The North American economist Paul Krugman, poses after an interview with Europa Press at the Rafael del Pino Foundation on February 17, 2020 in Madrid, Spain.

Paul Krugman, Nobel laureate in economics, author of the substack Krugman wonks out, distinguished professor at the City University of New York Graduate Center, and the author of Arguing with Zombies: Economics, Politics, and the Fight for a Better Future (W. W. Norton & Company, 2020), reflects on retiring after 25 years as a New York Times columnist, and looks ahead to the next Trump administration.