My automobile emission standards database that I used for the paper titled "Policy Diffusion of Emission Standards: Is there a Race to the Top?" (World Politics, in press) can be found here.

This is a STATA data file and it provides the year a country adopted automobile emission standards equivalent to Euro 1, Japan 76 or US 81. If you use this data, please provide the citation of this paper.

For questions or errors, please report to