From Job Incidence Numbers in Social Security Disability Claims: A Case Study and Analysis by Kevin Liebkemann, 44 J. Nat’l Ass’n Admin. L. Judiciary 15 (2024) .
... The case survey results suggest that the SSA’s current vocational evidence system is broken in ways that can hurt disability claimants. Some variance in VE [Vocational Expert] job incidence number testimony may be reasonable. However, survey results document that VEs frequently gave markedly different national job incidence numbers for the same job around the same time, which indicates that the VE’s methodologies employed were inconsistent and thus unreliable. Further, study of cases involving other frequently cited DOT job titles could help determine how widespread this problem is. Some courts have already taken notice of such discrepancies regarding VE testimony of job incidence for other DOT titles. ...
SSA does not currently have adequate rules or enforcement in place to protect the public from the problem documented in the study data, namely VEs giving extremely disparate job incidence numbers for the same DOT title. The study data and case review found that SSA ALJs accepted those disparate numbers. The SSA’s Office of Inspector General that is charged with searching for and reporting systemic weaknesses in SSA programs has not yet issued any investigation reports on the reliability of VE methodologies for determining job incidence numbers. ...