I am writing to urge the Federal Trade Commission to fully explore the potential ramifications of the behavioral experiment performed by Facebook in 2012. Recent reports indicate Facebook altered the news feeds of almost 700,000 of its users to determine whether emotions and moods might be transmitted between users. As the collection and analysis of "big data" continues to increase, and as it assumes a larger role in the business plans of Internet-based companies, it is appropriate that we consider questions about what, if any, oversight might be appropriate, and whether best practices should be developed and implemented by the industry or by the FTC. Given the FTC's leadership in this area, including your recent data brokers report, and your previous oversight of Facebook's privacy policies, I also would be interested to know if this 2012 experiment violated Section 5 of the FTC Act or the 2011 consent agreement with Facebook.