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Cohort and period effects in the long run decline of mortality , Paris 1817-2000

A growing body of evidence suggests there is a long lasting impact of early life conditions. This suggests an important role for cohort effects in mortality decline. Here we investigate mortality in the very long run so as to estimate the role of cohort effects in the mortality transition. We focus solely on Paris so as to control as best as possible for sanitary improvements. We do three things. First, we compute yearly mortality rates over more than 150 years to measure both cohort and period effects. Second we document where sanitary improvements took place in the city at different times. Third we mobilize individual data on mortality that allow us to distinguish those born in Paris from the whole population so as to control for the huge migration flow.