Part 1 Essays in Economics; Chapter I The balance of the economy of the USSR; Chapter II The theory and statistical description of concentration; Chapter III Theoretical assumptions and nonobserved facts; Chapter IV An alternative to aggregation in input-output analysis and national accounts; Chapter V The dynamic inverse; Chapter VI Environmental repercussions and the economic structure: an input-output approach; Chapter VII National income, economic structure, and environmental externalities; Chapter VIII An international comparison of factor costs and factor use; Chapter IX Explanatory power of the comparative cost theory of international trade and its limits; Chapter X Structure of the world economy; Chapter XI National economic planning: methods and problems;