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While many theories of the firm seek to explain when firms make rather than buy, in practice firms often make and buy the same input- they engage in plural sourcing. We argue that explaining the mix of external procurement and internal sourcing for the same input requires a consideration of...

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This paper analyses an evolutionary version of the Public Good game of Eshel, Samuelson, and Shaked (1998) in which agents can choose between imitation and best-reply decision rules. We describe conditions under which altruistic and spiteful (maximizing) behavior arise: these conditions are...