A mandatory open-network-provision (ONP) by dominant firms is the appropriate government regulation in the presence of network externalities. For basic telephone services and online services, a permanent ONP regulation seems indispensable, whereas telecommunication networks only require...

National borders substantially matter in passenger air traffic. Empirical estimates based upon a new data set on domestic and international departures from German airports indicate that the German border reduces air traffic activity by a factor of four to five. This result adds a further piece...

The economic analysis of technology policy suggests non-distortive public support of private innovative activities with a stress upon basic rather than applied research. Actual technology policy in Germany is marked by a high degree of sectoral selectivity which results from the dominance of...