本人急需以下几篇文献,望能弄到这几篇文献的好心人帮帮忙,感激不尽!

Xavier, V., 1988. on the efficiency of Bertrand and Cournot equilibria with product differentiation. In: Daughety, A.F. (Ed.), Cournot Oligopoly.Cambridge University Press, Cambridge.

Banker, R.D., Khosla, I., Sinha, K.K., 1998. Quality and competition. Management Science 44 (9), 1179–1192.

Dixit, A., 1979. A model of duopoly suggesting a theory of entry barriers. Bell Journal of Economics 10, 20–32.

Matsubayashi, N., 2007. Price and quality competition: The effect of differentiation and vertical integration. European Journal of Operational Research 180 (2), 907–921.