{"title":"进入的外部效应","authors":"Steffen Ziss","doi":"10.1111/manc.12501","DOIUrl":null,"url":null,"abstract":"<p>This paper provides an analysis of the external effect of entry for both differentiated and homogenous products which takes account of the integer constraint, allows for cost-based or quality-based differences in firm size and for variation in firm conduct. The analysis shows that the external effect of entry is positive if the entrant is sufficiently large compared to the average incumbent, but not necessarily larger than the average incumbent, market conduct is competitive, there are few incumbents, marginal cost is steep relative to demand or products are sufficiently differentiated. These results contribute to the literature by expanding the set of market settings for which the external effect of entry is positive and thus for which profitable entry raises welfare.</p>","PeriodicalId":47546,"journal":{"name":"Manchester School","volume":"93 3","pages":"230-241"},"PeriodicalIF":0.7000,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/manc.12501","citationCount":"0","resultStr":"{\"title\":\"External Effect of Entry\",\"authors\":\"Steffen Ziss\",\"doi\":\"10.1111/manc.12501\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>This paper provides an analysis of the external effect of entry for both differentiated and homogenous products which takes account of the integer constraint, allows for cost-based or quality-based differences in firm size and for variation in firm conduct. The analysis shows that the external effect of entry is positive if the entrant is sufficiently large compared to the average incumbent, but not necessarily larger than the average incumbent, market conduct is competitive, there are few incumbents, marginal cost is steep relative to demand or products are sufficiently differentiated. These results contribute to the literature by expanding the set of market settings for which the external effect of entry is positive and thus for which profitable entry raises welfare.</p>\",\"PeriodicalId\":47546,\"journal\":{\"name\":\"Manchester School\",\"volume\":\"93 3\",\"pages\":\"230-241\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-12-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1111/manc.12501\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Manchester School\",\"FirstCategoryId\":\"96\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/manc.12501\",\"RegionNum\":4,\"RegionCategory\":\"经济学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ECONOMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Manchester School","FirstCategoryId":"96","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/manc.12501","RegionNum":4,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ECONOMICS","Score":null,"Total":0}
This paper provides an analysis of the external effect of entry for both differentiated and homogenous products which takes account of the integer constraint, allows for cost-based or quality-based differences in firm size and for variation in firm conduct. The analysis shows that the external effect of entry is positive if the entrant is sufficiently large compared to the average incumbent, but not necessarily larger than the average incumbent, market conduct is competitive, there are few incumbents, marginal cost is steep relative to demand or products are sufficiently differentiated. These results contribute to the literature by expanding the set of market settings for which the external effect of entry is positive and thus for which profitable entry raises welfare.
期刊介绍：
The Manchester School was first published more than seventy years ago and has become a distinguished, internationally recognised, general economics journal. The Manchester School publishes high-quality research covering all areas of the economics discipline, although the editors particularly encourage original contributions, or authoritative surveys, in the fields of microeconomics (including industrial organisation and game theory), macroeconomics, econometrics (both theory and applied) and labour economics.
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