This book contains a collection of essays written by renowned economists on the occasion of Andras Brody's 70th birthday. Andras Brody has contributed to many fields of economics, including mathematical modelling, the theory of economic growth, marxian economics and input-output analysis. The essays contained in this book deal with new results in these and related fields, and cover both theoretical and empirical aspects. Among the topics being discussed are foundations of input-output analysis, methodologies for measuring economic growth and structural change, and normative aspects of economic behaviour. The book also includes a chapter on the extraordinary event of building an input-output table for the newly reunited Germany.