Mainstream Economists Unable To Discuss Economics

Over on Economics Job Market Rumors, an anonymous poster asks:

"Despite the neoclassicals admitting that the Post-Keynesians were right, why has the impact of heterogeneous capital on an economy left out of the macro models?"

It will not surprise me if he or she receives no coherent answer. I recently had a chance to skim the transcripts of David Colander's interviews with graduate students at the "best" economics departments in the United States. These are in his book The Making of an Economist Redux. The following phrases seem no connote nothing to such students: "Cambridge Capital Controversy", "Neoclassical Economics", and "Post Keynesian Economics". One student responded to a question about Joan Robinson by asking, "Who's that?" The best students seem to realize that they will have to get an education by themselves in their "spare" time after they receive their doctorate.