R&D, Firm Size, and Product Innovation Dynamics

Marco Corsino, Giuseppe Espa (giuseppe.espa@economia.unitn.it) and Rocco Micciolo (rocco.micciolo@unitn.it)

No 45, ROCK Working Papers from Department of Computer and Management Sciences, University of Trento, Italy

Abstract: This paper addresses a debated issue in the economics innovation literature, namely the existence of increasing return to R&D expenditures and sirm size on innovation output. It further explores how structural characteristics of the sirm as well as contextual factors affect the dynamics of product innovation over a relatively long period of time. Taking advantage of an original and unique database comprising innovation data recorded on a monthly base we show that: (i) a negative binomial distribution model is able to predict with great accuracy the probability of having a given number of product announcement sent out in a month; (ii) constant returns to size and R&D expenditure may reasonably characterize the innovation production function of sampled sirms; (iii) vertically integrated manufacturers as well as producers operating a larger product portfolio exhibit a higher propensity to introduce new products than their specialized competitors.

Pages: 22 pages
Date: 2008-05, Revised 2008-06-12
New Economics Papers: this item is included in nep-ipr, nep-pr~ and nep-knm
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Citations: View citations in EconPapers (1)

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Working Paper: R&D, firm size, and product innovation dynamics (2008)
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