"Better Alone? Evidence on the Costs of Intermunicipal Cooperation”, CEPR Discussion Paper No. 15999, April 2021 (Also CESifo Working Paper No. 9000). Revised February 2022. Winner, 2021 CESifo Distinguished Research Affiliate Award; Winner, 2021 Wicksell Prize, European Public Choice Society; Honorable Mention, 2019 UEA Conference