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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66569
Title: | 雙佔廠商存在不確定因素或外溢效果下之研發行為分析 Uncertainty or Spillovers of Product Innovation in Duopoly |
Authors: | Siao-Wun Huang 黃筱雯 |
Advisor: | 彭信坤 |
Keyword: | 垂直差異化,不確定因素,外溢效果,品質研發,品質差距, product innovation,vertical product differentiation,uncertainty,spillovers,technology adoption, |
Publication Year : | 2012 |
Degree: | 碩士 |
Abstract: | 本文利用垂直差異化模型來探討雙佔廠商在垂直產品空間中,面對不確定因素或外溢效果時,如何進行產品品質研發行為之決策。
在不確定因素存在的情況下,若產品品質研發為不顯著時,生產較低品質的廠商不會投入研發。在產品品質研發為顯著時,若研發成本非常低,兩家廠商才會同時選擇研發行為。這結論與確定情況相同,解釋即使在不確定因素存在下,研發成本高低才是影響廠商研發決策的主因。 其次,在外溢效果及學習效果存在時,即使產品品質研發不顯著,只要研發成本夠低且外溢效果相對較大時,均衡會是兩家廠商皆從事研發的情況。這是因為當廠商皆選擇研發時,單方面研發所產生的外溢效果會變成雙方面研發所產生的學習效果,增加了廠商選擇研發行為的誘因。然而當代表廠商接受外溢效果程度的吸收函數很大時,雖會存在單一廠商研發均衡,但此時從事研發的廠商其所能生產之品質會低於未從事研發的廠商。另外,在外溢效果相對較大時,無論產品品質是否顯著,兩家廠商皆從事研發的均衡情況會使得經濟體中的產品品質差距最大。然而,若是產品品質研發為顯著且外溢效果相對較小,此時產品品質差距取決於吸收函數的大小。 We analyze two symmetric firms’ adoption of a product innovation in a vertical differentiation model with uncertainty or spillovers. We show that even uncertainty exists, equilibrium outcomes are same as in the certainty situation. Under uncertainty, adoption costs are affected by the successful probability. On the other hand, with spillovers existing in the model, the equilibrium outcome will be both firms adopting a product innovation as low adoption costs and spillovers relatively high. We find that the learning effect will raise firms’ incentive for the adoption of a product innovation. In particular, the quality gap is most enlarged in this equilibrium. However, there is a kind of equilibrium where the innovating firm produces less quality than the non-innovating firm, when absorbing function which represents the level of spillovers working on firms, is high enough. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66569 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 經濟學系 |
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ntu-101-1.pdf Restricted Access | 1.25 MB | Adobe PDF |
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