Crowd workers are distributed and decentralized. While decentralization is\ndesigned to utilize independent judgment to promote high-quality results, it\nparadoxically undercuts behaviors and institutions that are critical to\nhigh-quality work. Reputation is one central example: crowdsourcing systems\ndepend on reputation scores from decentralized workers and requesters, but\nthese scores are notoriously inflated and uninformative. In this paper, we draw\ninspiration from historical worker guilds (e.g., in the si…