This paper discusses the importance of local knowledge for institutional epistemology—the study of the epistemic capacities and dysfunctions of institutions, and the choice and design of institutions needed to discover, correct, and transmit the information needed to solve collective action problems. Local knowledge is knowledge of particulars held by individuals and communities with deep familiarity with those particulars. Political economists in anti-authoritarian traditions have long stressed the importance of local knowledge for solving many collective action problems. Institutions capable of deploying (...) such knowledge effectively must include the bearers of relevant local knowledge, recognize them as experts with respect to it, and respect their autonomy in deploying their local knowledge to solve such problems. I focus on mētis, a type of practical local knowledge of how to interact with particulars. I argue that the need for relevant mētis justifies three policies: (1) resisting the proletarianization of professionals; (2) taking affirmative action to include members of marginalized groups in research and the professions; and (3) recognizing the scientific status of certain types of Indigenous knowledge and incorporating it into science curricula. (shrink)