Anna Nagurney

Russia has escalated its strikes on the country’s critical railway infrastructure, targeting Ukrainian Railways, also known as Ukrzaliznytsia, in what appears to be a bid to disrupt military logistics...

Harvard University is one of the most difficult schools to gain admission to, with the school turning away some 97% of applicants every year.

The impact of the government shutdown hit travelers across the United States Monday, as air traffic controllers called out sick, closing a control tower and leading to delays at major airports.

Trio led experiments demonstrating that bizarre properties of quantum world can translate into measurable effects in the everyday The Nobel prize in physics 2025 has been awarded to British, French and American scientists for their work on quantum mechanics. John Clarke, a British physicist based at the University of California at Berkeley, Michel Devoret, a French physicist based at Yale University, and John Martinis, of the University of California Santa Barbara, share the 11m Swedish kronor (about £871,400) prize announced by the Royal Swedish Academy of Sciences in Stockholm. Continue reading...

The Trump administration has announced the cancellation of $7.6 billion in funding for clean energy projects across 16 states.

INFORMS announces the results of the 2025 election for the Board of Directors. These new members will begin their tenure on the board beginning January 1, 2026.

"Due to power surges, the New Safe Confinement — the key structure that isolates the destroyed 4th reactor of the Chornobyl Nuclear Power Plant and prevents the release of radioactive materials into t...

BALTIMORE, Sept. 19, 2025 – INFORMS, the world’s largest association for professionals and students in operations research (O.R.), AI, analytics and data science, has named 12 distinguished leaders as...

This paper constructs a multicommodity spatial price equilibrium framework designed to allow for the quantification of the impacts of congestion and transportation capacities on trade flows and product prices while capturing the degradation of fresh produce quality through explicit quality deterioration formulas. We present the multicommodity fresh produce trade network model under equilibrium conditions both without and with minimum quality standards. Alternative variational inequality formulations of the governing equilibrium conditions are derived, with one of them exhibiting particularly favorable features for computational purposes. The numerical examples focus on the banana trade, since bananas are the most widely traded fresh produce commodity globally, with leading exporters being Ecuador and Costa Rica and major importers, the United States and the European Union. Through various scenarios, we simulate congestion and time delays in the Panama Canal and report on the impacts of ongoing disruptions on shipment times, equilibrium shipment volumes, the supply and demand prices, quality levels at the supply markets and at the demand markets, and transportation costs. Our baseline numerical example results closely align with real-life data on export volumes of bananas, the associated supply and demand prices, and the transportation costs. The comprehensive numerical results reveal that reductions in transportation capacity and prolonged shipment times, as in the Panama Canal due to climate-related issues, lead to decreased banana shipment volumes, increased initial quality, but diminished final quality of bananas at demand markets. This exposes significant challenges for consumers, as well as for producers, as instances of transportation capacity disruptions and extended shipment times result in higher prices for lower-quality bananas.

At least four people were killed in the attack, which also wounded dozens of civilians in the capital and around the country.