In this seminar you should expect to read and research on topics related to the demographic transition, population dynamics, individual behavior and institutional and policy design. One part of the students will make their essay on on causes for demographic transition and its effect on the main macroeconmic variables. The other part will work on topics related to the effects of population aging on today's society and pension systems. Here we will explore different types of individual behavior on labour supply, retirement decisions and savings and, additionally, pension systems' design.