Today I posted the individual, legislator-level ideology data as well as the aggregate state and chamber-level data for our state legislature ideology data. The data is free for public download and use. Please cite our data and paper if you use this in your academic work, and/or link back to us in other work.
We have extended the data collection through 2016 (in other words, the results of 2014 and 2015 state elections). We now have 22,868 unique state legislators in our data, as well as 2,025 chamber-years of aggregate data, compared to 20,783 legislators and 1,816 chamber-years in the previous release.
As with previous iterations, we have continued to spend a lot of time and effort cleaning up the data; there should be far fewer noise-related issues. But please let us know if you see particular problems.
Bugs should be reported to us.
The roll call data collection in this update has been supported financially by the Laura and John Arnold Foundation, the National Science Foundation, Princeton University, and the University of Houston.