The authors found that intelligence
supplanted education as the primary predictor of whether one took an
economist's typical point of view. Education moved into second place,
followed by party identification (Republican) and recent growth in
income. The correlation between the views of intelligent people and
professional economists offers "another reason to accept the
'economists are right, the public is wrong' interpretation" of
differences in opinion, these economists argue.
P.S. My first-hand experience with Christopher Shea, the author of the WSJ's "Week in Ideas" column, makes me regard him as especially trustworthy. How many other journalists in his position would double-check the accuracy of their write-up with the authors of the research?