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Anti-Hotelling: Relaxing Price Competition Through Product Differentiation (Now published in Review of Economic Studies, vol.49 (January 1982), pp.3-14.)
Shaked, Avner, (1981)
Natural Oligopolies (Now published in Econometrica, vol.51, No.5, (1983), pp.1469-1483.)
Gibrats Legacy
Sutton, John, (1996)