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Single-Crossing Differences in Convex Environments
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DOI：10.1093/restud/rdad103.png)
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摘要
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An agent's preferences depend on an ordered parameter or type. We characterize the set of utility functions with single-crossing differences (SCD) in convex environments. These include preferences over lotteries, both in expected utility and rank-dependent utility frameworks, and preferences over bundles of goods and over consumption streams. Our notion of SCD does not presume an order on the choice space. This unordered SCD is necessary and sufficient for interval choice comparative statics. We present applications to cheap talk, observational learning, and collective choice, showing how convex environments arise in these problems and how SCD/interval choice are useful. Methodologically, our main characterization stems from a result on linear aggregations of single-crossing functions.
Keyword:
Monotone comparative statics
Choice among lotteries
Interval equilibria
Aggregating single crossing
期刊
IF:
6.4
论文数:
2.5K
被引数:
2.1W
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