of the best is seeing a very deserving and hard-working student achieve her dreams. We all wish Dr. Deniz Besik much continuing professional and personal success as she begins a new chapter as an Assistant Professor!