| Summary: | 碩士 === 東海大學 === 國際貿易學系 === 97 === This research refers to the Stefan Buehler, Armin Schmutzler（2008）,using the interplay of endogenous vertical and cost-reducing downstream investment ,and the concept of the R&D information flows from Milliou（2004）. Therefore, we extended the economic mathematics model in Stefan Buehler, Armin Schmutzler（2008）, assumed that there is oligopoly competition in the upstream and downstream and asymmetric integration model, and mainly discussed the relationship between the spillover effect of vertical integration and cost-reducing downstream investment. The spillover effect represents the extent to which a downstream firm absorbs technological knowledge and productivity knowledge from R&D investment of its competitor in decreasing the production cost. Analyze how the investment of the vertically integrated firm affects the level of the investment of the nonintegrated firm when firms have spillover effect.
To conclude, we derived three important findings in our research:
1.While market size increases, the investment levels of the vertically integrated firm and the nonintegrated firm will increase.
2.When firms have spillover effect, the price will decrease.
3.When firms have spillover effect, the output and profit of the vertically integrated firm will increase；the output , profit and R&D investment of the nonintegrated firm will decrease.
4. The vertically integrated firm increases cost-reducing investment and the nonintegrated firm will increases cost-reducing investment, this is intimidation effect. The intimidation effect of vertically integrated firm decreases when the R&D diminishing return increases.
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