jointly with Olivier Gossner and Penelope Hernandez. The Shapley value Neyman has made numerous fundamental contributions to the theory of the value. In a "remarkable tour-de-force of combinatorial reasoning", he proved the existence of an asymptotic value for weighted majority games. The proof was facilitated by his fundamental contribution to renewal theory. In subsequent work Neyman proved that many of the assumptions made in these works can be relaxed, while showing that others are essential. Neyman proved the diagonality of continuous values, which had many implications on further developments of the theory. Together with Pradeep Dubey and Robert James Weber he studied the theory of semivalues, and separately demonstrated its importance in political economy. Together with Pradeep Dubey he characterized the well-known phenomenon of value correspondence, a fundamental notion in economics, originating already in Edgeworth's work and Adam Smith before him. In loose terms, it essentially states that in a large economy consisting of many economically insignificant agents, the core of the economy coincides with the perfectly competitive outcomes, which in the case of differentiable preferences is a unique element that is the Aumann–Shapley value. Another major contribution of Neyman was the introduction of the Neyman value, a far-reaching generalization of the Aumann–Shapley value to the case of non-differentiable vector measure games. Other Neyman has made contributions to other fields of mathematics, usually motivated by problems in game theory. Among these contributions are a renewal theorem for sampling without replacement (mentioned above as applied to the theory of the value), contributions to embeddings of Lp spaces, contributions to the theory of vector measures, and to the theory of non-expansive mappings. Business involvements Neyman previously served (2005–8) as director at Tradus (previously named QXL). He also held a directorship (2004–5) at Gilat Satellite Networks. In 1999, Neyman co-founded Bidorbuy, the first online auction company to operate in India and in South Africa, and serves as the chairman of the board. Since 2013, he has held a directorship at the Israeli bank Mizrahi-Tefahot. References External links Neyman’s homepage Full publication list 1949 births Living people Israeli mathematicians Jewish scientists Israeli economists Game theorists Fellows of the Econometric Society Academic staff of the Hebrew University of Jerusalem Israeli Jews he:אברהם נוימן