Michele W. Berger

Try this thought experiment from the world of philosophy. Imagine a train moving quickly down a track. On its current route, call it Path A, five people stand fixed in place; in another direction, Path B, one immoveable individual waits. A single flip of a switch, at which you happen to be standing, shifts the train’s direction from Path A to B, saving five people but dooming one.

The Kleinman Center for Energy Policy at the University of Pennsylvania’s School of Design has named three new senior fellows: William Hederman, former senior advisor to the U.S.

Cristina Bicchieri’s work is not for the faint of heart.

Nearly every country in Latin America has a conditional cash transfer program. Poor households living below the poverty line can receive government subsidies if they agree to the program’s stipulations, usually a mandate that the families invest in the well-being of their children. But how does this influx of cash affect the decision-making process for these households?

How much marijuana does the average joint contain?

Deena Weisberg spends a lot of time talking to preschoolers.

Beth Murray’s not your typical intern.

By Patrick Ammerman What could be the downside to unemployment rates plummeting in recent years? One place to look is the road. Research has shown that when the economy improves, motor vehicle fatalities also increase.

College-age women who participate in sorority rush largely describe the process as negative but report a sense of belonging and support once they’re in the group, according to research from University of Pennsylvania psychologist Melissa Hunt and Penn alumna Colleen Kase.

In an ideal world, physicians consider factors such as a patient’s cognitive and psychological ability, brain activity, and even environmental stressors to decide the best treatment option.