An Elementary Core Equivalence Theorem in a Countable Economy

@inproceedings{Tasndi2003AnEC,
  title={An Elementary Core Equivalence Theorem in a Countable Economy},
  author={Attila Tasn{\'a}di},
  year={2003}
}
We consider an infinite exchange economy with countable many traders, which can be regarded as a natural extension of finite exchange economies to an infinite one. In our countable economy the core defined in the traditional manner would be empty. To avoid this unwanted situation we have to strengthen the notion of “improves upon”. We will achieve this based on the idea that forming coalitions involve costs. 
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