Justin Wolfers(@JustinWolfers):It finally happened. That moment in an absent-minded professor's life when I walked into a packed classroom of hundreds of students, and started teaching the wrong lecture. They had all done the reading, so must have known. No-one interrupted me, until a few minutes in.

Justin Wolfers

@JustinWolfers

Prof @UMichEcon & @FordSchool | Fellow @BrookingsInst | Intro Econ textbook author | |

Joined July 2011

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Justin Wolfers@JustinWolfers

2026.09.21 20:15

It finally happened. That moment in an absent-minded professor's life when I walked into a packed classroom of hundreds of students, and started teaching the wrong lecture. They had all done the reading, so must have known. No-one interrupted me, until a few minutes in.

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