Since 1993: Scientific advisor, Foundation for Research in Economics and Business Administration;
Since 1997: Senior researcher, Norwegian Research Centre in Organization and Management
Visiting fellow, Yale University, 1964-65;
Visiting fellow, CORE, Université Catholique de Louvain, 1969-70;
Visiting professor, University of Essex, 1975-76;
Senior researcher, Norwegian Research Centre in Organization and Management, 1987-92
Since 1998: Institute for International Economic Studies, University of Stockholm, Board member;
Since 1991: Center for Economic Studies, Universität München, Council member;
Since 2000: CESifo Group, München, Council member
Publications
"On the theory of the competitive firm under price uncertainty", American Economic Review 61, (1971) 65-73;
"Income tax evasion: A theoretical analysis", Journal of Public Economics 1, (1972) 323-338, with Michael G. Allingham;
"Optimal taxation in the presence of externalities", Swedish Journal of Economics 77, no. 1 1975, 86-98;
"Optimal taxation: An introduction to the literature", Journal of Public Economics 6, (1976) 37-54;
"Welfare implications of the taxation of savings", Economic Journal 90, (1980) 529-549, with A.B. Atkinson;
"Tax evasion, labour supply and the equity-efficiency tradeoff", Journal of Public Economics 16 (1981) 265-288;
"The effects of taxation on saving and risk-taking", A.J. Auerbach & M.S. Feldstein (eds.), Handbook of Public Economics, Vol. 1, North-Holland Publishing Co., Amsterdam, 1985, 265-311;
"Tax distortions and household production", Oxford Economic Papers 42 (1990) 78-90;
"Economists and the welfare state", European Economic Review 35 (1991) 213-239. Norwegian version as chapter 2 in 100;
"Redistribution and the marginal cost of public funds," Journal of Public Economics 70 (1998) 365-382;
"Asymmetric information and public economics: The Mirrlees-Vickrey Nobel Prize," Journal of Economic Perspectives 13, Winter, 1999, 165-180;
The Public Economics of the Environment, Oxford University Press, Oxford 2000, Pp. x + 163