Lifelong learning represents a key response to the demographic challenge in Germany. In terms of professional success, not only hard skills but also soft skills hold importance. Indeed, the OECD competence tests PISA and PIAAC have come to the fore, although acquired skills are still relevant....

During the last decade knowledge about human behavior from psychology and sociology has enhanced the field of economics of education. By now research recognizes cognitive skills (as measured by achievement tests) and soft skills (personality traits not adequately measured by achievement tests)...