July 2014 Aggregate Data Release

We are releasing a major new version of our state and chamber-level aggregate data. Here are the highlights of the July 2014 release:

  1. In all, we have 342 additional chamber-years of new data, or about 25% more than the previous release.
  2. The data now extend through 2013 for most, but not all, states. Major holes of missing state-years have been filled.
  3. The individual level data underlying this release has been extensively cleaned and remerged to minimize noise inherent in projects like this.

You can find the data here.

The individual level data will be posted very soon, as well.

If you find the data useful, please cite it as well the 2011 article on which the data is based. Feel free to contact us if you have questions about this data.

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