期刊
JOURNAL OF TECHNOLOGY TRANSFER
卷 34, 期 2, 页码 226-243出版社
SPRINGER
DOI: 10.1007/s10961-007-9072-9
关键词
Innovation; Persistence; State dependence; Unobserved heterogeneity; Dynamic random effects panel probit model
This paper investigates whether firms innovate persistently or discontinuously over time using an innovation panel data set on German manufacturing and service firms for the period 1994-2002. It turns out that innovation behaviour is permanent at the firm level to a very large extent. Using a dynamic random effects discrete choice model and a new estimator recently proposed by Wooldridge (2005), I further shed some light on the driving forces for this phenomenon. The econometric results show that past innovation experience is an important determinant for manufacturing as well as for service sector firms, and hence confirm the hypothesis of true state dependence. In addition, the results highlight the important role of knowledge provided by skilled employees and unobserved individual heterogeneity in explaining the persistence of innovation.
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