Microeconomics: clarification of the analysis of returns to scale, the interpretation of the objectives sought by the firm, the theory of forward markets and the analysis of changes in preferences. Macroeconomics: elaboration of a number of aspects of the balanced budget multi plier, the need for interventionist macroeconomic policy, and the nature of macroeconomics itself.
Special Adviser, United Kingdom Secretary State Education and Science, 1974-1975. Senior Special Adviser, United Kingdom Secretary of State Prices and Consumer Protection,
9. Chairman, Economics Board, United Kingdom Social Science Research Council, United Kingdom or United States of America, 1976-1979.
Professor of Economics, Queen Mary College, London, England, since 1979. Editor, Applied, Economics, . Council Member, Royal Economic Society, United Kingdom, since 1978.