This is the code and data for our Harvard-published paper, which can be found at https://techscience.org/a/2015081104/. The replicate data and code can be found at the Harvard Dataverse
The paper has also been mentioned in Forbes, The Atlantic, CNBC.
The steps referenced in the ipynb file correspond to the steps in our paper.
Key findings:
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The largest insurance company in each state on average increased their rates 75% more than smaller insurers in the same state
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The largest insurance companies do not appear to be paying for higher medical costs per premium dollar versus smaller insurers in the reported experience period of 2013
Impact:
Cited in both House and Senate testimonies, caused Center for Medicare & Medicaid (CMS) to conduct an emergency review and revision of insurance companies' risk corridor data.
Thanks for reading me! :)