States merge small and medium sized municipalities to achieve economies of scale. Little is known to which extent mergers of large local governments reduce expenditures. I use the synthetic control method to identify the effect of mergers of county-sized administrations in Germany (districts) on...

States merge local governments to achieve economies of scale. Little is known to which extent mergers of county-sized local governments reduce expenditures, and influence political outcomes. I use the synthetic control method to identify the effect of mergers of large local governments in...