SAEE permits careful comparison of general public and economists, holding all other variables constant. Enormous difference in average beliefs revealed by huge coefficients on Econ dummy. Controlling for self-serving bias only mildly reduces the size of the Econ coefficient. Controlling for ideological bias if anything magnifies the size of the Econ coefficient. Controlling for self-serving bias, ideological bias, demographics, and education, large Econ coefficient persists.
Education is also very important however.
Errors of the economically illiterate are systematic, not random.