Below is a list of the prizewinners during the period 1996 - 2000 with a description of the works which won them their prizes:(1996) J A MIRRLEES & W S VICKREY — for their fundamental contributions to the economic theory of incentives under asymmetric information; (1997) R C MERTON & M A SCHOLES — for a new method to determine the value of derivatives; (1998) A K SEN — for his contributions to welfare economics; (1999) R A MUNDELL — for his analysis of monetary and fiscal policy under different exchange rate regimes and his analysis of optimum currency areas; (2000) J J HECKMAN — for his development of theory and methods for analyzing selective samples & D L McFADDEN — for his development of theory and methods for analyzing discrete choice.