This paper studies the design of the optimal non linear taxation in an economy where longevity varies across agents, and depends on three factors: longevity genes, health investment and farsightedness. Provided earnings, farsightedness and genes are correlated, governmental intervention can be...

This paper studies a problem of non linear taxation when individuals have different longevities resulting from a non-monetary effort (like exercising). We first present the laissez-faire and the first best. Like Becker and Philipson (1998), we find that the laissez-faire level of effort is too...

Developing countries are facing the Covid-19 epidemic with particular challenges, such as their economic and labor force composition. In this research I will extend the so-called SIR-macro model with demand and supply effects to study how the size of the informal sector impact the ability of...