In this paper we present a history-friendly model of the changing vertical scope of computer firms during the evolution of the computer and semiconductor industries. The model is “history friendly”, in that it attempts at replicating some basic, stylized qualitative features of the evolution...

This paper estimates the process of diffusion and decay of knowledge from university, public laboratories and corporate patents in six countries and tests the differences across countries and across technological fields using data from the European Patent Office. It finds that university and...

This paper studies the nature, sources and determinants of international patenting activity in Latin American countries (LACs) and examines the extent to which LACs benefit from R&D that is performed in the G-5 countries (France, Germany, Japan, United Kingdom, and United States). By using...

The rate of technical change that is characterising both the telecommunications and the computer industry has been a major driver of the evolution of a close and stable system into an open and dynamic one. The introduction of a cluster of new technologies has originated significant changes...

This paper estimates the diffusion and obsolescence of technological knowledge by technological field, country and type of institutions that generates it. We use two comparable samples of patents and patent citations from the NBER U.S. Patent Citations Dataset (based on patents from the US...

[It is widely acknowledged that firms performing R&D investments are very likely to undergo financial constraints (FC) due to their specific characteristics, which make external debt an imperfect substitute for internal finance,especially for small sized enterprises. This situation calls into...

The geography of innovation traditionally concentrates on localised knowledge spillovers, yet neglects collaboration networks as a means to access knowledge outside the region. Using publication and patent data for 1316 regions in the EU27 plus Norway and Switzerland, we find that both localised...

This work is concerned with the determinants of innovations and competition of technologies in the case of the Local Area Network industry. It focuses in particular on two suppliers of LAN components: the access technology industry and the internetworking industry. Two elements driving the...

Technical change can affect existing products very rapidly and at an uneven pace depending on the type and on the age of an industry. In young and fast growing industries, the process of technological change usually entails a series of improvements in existing products that affect their...

This paper explores the rules which regulate market shares dynamics within industries jointly with the mechanisms underpinning a process of general evolution in which n sectors grow at different rates and structural change takes place. It introduces a selection equation, which allows for...