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Heterogeneous Distributions of Firms Sustained by Innovation Dynamics-A Model with Empirical Illustrations and Analysis
KTH, Skolan för industriell teknik och management (ITM), Centra, Centrum för studier inom vetenskap och innovation, CESIS.
KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.), Samhällsekonomi (Stängd 20130101). KTH, Skolan för industriell teknik och management (ITM), Centra, Centrum för studier inom vetenskap och innovation, CESIS.
2012 (engelsk)Inngår i: Journal of Industry, Competition and Trade, ISSN 1566-1679, E-ISSN 1573-7012, Vol. 12, nr 2, s. 239-263Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper develops a framework of innovation dynamics to appreciate observed heterogeneity of firm size distributions, in which dynamics refer to exit and entry of product varieties and variety markets of individual firms. The analysis is based on a model of variety-triplets where every such triplet in the economy is identified by a unique combination of a variety, destination and firm. New variety triplets are introduced by innovating firms in a quasi-temporal setting of monopolistic competition. Ideas for variety-triplets arrive to firms according to a firm-specific and state dependent Poisson process, whereas variety triplets exit according to a destination-specific Poisson process. The empirical analysis employs a detailed firm-level data base which provides information about all variety triplets. Firm size is measured by a firm's number of variety triplets. The empirical results are compatible with the model predictions of (i) a persistent distribution of firm sizes, (ii) frequent events of exit and entry, and (iii) state dependent entry, where a state may be given by each firm's composition of triplets and/or other firm attributes.

sted, utgiver, år, opplag, sider
2012. Vol. 12, nr 2, s. 239-263
Emneord [en]
dynamics, entry, exit, firm heterogeneity, innovation, size distribution
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-96178DOI: 10.1007/s10842-010-0092-zScopus ID: 2-s2.0-84860919080OAI: oai:DiVA.org:kth-96178DiVA, id: diva2:532344
Merknad

QC 20120611

Tilgjengelig fra: 2012-06-11 Laget: 2012-05-31 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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