Market manipulation with outside incentives

Verfasser / Beitragende:
[Yiling Chen, Xi Gao, Rick Goldstein, Ian Kash]
Ort, Verlag, Jahr:
2015
Enthalten in:
Autonomous Agents and Multi-Agent Systems, 29/2(2015-03-01), 230-265
Format:
Artikel (online)
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024 7 0 |a 10.1007/s10458-014-9249-1  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s10458-014-9249-1 
245 0 0 |a Market manipulation with outside incentives  |h [Elektronische Daten]  |c [Yiling Chen, Xi Gao, Rick Goldstein, Ian Kash] 
520 3 |a Much evidence has shown that prediction markets can effectively aggregate dispersed information about uncertain future events and produce remarkably accurate forecasts. However, if the market prediction will be used for decision making, a strategic participant with a vested interest in the decision outcome may manipulate the market prediction to influence the resulting decision. The presence of such incentives outside of the market would seem to damage the market's ability to aggregate information because of the potential distrust among market participants. While this is true under some conditions, we show that, if the existence of such incentives is certain and common knowledge, in many cases, there exist separating equilibria where each participant changes the market probability to different values given different private signals and information is fully aggregated in the market. At each separating equilibrium, the participant with outside incentives makes a costly move to gain trust from other participants. While there also exist pooling equilibria where a participant changes the market probability to the same value given different private signals and information loss occurs, we give evidence suggesting that two separating equilibria are more natural and desirable than many other equilibria of this game by considering domination-based belief refinement, social welfare, and the expected payoff of either participant in the game. When the existence of outside incentives is uncertain, however, trust cannot be established between players if the outside incentive is sufficiently large and we lose the separability at equilibria. 
540 |a The Author(s), 2014 
690 7 |a Market manipulation  |2 nationallicence 
690 7 |a Equilibrium analysis  |2 nationallicence 
690 7 |a Prediction market  |2 nationallicence 
690 7 |a Information aggregation  |2 nationallicence 
700 1 |a Chen  |D Yiling  |u School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA  |4 aut 
700 1 |a Gao  |D Xi  |u School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA  |4 aut 
700 1 |a Goldstein  |D Rick  |u Analytics Operations Engineering, Boston, MA, USA  |4 aut 
700 1 |a Kash  |D Ian  |u Microsoft Research, Cambridge, UK  |4 aut 
773 0 |t Autonomous Agents and Multi-Agent Systems  |d Springer US; http://www.springer-ny.com  |g 29/2(2015-03-01), 230-265  |x 1387-2532  |q 29:2<230  |1 2015  |2 29  |o 10458 
856 4 0 |u https://doi.org/10.1007/s10458-014-9249-1  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s10458-014-9249-1  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Chen  |D Yiling  |u School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Gao  |D Xi  |u School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Goldstein  |D Rick  |u Analytics Operations Engineering, Boston, MA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Kash  |D Ian  |u Microsoft Research, Cambridge, UK  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Autonomous Agents and Multi-Agent Systems  |d Springer US; http://www.springer-ny.com  |g 29/2(2015-03-01), 230-265  |x 1387-2532  |q 29:2<230  |1 2015  |2 29  |o 10458