Hanming Fang and Qing Gong (American Economic Review, forthcoming): https://www.aeaweb.org/articles?id=10.1257/aer.20160349
Whoriskey and Keating (Washingon Post, 2013): https://www.washingtonpost.com/business/economy/how-a-secretive-panel-uses-data-that-distorts-doctors-pay/2013/07/20/ee134e3a-eda8-11e2-9008-61e94a7ea20d_story.html