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差异化寡头垄断中的品牌内竞争。

Intra-brand competition in a differentiated oligopoly.

作者信息

Breton Michèle, Sbragia Lucia

机构信息

Department of Decision Sciences, HEC Montréal, Montreal, Canada.

Department of Economics and Finance, Durham University Business School, Durham, UK.

出版信息

J Econ (Vienna). 2021;132(1):1-40. doi: 10.1007/s00712-020-00712-w. Epub 2020 Aug 16.

DOI:10.1007/s00712-020-00712-w
PMID:33568890
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7851986/
Abstract

In this paper we consider a differentiated oligopoly with two product varieties that are supplied by two groups of firms. After computing the Cournot solution of the game, we study its sensitivity to different sources of competition, namely the degree of product substitutability and market composition. Market composition can change either via new firms entering one industry or via firms switching production techniques, thus modifying the intensity of intra-brand competition. After studying the welfare consequences of an intensification of competition, we identify the equilibrium market composition when firms are driven by profit considerations. All the results are expressed in terms of the degree of product substitutability and of what we define "weighted relative efficiency" (WRE), which is a parameter combining both firm characteristics and market conditions.

摘要

在本文中，我们考虑一个差异化寡头垄断市场，其中有两种产品变体，由两组企业供应。在计算出该博弈的古诺解之后，我们研究其对不同竞争来源的敏感性，即产品可替代性程度和市场构成。市场构成的变化可以通过新企业进入一个行业，或者企业改变生产技术来实现，从而改变品牌内竞争的强度。在研究竞争加剧对福利的影响之后，我们确定了企业出于利润考虑时的均衡市场构成。所有结果均以产品可替代性程度以及我们所定义的“加权相对效率”（WRE）来表示，WRE是一个综合了企业特征和市场条件的参数。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/631203192e77/712_2020_712_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/7019a1153afd/712_2020_712_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/e05968cac426/712_2020_712_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/3d26966b703b/712_2020_712_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/e8d717637a14/712_2020_712_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/4656826316f3/712_2020_712_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/92cf61a3fb65/712_2020_712_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/66d3816dcb42/712_2020_712_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/6d3195c0079d/712_2020_712_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/e1cb2415a44d/712_2020_712_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/246d8027e5a1/712_2020_712_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/2f2aa77e013c/712_2020_712_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/61493b329403/712_2020_712_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/631203192e77/712_2020_712_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/7019a1153afd/712_2020_712_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/e05968cac426/712_2020_712_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/3d26966b703b/712_2020_712_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/e8d717637a14/712_2020_712_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/4656826316f3/712_2020_712_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/92cf61a3fb65/712_2020_712_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/66d3816dcb42/712_2020_712_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/6d3195c0079d/712_2020_712_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/e1cb2415a44d/712_2020_712_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/246d8027e5a1/712_2020_712_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/2f2aa77e013c/712_2020_712_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/61493b329403/712_2020_712_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fc79/7851986/631203192e77/712_2020_712_Fig13_HTML.jpg

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