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APA Citation
Simpson, B., Harrell, A., Melamed, D., Heiserman, N., & Negraia, D. V. (2018). the Roots of Reciprocity: Gratitude and Reputation in Generalized Exchange Systems. American sociological review, 83(1), 88–110. http://access.bl.uk/ark:/81055/vdc_100071293663.0x000009