The aim of the article is to investigate if there exists a systematic link between size of the firm, market concentration and R&D activity of firms. Three tentative results emerged from the regression analysis based on the firm balanced panel data 1998-2006. First it follows from a regression...

The paper focuses on a comparison of three different approaches that seek to explain the existence of public goods. First the mainstream Samuelson-Musgrave approach, based on the search for an objective nature of so-called pure public goods, is critically evaluated, especially with respect to...