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Dynamics of Entry and Exit of Product Varieties – what evolution dynamics can account for the empirical regularities?

Author

Listed:
  • Andersson, Martin

    (CESIS - Centre of Excellence for Science and Innovation Studies, Royal Institute of Technology)

  • Johansson, Börje

    (CESIS - Centre of Excellence for Science and Innovation Studies, Royal Institute of Technology)

  • Månsson, Kristofer

    (CESIS - Centre of Excellence for Science and Innovation Studies, Royal Institute of Technology)

Abstract

Firm-level heterogeneity is substantial even in narrowly defined industries. This paper focuses on formulating evolution dynamics which can account for the observed heterogeneity and its maintenance. Based on examination of data on Swedish firm’ supply pattern to different markets over time, we present a parsimonious model that has the ambition to capture the picture of heterogeneous firms, while accommodating the simultaneous exit and entry of destination varieties in firms’ supply pattern. The model assumes both scale economies of firms and path-dependence, where the latter is manifested in such a way that the arrival rate of innovation ideas to an individual firm is a function of each firm’s stock of varieties at every given point in time. The path-dependence phenomenon is an “explosive” non-linearity, whereas conservation mechanisms include development of demand and exit of established varieties. The described path dependence explains the skewed distribution of varieties across firms, but the question of what keeps the “equilibrium” away from competitive exclusion where only few large firms remain. We make use of simulations to depict and assess the innovation dynamics of the proposed model.

Suggested Citation

  • Andersson, Martin & Johansson, Börje & Månsson, Kristofer, 2009. "Dynamics of Entry and Exit of Product Varieties – what evolution dynamics can account for the empirical regularities?," Working Paper Series in Economics and Institutions of Innovation 204, Royal Institute of Technology, CESIS - Centre of Excellence for Science and Innovation Studies.
    • Handle: RePEc:hhs:cesisp:0204
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    References listed on IDEAS

    as
    1. Martin Andersson & Börje Johansson, 2008. "Innovation Ideas and Regional Characteristics: Product Innovations and Export Entrepreneurship by Firms in Swedish Regions," Growth and Change, Wiley Blackwell, vol. 39(2), pages 193-224, June.
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    More about this item

    Keywords

    innovation; path-dependence; firm-level; heterogeneity; evolution dynamics;
    All these keywords.

    JEL classification:

    • C16 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Econometric and Statistical Methods; Specific Distributions
    • F14 - International Economics - - Trade - - - Empirical Studies of Trade
    • L25 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Firm Performance
    • O33 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Technological Change: Choices and Consequences; Diffusion Processes

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