The current public-radio host and former writer of the popular New York Times Magazine advice column shares three of his favorite posts, collected in the book Be Good.

For years everyone from students to day traders has used Adderall to improve focus and performance. But a new study shows people on “smart drugs” only think they’re doing better, Casey Schwartz reports.

For finals, the annual high-water mark for Adderall use on college campuses, Columbia student Daniel D’Addario goes inside the library to find out who’s using, how they get it—and whether it offers an unfair advantage.