The paper develops a stand-alone and testable gravity model to explain international patterns of foreign direct investment (FDI). The core model is based on knowledge-based gravitational forces that are directly or indirectly linked to a country's economic mass (GDP). The micro-economic part of...

The paper models the links between public and firm-level knowledge processes. The knowledge-capital (KC) theory assumes that firms use their private knowledge assets to set up foreign subsidiaries. Countries with large outward FDI stocks should have a relative abundance of proprietary knowledge...

The first of both short essays deals with two structural constraints that distinguish services markets from e.g. markets for manufacturing products. The 'nearness restriction' requires that producer and consumer of the service product are present on the same location. The 'non-storability...

Using panel data for German and Dutch firms from the services sector, this paper analyses the importance of ICT capital deepening and innovation for productivity. We employ a model that takes into account that innovation and ICT use may be complementary. The results show that the contribution of...