State-level climate concern in the US, 1999-2017.
From Bergquist, P., & Warshaw, C. (2019). Does Global Warming Increase Public Concern about Climate Change?. The Journal of Politics, 81(2), 686-691.
State-level climate policy regimes in the US, 2000-2020.
From Bergquist, P. & Warshaw, C. (2023), How climate policy commitments influence energy systems and the economy of US States. Nature Communications.