It’s easy to take maps for granted. After all, most of us have a pretty good map in our pockets at all times, ready to show us how to get anywhere on the globe. But to make a map useful, you have to ...

ELIZABETH VAN HEUVELEN is a senior economist in the IMF’s Strategy, Policy, and Review Department. Opinions expressed in articles and other materials are those of the authors; they do not necessarily ...

University of Pennsylvania mathematician Philip Gressman and 11 fellow professors from universities across the state have taken their math skills to court in hopes of ending the decades-old, ...