Contributions by: Lawrence R. Klein, Kenneth J. Arrow, Paul A. Samuelson, Milton Friedman, George J. Stigler, James Tobin, Franco Modigliani, James M. Buchanan, Robert M. Solow, William F. Sharpe, Douglas C. North, Myron S. Scholes, Gary Stanley Becker, Robert E. Lucas Jr., James J. Heckman, Vernon L. Smith, Edward C. Prescott, Thomas Schelling, Edmund S. Phelps, Eric Maskin, Joseph E. Stiglitz, Paul Krugman, Peter A. Diamond