About: Incomplete markets

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In economics, incomplete markets are markets in which there does not exist an Arrow–Debreu security for every possible state of nature. In contrast with complete markets, this shortage of securities will likely restrict individuals from transferring the desired level of wealth among states.

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  • In economics, incomplete markets are markets in which there does not exist an Arrow–Debreu security for every possible state of nature. In contrast with complete markets, this shortage of securities will likely restrict individuals from transferring the desired level of wealth among states. An Arrow security purchased or sold at date t is a contract promising to deliver one unit of income in one of the possible contingencies which can occur at date t + 1. If at each date-event there exists a complete set of such contracts, one for each contingency that can occur at the following date, individuals will trade these contracts in order to insure against future risks, targeting a desirable and budget feasible level of consumption in each state (i.e. consumption smoothing). In most set ups when these contracts are not available, optimal risk sharing between agents will not be possible. For this scenario, agents (homeowners, workers, firms, investors, etc.) will lack the instruments to insure against future risks such as employment status, health, labor income, prices, among others. (en)
  • En economía, los mercados incompletos son mercados en los que el número de valores de Arrow-Debreu es menor que el número de estados de la naturaleza. ​ A diferencia de los mercados completos, esta escasez de valores probablemente restringirá a las personas la transferencia del nivel deseado de riqueza entre los estados. (es)
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  • En economía, los mercados incompletos son mercados en los que el número de valores de Arrow-Debreu es menor que el número de estados de la naturaleza. ​ A diferencia de los mercados completos, esta escasez de valores probablemente restringirá a las personas la transferencia del nivel deseado de riqueza entre los estados. (es)
  • In economics, incomplete markets are markets in which there does not exist an Arrow–Debreu security for every possible state of nature. In contrast with complete markets, this shortage of securities will likely restrict individuals from transferring the desired level of wealth among states. (en)
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  • Mercado incompleto (es)
  • Incomplete markets (en)
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