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    Title: 模糊理論應用於寡占市場之研究
    Other Titles: Fuzzy sets and economics-applications of fuzzy mathematics to non-cooperative oligopoly
    Authors: 方茂榮;Fang, Mao-jong
    Contributors: 淡江大學國際貿易學系國際企業學碩士班
    林光賢;Lin, Kuang-hsien;蔡政言;Tsai, Jeng-yan
    Keywords: 模糊理論;寡占;機會成本;猜測行為;Fuzzy Theory;Oligopoly Market;Opportunity Cost;Conjectural Behavior
    Date: 2006
    Issue Date: 2010-01-11 01:44:32 (UTC+8)
    Abstract: 經濟學廠商理論中,傳統上有許多學者以各種不同的模型來詮譯寡占市場上,廠商與廠商間的競爭行為,猜測變量模型為最主要的型模之一,而廠商間的猜測行為是一種非隨機的不確定性,其概念符合Zadeh(1965)所提出的模糊概念,因此本研究將猜測行為視為機會成本加入傳統成本函數中,而有下列命題:
    命題1:對生產差異化產品的廠商而言,它的生產成本較高,所以在市場上該商品應有較高的售價。
    命題1.1:廠商如果均生產同質性的商品,此時應該有相同的售價。
    命題2:在加入模糊機會成本後,廠商在長期均衡時,最大利潤為零。廠商的生產不再是像古典理論所稱的生產無效率,而是生產有效率的均衡。
    命題2.1:而這均衡在長期下是一個獨特的穩定均衡,並且是符合最適技術效率和分配效率。命題 3:偏離均衡產出及均衡價格將是不穩定的均衡。 此時會發生廠商進入或是退出、調整公司規模大小使其合理化。
    In the fields of Industrial Economics, there are many scholars illustrated competition behavior of oligopoly market with the matter of interaction. A conjectural model in oligopoly market and conjectural behavior, which was conformed to fuzzy theory by Zadeh(1965), is to include non-stochastic uncertainties. So, in the research regards conjectural behavior as the opportunity cost and imputes the traditional cost function.
    We conclude the following propositions:
    Proposition 1: As to manufacturer producing difference products, its production cost is relatively high, so that goods should be sale higher prices in the market.
    Proposition 1.1:If firm 2 produce the products the same as firm 1, there are the same prices in the market.
    Proposition 2: After imputing the opportunity cost to the cost function, it is conformed to be profit-maximizing, zero-profit and production-efficient solution in the long run equilibrium .
    Proposition 2.1: And, it is a stable and unique equilibrium in the long-term with technological and allocational efficiency.
    Proposition 3: Deviating from equilibrium, the adjustment (the entry or exit) will occur until firms are fully compensated for their technical and conjectural costs.
    Appears in Collections:[國際企業學系暨研究所] 學位論文

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