Funding for this research was provided by:
Received: 10 June 2020
Accepted: 5 October 2021
First Online: 12 November 2021
: The work of Michael Heinrich Baumann was supported by Hanns Seidel Stiftung (HSS), funded by Bundesministerium für Bildung und Forschung (BMBF). The author declares that he has no conflict of interest. Empirical data are available on THOMSON REUTERS DATASTREAM. The code is available from the author upon reasonable request.