“…This explains that larger municipalities tend to cooperate less often because they may achieve scale economies by themselves, consistent with results in Warner and Hefetz (2002) and Carr, LeRoux and Shrestha (2009). Finally, cooperation may be less likely when the supervision of the service is more complex (that is, when population of the municipality is more dispersed) and when the coordination with the county may be also more complex (when major and the county's chair are from a different political party), all of this is consistent with findings in Shrestha and Feiock (2011) on transaction costs and on reciprocal exchange, and results in LeRoux, Brandenburger and Pandey (2010) on social networks and cooperation.…”