Tyler Cowen suspects that Harvey Mansfield doesn't like economists. He points us to:
The Volokh Conspiracy - - : On Economists: Harvey Mansfield, writing in this month's New Criterion:
The building where I used to work was shared with economists, who, living the sort of life they describe, had no incentive to flush and sometimes failed to do so.
Don't feel sad, Tyler. Harvey Mansfield appears to like few people. Consider what Harvey Mansfield is supposed to have advised one professor visiting Harvard:
Keep your door closed. If you don't, undergraduates may wander in.
I think we're in pretty good company.