I’m a professor who’s interested in our economic history and the theory that went into making it — for good or ill. On this column, called Past & Present, I write about how history can help illuminate the economic challenges we face today, and how very often historical sources do validate free-market economics. I’m author of what’s now the standard history of supply-side economics, «Econoclasts: The Rebels Who Sparked the Supply-Side Revolution and Restored American Prosperity» (2009). I have a Ph.D. from Harvard, am a senior associate at the Laffer Center, and live in that game capital of the Americas, Houston. Other experience includes a year at the University of Colorado Boulder, where I was the Visiting Scholar in Conservative Thought and Policy. Larry Kudlow and I have published a book on the history of the great John F. Kennedy tax cut and its influence on both the 1960s and the 1980s, «JFK and the Reagan Revolution: A Secret History of American Prosperity» (Portfolio, 2016).