For a whole generation, Harvard professor Gregory Mankiw defined the conventional wisdom in economics. He taught the university’s introductory course for 14 years. I read his best-selling textbooks to help prepare for grad school, and later used them when I taught undergraduate macroeconomics. When people say “Econ 101,” he’s probably somewhere in the back of their minds.

Now, the era of Mankiw may be coming to an end. He’s stepping down from Harvard’s “Principles of Economics,” giving way to an era of greater uncertainty.