エビナ　タケシ   EBINA TAKESHI   海老名　剛    所属   明治大学  商学部    職種   専任教授
言語種別	英語
発行・発表の年月	2012/08
形態種別	学術雑誌
査読	査読あり
標題	"Endogenous Product Differentiation and Product R&D in Spatial Cournot Competition", Annals of Regional Science
執筆形態	共著(筆頭者)
掲載誌名	Annals of Regional Science
掲載区分	国外
出版社・発行元	Springer
巻・号・頁	49(1),pp.117-133
著者・共著者	Takeshi Ebina and Daisuke Shimizu
概要	We investigate in a spatial Cournot competition setting how much product research and development (R&D) investment firms make in order to differentiate their goods. The model features a location competition in the first stage, R&D competition in the second stage, and Cournot competition in the third stage. There are two differentiation methods in the model-spatial differentiation affecting the firm costs, and differentiation in the demand function affecting the demand levels. We find that comparing to the setting with no spatial connotation, the firms tend to invest less in product R&D. We also consider welfare implications. Although the firms employ maximum differentiation in equilibrium, there are cases in which welfare can be improved if the firms are to locate closer to each other.
researchmap用URL	https://researchmap.jp/ebinatakeshi2010/