Although early human capital theory recognized the relevance of workers' experience, its focus was on education and formal training. Recent studies find that much of the performance of newly hired workers is driven by learning by doing or learning from peers or supervisors in the workplace....

Against the background of demographic change and skill shortages continuing vocational training is of great significance in Germany. However, the training effectiveness is mostly assessed only at the end of a training program or several months after the training. Since in continuing vocational...