Abstract
We generalize the standard, private values voting model with single-peaked preferences and incomplete information by introducing interdependent preferences. Our main results show how standard mechanisms that are outcome-equivalent and implement the Con-dorcet winner under complete information or under private values yield starkly di¤erent outcomes if values are interdependent. We also propose a new notion of Condorcet winner under incomplete information and interdependent preferences, and discuss its implementation. The new phenomena in this paper arise because di¤erent voting rules (including dynamic ones) induce di¤erent processes of information aggregation and learning.