00964nam a22001457a 4500 521205 521205 221226b ||||| |||| 00| 0 eng d Bloch, Francis and Olckers, Matthew 36414 Friend-based ranking American Economic Journal: Microeconomics 14(2), May, 2022: p.176-214 We analyze the design of a mechanism to extract a ranking of individuals according to a unidimensional characteristic, such as ability or need. Individuals, connected on a social network, only have local information about the ranking. We show that a planner can construct an ex post incentive compatible and efficient mechanism if and only if every pair of friends has a friend in common. We characterize the windmill network as the sparsest social network for which the planner can always construct a complete ranking. – Reproduced American Economic Journal: Microeconomics RANKING AR 0 0 ddc 0 0 395257 IIPA IIPA 2022-12-26 14(2), May, 2022: p.176-214 AR127753 2022-12-26 AR