In particular, the BLS in the US reports 6 different measures of unemployment, U-1 through U-6, each measuring something slightly different. LISEP adds another to the bunch; this is their operationalization:
> LISEP’s definition of “True” employment or unemployment accepts the U-3 rate for comparison purposes, but modifies it by adopting two important stipulations. The first stipulation deals with the workweek. To be employed for the purposes of LISEP’s true employment concept, an individual must either have a full-time job (35+ hours per week) or have a part-time job but no desire to be full-time (e.g., students). The second stipulation is that an individual must earn at least $20,000 annually. This annual wage is adjusted for inflation, calculated in January 2020 dollars.
The white paper gives their rationale for the $20,000 cutoff. The "true" name here is marketing, which might honestly be the right play here. My gut says that we already have better statistics than TRU but they smell dry and academic. I would be interested to hear more about their political strategy and philosophy.
FWIW, the institute looks to be chaired by https://en.wikipedia.org/wiki/Eugene_Ludwig.