Helmut Schneider 1. The Formulation of the Research Programme 1. In the late sixties the acceleration of US inflation revived the discussion of the fifties about the superiority of flexible exchange rates: The US balance of payments deteriorated since 1965, the dollar shortage after World War II changed to a dollar surplus. The import of US inflation by their main trading partners intensified political pressures so that at the beginning of the seventies most leading countries decided, contrary to the rules of the Bretton Woods agreement, to stop their intervention in the market for foreign exchange and to let the exchange rates be determined by market forces. It is worthwhile recalling that at that time one had only very limited experience with the regime of flexible exchange rates: The most important case, the floating of Canadian against the US dollar, could not be generalized to a world where nearly all important countries adhered to the regime of flexible exchange rates. ! - But one really had rich experience with destabilizing capital flows (or "hot money") that forced monetary authorities to adjust exchange rates in a system of managed flexibility to the expecta tions of "speculators".

The large aggregates in the economy - consumption, investment, production of the domestic and the international sectors, international capital flows, financial accumulation and indebtedness - are analysed in this book as problems in time-optimisation for enterprises and households. The effects of fiscal and monetary policies along with exchange-rate variation are examined, and their simultaneous use for stabilizing demand are found to be necessary. All household decisions on consumptions, savings, and financial disposition are conditioned by uncertainty, and similarly for firms, who make more complex simultaneous decisions on production, real investment, financing, and market strategy. The marginal efficiency-of-investment function derived from these decisions is fundamentally different from the marginal productivity of capital in the neoclassical sense. An economy which grows through the accumulation of capital, increase in labor supply, and technological progress is the framework in which all of these variables move. This codetermines the allocation of factors between domestic and international production, and the development of foreign trade. The growth both of the public debt and of international investment are treated in depth.

The overriding force in economic growth is progress, both in general state of the arts, and in applied technology. These are qualitatively different and their optimization is explored with dynamic programming. With numerous goods and factors of production the production frontier becomes a hyperplane. Its dimensionality depends on the number and positioning of activities around the vector of factor endowments, as is shown with the simplex method. There may be market distortions of the ceiling and departures from it: policy measures are examined for the U.S. and Germany. Contents: Innovation and progress in the arts - Optimal saving and resource depletion - Multiplicity of goods and factors - Frontier expansion - Departures from the frontier and corrective measures.