The psychology of the life span and the sociology of the life course share the same object of scientific inquiry - the lives of women and men from birth to death. Both are part of an interdisciplinary field focused on individual development and life course patterns which also includes social...

How do individuals shape societies? How do societies shape individuals? This paper develops a framework for studying the connections between micro and macro phenomena. The framework builds on two ingredients widely used in social science - population and variable. Starting with the simplest case...