Do Stronger Campaign Finance Disclosure Rules Reduce Corruption? A Critical Assessment of Transparency International’s CPI Report

Transparency International (TI) released its latest Corruption Perceptions Index (CPI) last month. A couple weeks back, in what has unfortunately become a necessary annual tradition, I posted a warning that one should not attach significance to short-term changes in any individual country’s CPI score. Today, I want to turn to another matter. In recent years, whenever TI releases a new edition of the CPI, the organization plays up certain themes or claims that, according to TI, the CPI reveals about corruption’s causes or impact. This year, one of the main themes in the report is the connection between corruption and campaign finance regulation. As this year’s lead TI press release on the CPI declares, “Analysis [of the data] shows that countries that perform well on the CPI also have stronger enforcement of campaign finance regulations.… Countries where campaign finance regulations are comprehensive and systematically enforced have an average score of 70 on the [100-point] CPI, whereas countries where such regulations either don’t exist or are so poorly enforced score an average of just 34 or 35 respectively.” (On the CPI, higher scores indicate lower perceived corruption.)

How did TI arrive at this conclusion? The report accompanying the CPI, and the longer research brief on this topic, give a bit more explanation. TI used another index, from the Varieties of Democracy (V-Dem) project, on “Disclosure of Campaign Donations.” The V-Dem index rates countries’ disclosure requirements for campaign donations on a 0-4 ordinal scale. TI took this scale, collapsed the 0 and 1 categories into one (allegedly for “data visualization purposes,” though I’m not sure what this means), and then calculated the CPI score for the countries in each of the four categories. The results:

  • For those countries with a V-Dem disclosure score of 0/1 (no disclosure requirements or requirements that are partial and rarely enforced), the average CPI score was 34.
  • For countries with a V-Dem score of 2 (uncertain enforcement of disclosure rules) the average CPI was 35.
  • For countries with a V-Dem score of 3 (disclosure requirements exist and are enforced, but may not be fully comprehensive), the average CPI score was 55.
  • Countries with a V-Dem score of 4 (comprehensive and fully enforced disclosure requirements) had an average CPI score of 70

That looks like pretty strong evidence that strong campaign finance disclosure rules are associated with lower corruption, and that’s certainly the story TI wants to tell. As the report puts it, “Unregulated flows of big money in politics … make public policy vulnerable to undue influence.” The research brief similarly explains, “Shedding light on who donates and how much, can expose the influence of money in politics and deter corruption and other pay-to-play situations.”

The claim may ultimately be correct, but on closer inspection, the evidence TI adduces in support of that claim is deeply problematic. Continue reading