Contenidos:Acknowledgements -- International economic association officers -- List of participants -- Introduction / D.C.Hague - PART I PRICING UNDER CAPITALISM - The task of the contemporary theroy of pricing / D.C.Hague -- Recent german contributions to the theroy of oligopoly / A.E.Ott -- Theorical analysis of the behaviour and decisions of manufacturing firms in western europe / M. Capet -- The role of the retail trade in the competitive system / P. Zusman -- Pricing in publicly-controlled industries / J.S. McGee -- The price level under full employment in the United Kingdom / J. Johnston - PART II PRICING UNDER SOCIALISM - The correct relation between prices of producer goods and wage costs in a socialist economy / J. Lipinski -- Price-fixing and the decentralization of planning / J. Typlot -- Price as a menas of planning the national economy / R. Belousov -- Modern theories of building up price systems in trade between socalist countries / K.I. Popov - PART III THE RELATIONS BETWEEN PRICING AND INVESTMENT DECISIONS - Planning by frecast / J.N. Wolfe -- A study of prices in a planning model / J. Raiman -- A "recoupment period" : model of investment and pricing in a socialist economy / H. Barkai - PART IV REPORT ON THE PROCEEDENGS - Summary record of the debate / Martin Howe.