Defence date: 21 September 2021Examining Board: Prof. Andrea Ichino, EUI, Supervisor, Prof. Giacomo Calzolari, EUI, Co-Supervisor, Prof. Stephen Machin, London School of Economics, Prof. Giulio Zanella, University of Bologna.This thesis consists of four essays in applied microeconomics. Chapter 1 studies the effects of parental job loss on various outcomes of children and provides new evidence on the heterogeneity of these effects along the cognitive ability distribution of children. I find that higher intelligence score protects children from the negative effects, but only in the long run. In the shorter term, instead of protecting, high intelligence exacerbates the cost of parental unemployment in terms of educational outcomes. Thi...