"It gives them a significant opportunity to generate community support, to get attention to embarrass the university," Professor Clark said.

But Professor Clark also noted that history shows there has always existed a "basic fundamental need for a countervailing power to employers."

He studied analytical chemistry under Professor Clark, and assisted him in the preparations for his lectures.

"There's an old theory in industrial relations that two main factors determine who has the upper hand," Professor Clark said.

Lifting the ban, however, has reciprocal advantages, Professor Clark said in a recent interview.

For some, like Professor Clark, the events in Washington were less of a show, more of a family tragedy.

Professor Clark's papers and books deal with the philosophy of mind and he is considered a leading scientist in mind extension.

Professor Clark's pessimistic view is that most forms of policy advice or financial aid do not solve the problem of economic development.

A simple example from Professor Clark shows the importance of labor in economic development.

Professor Clark's idea-rich book may just prove to be the next blockbuster in economics.