منابع مشابه
Assignment Exchanges
Assignment Exchanges Paul Milgrom September 6, 2008 Abstract. We analyze assignment exchanges –auction and exchange mechanisms which are tight simplifications of direct Walrasian exchange mechanisms. These simplifications are distinguished by their use of “assignment messages,” which parameterize certain substitutable preferences. The “basic” assignment exchanges respect integer constraints, ge...
متن کاملSensitivities of peripheral lymphocytes from healthy humans to induction of sister chromatid exchanges by chemicals.
The spontaneous sister chromatid exchanges (SCEs) and SCEs induced by 50 microM methyl methanesulfonate, 1 microM 4-nitroquinoline 1-oxide, and 5 microM 3-amino-1-methyl-5H-pyrido[4,3-b]indole were examined in phytohemagglutinin-activated peripheral lymphocytes from 53 healthy adult donors. The means of the mean spontaneous SCEs and SCEs induced by methyl methanesulfonate, 4-nitroquinoline 1-ox...
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The conservation of crop genetic resources requires understanding the different variables-cultural, social, and economic-that impinge on crop diversity. In small-scale farming systems, seed exchanges represent a key mechanism in the dynamics of crop genetic diversity, and analyzing the rules that structure social networks of seed exchange between farmer communities can help decipher patterns of...
متن کاملMaking Bitcoin Exchanges Transparent
Bitcoin exchanges are a vital component of the Bitcoin ecosystem. They are a gateway from the classical economy to the cryptocurrency economy, facilitating the exchange between fiat currency and bitcoins. However, exchanges are also single points of failure, operating outside the Bitcoin blockchain, requiring users to entrust them with their funds in order to operate. In this work we present a ...
متن کاملArbitrage in Combinatorial Exchanges
Combinatorial exchanges are trading mechanisms that allow agents to specify preferences over bundles of goods. When agents’ preferences exhibit complementarity and/or substitutability, this additional expressiveness can lead to more efficient allocations than is possible using traditional exchanges. In the context of combinatorial exchanges, this paper examines arbitrage, a risk-free profit opp...
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ژورنال
عنوان ژورنال: Nature
سال: 1975
ISSN: 0028-0836,1476-4687
DOI: 10.1038/257441b0