Declining R&D intensities at the national level coincide with growing international technological links. Deviations of individual OECD countries from the average R&D intensity reflect differences in industry structure as well as in sectoral R&D intensity. At the same time, the sectoral...

Declining R&D intensities at the national level coincide with growing international technological links. Deviations of individual OECD countries from the average R&D intensity reflect differences in industry structure as well as in sectoral R&D intensity. At the same time, the sectoral...

The vast majority of U.S. inventors work for firms that also have inventors and plants in other tech clusters. Using merged USPTO-U.S. Census Bureau plant-level data, we show that larger tech clusters not only make local inventors more productive but also raise the productivity of inventors and...

We challenge the view that the presence of powerful buyers stifles suppliers´ incentives to innovate. Following Katz (1987), we model buyer power as buyers´ ability to substitute away from a given supplier and isolate several effects that support the opposite view, namely that the presence of...

Wir untersuchen die Rolle von Vertragstypen und Zugangsregulierung auf Innovation und Wettbewerb. In einem Duopolmodell zeigen wir, dass Ex-post-Verträge, die nach den Investitionsentscheidungen getroffen werden, zu einer Welt führen, in der seltener Infrastruktur dupliziert wird, in der es...

We analyze the role of different contract types and access regulation on innovation and competition in telecommunications in the context of Next Generation Access Networks. Within a standard duopoly model, we show that ex-post access contracts lead less often to the duplication of investment,...

Our analysis starts from the observation that with progressive consolidation in retailing and the spread of private labels, retailers increasingly take over functions in the vertical chain. Focusing on innovation, we isolate various reasons for why when a large retailer grows in size, this can...

This paper analyzes the role of different contract types and access regulation on innovation and competition in telecommunications in the context of Next Generation Access Networks. Within a standard duopoly model, it is shown that ex-post access contracts lead less often to the duplication of...