This paper inverts the usual logic of applied optimal income taxation. It starts from the observed distribution of income before and after redistribution and corresponding marginal tax rates. Under a set of simplifying assumptions, it is then possible to recover the social welfare function that...

Aid co-ordination is a constant theme of discussion among national and international aid agencies in their search for more effectiveness and efficiency in delivering development assistance. This paper seeks to clarify some of the arguments currently made in support of aid co-ordination, and to...

Over the past 20 years, microsimulation models have come to play an important role in policy analysis, identifying gainers and losers, and characterising the effect on incentives. A natural development of national models is a Europe-wide tax benefit model. The present paper reports results from...