In the Bipartisan Campaign Reform Act of 2002, Congress mandated that GAO study the results of the unique public financing programs in Maine and Arizona. For the 2000 and 2002 elections in Maine and Arizona, this report provides both statistics on the number of candidates who chose to campaign with public funds and the number who were elected and observations, based on limited data, regarding the extent to which the goals of the public funding programs were met.
You can read the study here