Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
In this paper, we investigate how political institutions affect policy outcomes. In particular, does the level of political centralization affect the outcome of environmental decentralization? We use a cross section of up to 110 countries and a propensity score estimation approach. We find that political centralization, measured by the strength of national level political parties, increases the stringency of environmental policies set under decentralized regimes.