In knowledge-based economy, knowledge has a public good and non-rivalry nature. Firms build their own knowledge stock not only by means of internal R&D and collaboration with partners, but also by means of previously spilled over knowledge of other firms and public research laboratories (such as universities). Firms based on their absorptive capacity, and level of intra-industry and extra-indus...

investigating two effects can often provide two understand it more , especially when they are from one source but day seem different. in writers idea two effects boof koor (hedayat) and elella (serrano) while they benefit from one manifestation but they seem two separate categories. both of them are discussed in the mental or psychological sense and try to report a new emotion and analyses it a...

This paper provides a critical examination of the widely disseminated view that innovation in all or most activities is favoured by certain common characteristics in the local ‘milieu’, involving a cluster of many small firms benefiting from flexible inter-firm alliances, supported by mutual information exchanges of both an informal and formal nature. The general applicability of this model, an...

We use newly constructed state-specific data to explore the implications of common modeling choices for measures of research returns. Our results indicate that state-to-state spillover effects are important, that the research and development lag is longer than many studies have allowed, and that misspecifi­ cation can give rise to significant biases. Across states, the average of the own-state ...

Does Raising the Retirement Age Increase Employment of Older Workers? This paper studies how an increase in the minimum retirement age affects the labor market behavior of older workers. Between 2000 and 2006 the Austrian government gradually increased the early retirement age from 60 to 62.2 for men and from 55 to 57.2 for women. Using administrative data on the universe of Austrian private-se...

This paper provides a critical examination of the widely disseminated view that innovation in all or most activities is favoured by certain common characteristics in the local ‘milieu’, involving a cluster of many small firms benefiting from flexible inter-firm alliances, supported by mutual information exchanges of both an informal and formal nature. The general applicability of this model, an...

I perform an event study on 600+ patents awarded primarily to 20 leading biotechnology firms and find significant changes in market values at the time of the awards. Adjusting for partial anticipation of events, I estimate that core technology patents in highly contested research areas are expected to generate between $13 and $21 million of economic value. They also generate spillover benefits ...