Michael Keen is a deputy director of the Fiscal Affairs dptm at the IMF, was a professor of Economics at the University of Essex and visiting Professor at Kyoto & Queens Universities, has led technical assistance missions to nearly 30 countries on a wide range of issues in tax policy, consulted for the World Bank, European Commission, and the private sector, served on the Board of the National Tax Association in the U.S, was on the editorial boards of many journals, has written books on: