We evaluate the actual effectiveness of disincentives that have been introduced for early retirement in Germany. Therefore, we set up a detailed model of the German social security and tax system with special attention to the PAYG-pension system. Building on the fact that the institutional...

We revisit a service provider's problem to match supply and demand via an online appointment system such as a doctor in the health care sector. We identify in a survey that an extensive set of available appointments leads to significantly less demand because customers infer a lower quality of...