It is a highly controversial topic, both in the regulatory as well as the scientific research environment, whether the beta factor - as a measure for systematic risk - for fixed line and that for mobile operations has actually the same value. Since most telecommunications operators are today...

This paper studies the effects of investment tax credits on firms’ input choices by exploitinga sudden shift in the tax credit rate by firm size for manufacturing firms in Germany in 1999. I find that more generous tax credits lead to a significant increase in both investment and employment,...