The relative importance of intra-industry or inter-industry knowledge spillovers for the growth of cities remains an open question. Using a unique data set on the growth of 109 British cities during 1951--1991, we find evidence suggesting that the most important knowledge spillovers occur...

This paper examines the stock market reaction to research and development (R&D) announcements made by listed UK companies. R&D projects on average are found to be associated with significant positive abnormal returns. However, the level of these abnormal returns varies significantly with the...