Following the money: uses and limitations of FEC campaign finance data

Disclosure requirements under US federal campaign finance laws and subsequent court rulings have created greater transparency into the financing of campaigns that allow election watchdog groups to monitor and track the flow of money to and by outside groups. These requirements also have generated an extensive new source of quantitative data for scholars to use. Because of the substantial increase in spending by outside groups, it is both timely and important to examine the influence of independent expenditures on election outcomes, political behavior, and fairness in the democratic process. To evaluate and understand the impact of this spending, researchers must be aware of the scope and limitations of the campaign finance data collected by the Federal Election Commission (FEC). This article provides scholars who would like to use FEC data to answer some of these questions with an introduction to the data source, a discussion of how other scholars have used the data, and a case study to generate guidance on the challenges and potential solutions associated with accessing and analyzing these data.