- ECONOMICS LETTERS Journal
- December 2016
Digital Object Identifier (DOI)
International Standard Serial Number (ISSN)
Electronic International Standard Serial Number (EISSN)
- In this paper, we propose the use of Dynamic Conditional Score (DCS) count panel data models. We compare the statistical performance of the static model with different dynamic models: finite distributed lag, exponential feedback and different DCS models. For DCS, we consider random walk or quasi-autoregressive dynamics. We use panel data for a large cross section of United States firms for period 1979-2000, and the Poisson quasi-maximum likelihood estimator with fixed effects. The empirical results suggest that DCS has the best statistical performance. (C) 2016 Elsevier B.V. All rights reserved.
- research and development; patent count panel data; dynamic conditional score; quasi-maximum likelihood; maximum-likelihood methods; poisson counts; spillovers