This paper explains the main features of an innovative linked employer-employee data set with a particular focus on continuous training in Germany, called WeLL. The data set comprises establishment data that can be linked to longitudinal information on the associated employees. The employer...

Based on multivariate linear regression models, we analyze the effect of the lunar cycle and the number of sunspots occurring on a particular day on the number of births using social security data and controlling for a number of other potential confounders. The daily number of births between...