Arthur Betz Laffer (; born August 14, 1940) is an American economist and author who first gained prominence during the Reagan administration as a member of Reagan's Economic Policy Advisory Board (1981–89). Laffer is best known for the Laffer curve, an illustration of the concept that there exists some tax rate between 0% and 100% that will result in maximum tax revenue for government. In certain circumstances, this would allow governments to cut taxes, and simultaneously increase revenue and economic growth.