Abstract
Non-standard analysis is an area of mathematics that provides a natural framework for the discussion of infinite economies. It is more suitable in many ways than Lebesgue measure theory as a source of models for large but finite economies since the sets of traders in such models are infinite sets which can be manipulated as though they were finite sets. The number system used to describe non-standard economies is an extension of the real numbers R; it is denoted by ∗R. The set ∗R contains ‘infinite natural numbers’ and their multiplicative inverses, which are positive infinitesimals. It was with the development in 1960 of such a number system that Abraham Robinson (1974) solved an age-old problem by making rigorous the use of infinitesimals in mathematical analysis. Robinson gave a model-theoretic approach to his theory that is relevant to any infinite mathematical structure; that approach starts by listing the basic properties of the new number system. Before taking up this approach, however, it will be helpful to consider a simple nonstandard extension of the real numbers system that is constructed from sequences of real numbers.
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Bibliography
Ali Khan, M., and S. Rashid. 1982. Approximate equilibria in markets with indivisible commodities. Journal of Economic Theory 28 (1): 82–101.
Anderson, R.M. 1978. An elementary core equivalence theorem. Econometrica 46 (6): 1483–1487.
Anderson, R.M., M. Ali Khan, and S. Rashid. 1982. Approximate equilibria with bounds independent of preferences. Review of Economic Studies 49: 473–475.
Brown, D.J., and P.A. Loeb. 1976. The values of nonstandard exchange economies. Israel Journal of Mathematics 25 (12): 71–86.
Brown, D.J., and A. Robinson. 1975. Nonstandard exchange economies. Econometrica 43 (1): 41–55.
Emmons, D.W. 1984. Existence of Lindahl equilibria in measure theoretic economies without ordered preferences. Journal of Economic Theory 34 (2): 342–359.
Loeb, P.A. 1973. A combinatorial analog of Lyapunov’s theorem for infinitesimally generated atomic vector measures. Proceedings of the American Mathematical Society 39 (3): 585–586.
Loeb, P.A. 1975. Conversion from nonstandard to standard measure spaces and applications in probability theory. Transactions of the American Mathematical Society 211: 113–122.
Rashid, S. 1979. The relationship between measure-theoretic and non-standard exchange economies. Journal of Mathematical Economics 6 (2): 195–202.
Robinson, A. 1974. Non-standard analysis. Rev ed. Amsterdam: North-Holland.
Stroyan, K.D. 1983. Myopic utility functions on sequential economies. Journal of Mathematical Economics 11 (3): 267–276.
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Loeb, P.A., Rashid, S. (2018). Non-standard Analysis. In: The New Palgrave Dictionary of Economics. Palgrave Macmillan, London. https://doi.org/10.1057/978-1-349-95189-5_1383
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DOI: https://doi.org/10.1057/978-1-349-95189-5_1383
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