“Buy local” arrangements encourage members of a community or group to patronize one another rather than the external economy. They range from formal mechanisms such as local currencies to informal “I’ll buy from you if you buy from me” arrangements, and are often championed on social or environmental grounds. We show that in a monopolistically competitive economy, buy local arrangements can have salutary eﬀects even for selﬁsh agents immune to social or environmental considerations. Buy local arrangements eﬀectively allow ﬁrms to exploit the equilibrium price-cost gap to proﬁtably expand their sales at the going price.
Mailath, George J.; Postlewaite, Andrew; and Samuelson, Larry, "Buying Locally" (2015). Cowles Foundation Discussion Papers. 2421.