Thomas J. Sargent is Donald Lucas Professor of Economics at Stanford University and Senior Fellow at the Hoover Institution. A pioneer of the rational expectations school of macroeconomics, he is the author of The Conquest of American Inflation (Princeton), Bounded Rationality in Macroeconomics, and Dynamic Macroeconomic Theory. François R. Velde is Senior Economist at the Federal Reserve Bank in Chicago and Lecturer in Economics at the University of Chicago.