Lopez and Peters (2010) use a sample of city and county governments to highlight that municipalities employing Big 4 audit firms are more likely to disclose internal control weaknesses. Therefore, we set an indicator variable (BIG 4 AUDITOR) to 1 if the municipality engages a Big 4 auditor for more than half of the sample period (0 otherwise). We also consider the potential impact from auditor turnover, setting AUDITOR SWITCH equal to 1 if municipality switched auditors during the sample period. Next, given that auditors can classify certain audits as low risk as part of the A-133 audit process (thereby decreasing the percentage of program expenditures that need to be audited), we include a separate variable titled LOW RISK AUDIT to consider audits deemed to require less audit effort.