The status of planning: an overview; Models and policy: the dialogue between model builder and planner; Theoretical foundations and technical implications; Quantitative foundations and implications of planning processes; Intersectoral consistency and macroeconomic planning; The foreign trade sector in planning models; Employment and human capital formation; Planning models, shadow prices, and project evaluation; Planning for multiple goals; Interindustry planning models for a multiregional economy; Planning with economies os scale; Substitution and nonlinearities in planning models.