@article{oai:bunkyo.repo.nii.ac.jp:00003730, author = {杉山, 富士雄 and スギヤマ, フジオ and Sugiyama, Fujio}, journal = {文教大学国際学部紀要, Journal of the Faculty of International Studies Bunkyo University}, month = {1998-01-01, 2011-02-24}, note = {First chapter of this paper considers theoretically some questions regarding the effect of the future demand growth in a customer market on price destruction. Constructing a very simplified mathematical model in which duopolistic competition firms choose price competitions over two periods and consumers have to incur switching costs as a result of substituting another firms' products for their curret suppliers' products. In my mathematical model, the relationship between the future demand growth rate changes and the degree of competition in a customer market is examined under various assumptions about future prices.  Second chapter is on how financial structure affect the market value of each duopolistic competition firm in a customer market. If duopolistic cometition firms in a customer market issue long- term debts, the market values and equilibrium prices are different when fixed investments are financed completely by equity or when financed by long- term debt. If duopolistic competition firms have existing senior debts and require additional debts to finance new investment, first period prices are higher in a debt financed customer market than in one in which all firms are completely equity financed. Thus the market value of each duopolistic competition firm is higher when debt financing is used than it is when both firms are completely equity financed. Limited liability effects of debt finacing alter the market value of each dupolistic competition firm in a customer market.}, pages = {87--99}, title = {顧客市場における複占競争の諸特質}, volume = {8}, year = {} }