Hans R.A. Koster is Professor of Urban Economics and Real Estate at Vrije Universiteit Amsterdam and an urban economist focusing on housing markets, urban spatial structure, spatial inequality, and regional policies. He teaches courses on applied econometrics, spatial and urban economics and serves as associate editor at Regional Science and Urban Economics. His work has appeared in leading journals and has earned several awards.Stef Proost is Professor Emeritus at KULeuven, where he taught Environmental, Energy and Transport economics to engineers and economists. His research focuses on tax reform, climate change, and political economics of transport pricing and investment. He was visiting professor at several universities in the US, France, Germany, and Sweden. Jacques-François Thisse is Professor Emeritus at UC Louvain. A Fellow of the Econometric Society and the Regional Science Association International, he has published over 200 articles in scientific journals and indifferent fields such as industrial organization, spatial and urban economics, trade and management science. He was awarded in 2024 the Founder's Medal of the Regional Science Association International.