▁D iver gence " ▁in ▁income ▁distribution , ▁as ▁does ▁econom ist ▁David ▁Card . ▁ ▁While ▁imm igration ▁was ▁found ▁to ▁have ▁slightly ▁de pressed ▁the ▁w ages ▁of ▁the ▁least ▁sk illed ▁and ▁least ▁educated ▁American ▁workers , ▁it ▁doesn ' t ▁explain ▁rising ▁inequality ▁among ▁high ▁school ▁and ▁college ▁gradu ates . ▁Sch ol ars ▁such ▁as ▁political ▁scient ists ▁Jacob ▁S . ▁H acker , ▁Paul ▁Pi erson , ▁Larry ▁Bart els ▁and ▁Nathan ▁Kelly , ▁and ▁econom ist ▁Tim othy ▁S me eding ▁question ▁the ▁explanation ▁of ▁educational ▁att ain ment ▁and ▁work place ▁skills ▁point ▁out ▁that ▁other ▁countries ▁with ▁similar ▁education ▁levels ▁and ▁econom ies ▁have ▁not ▁gone ▁the ▁way ▁of ▁the ▁US , ▁and ▁that ▁the ▁concentration ▁of ▁income ▁in ▁the ▁US ▁hasn ' t ▁followed ▁a ▁pattern ▁of ▁" the ▁ 2 9 % ▁of ▁Americans ▁with ▁college ▁degrees ▁pulling ▁away " ▁from ▁those ▁who ▁have ▁less ▁education . ▁ ▁W age ▁the ft ▁A ▁September ▁ 2 0 1 4 ▁report ▁by ▁the ▁Econom ic ▁Policy ▁Institute ▁claims ▁w age ▁the ft ▁is ▁also ▁responsible ▁for ▁ex ac erb ating ▁income ▁inequality : ▁" Sur vey ▁evidence ▁suggests ▁that ▁w age ▁the ft ▁is ▁w ides p read ▁and ▁costs ▁workers ▁bill ions ▁of ▁dollars ▁a ▁year , ▁a ▁transfer ▁from ▁low - in come ▁employees ▁to ▁business ▁own ers ▁that ▁w ors ens ▁income ▁inequality , ▁hur ts ▁workers ▁and ▁their ▁families , ▁and ▁dam ages ▁the ▁sense ▁of ▁fair ness ▁and