Four Corners offers two membership categories: Academic Membership and Industry Membership. 

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Academic Membership is for professional academic researchers working in the field of financial economics as it relates to index investments (broadly defined). Academic members are invited to submit links to published and unpublished research papers for the Four Corners' Research Library and to provide links to their data for the Four Corners' Data Depot. Please note that prospective academic members must be nominated by at least one existing member to be considered by the Board for membership.

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Industry Membership is for professionals working in the finance industry as it relates to index investments (broadly defined). Industry members are welcomed to bring their expertise on markets, institutions, and regulations to the Four Corners' community. Please note that prospective industry members must be nominated by at least one existing member to be considered by the Board for membership.