This discussion paper describes the extent of social inequalities both within and between the countries of the European Union. In the first three chapters we address the micro level of individual life courses: education, employment and income. The following chapters analyse the societal...

Do contributions to online content platforms induce a feedback loop of ever more user-generated content or will they discourage future contributions? To assess this, we use a randomized field experiment which added content to some pages in Wikipedia while leaving similar pages unchanged. We find...