Claim: The Ludwig Institute for Shared Economic Prosperity includes individuals who are involuntarily working part-time in its calculation of the unemployment rate.
Verdict: Correct (95% confidence)
Explanation: According to the Ludwig Institute for Shared Economic Prosperity (LISEP), their True Rate of Unemployment (TRU) includes involuntarily part-time workers in its calculation (Source 3, Source 5, Source 7). These sources explicitly state that LISEP's TRU measures the 'functionally unemployed,' which encompasses the jobless and involuntarily part-time workers. This direct evidence confirms the claim that LISEP includes involuntarily part-time workers in its unemployment rate calculation.