An elementary approach to approximate equilibria with infinitely many commodities

Article Abstract:

Elementary proofs are presented to show the existence of approximate equilibria in a fixed finite exchange economy with an infinite number of commodities but without convexity assumptions. Every trader in the model has a finitely spannable excess demand set that could be covered by a union of its convex subsets in many steps. The per capita aggregate excess demand norm's bound is shown to be reciprocally related to the population's square root.

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Capital as a Commitment: Strategic Investment to Deter Mobility

Article Abstract:

Formulation is provided to give an early market entrant the direction to exploit its head start. Strategic investment is used as a mobility deterrent. Steady-start equilibrium is achieved for the early entrant. Later firms may become indifferent to entry.

Marketing

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Subgame-Perfect Equilibria of Finite-and-Infinite Horizon Games

Article Abstract:

Formulation is devised to characterize equilibria in an infinite horizon game. Simultaneity, uncertainty and mixed strategies are allowed. Infinite-horizon equilibria coincide with the limits of equilibria of finite-horizon truncated games.

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