However, while such role - model effects are widely believed to be important, there is actually little direct empirical evidence that they exist. (educationnext.org)
Additionally, the Department openly and publicly admitted the flaws in its analysis regarding the supposed misbehavior by insurance agents and acknowledged that «direct empirical evidence about the frequency of such misbehavior is limited.» (insurancenewsnet.com)
Many economists suspect that downward nominal wage rigidities in ongoing labor contracts are an important source of employment fluctuations over the business cycle but there is little direct empirical evidence on this conjecture. (econbiz.de)