Imagine a region suffering from a widening income gap that becomes eligible for a generous transfer programme (the treatment). Imagine difference-in-differences analysis (DD) - a before-and-after comparison of the income-level difference - shows that the handicap has risen. Most observers would...

Population aging in Europe calls for an overall rise in the age of retirement. However, most observers agree that the latter should be differentiated to account for different individuals' heterogeneous health when they grow older. This paper explores the relevance of this idea using the European...