The delicate and intricate pattern of competition and cooperation in the economic behavior of the hundreds of thousands of citizens of Stockholm offers a challenge to the economist that is perhaps as complex as the challenges of the physicist and the chemist.

My main graduate training was received at the University of Chicago from which I received the Ph.D. in 1938.

My teaching began in 1936 at Iowa State College where T. W. Schultz was the department chairman.

I met my wife, Margaret L. Mack, at the University of Chicago. We were married in 1936. She died in 1970.

I started working and publishing in price theory by 1938.

All great economists are tall. There are two exceptions: John Kenneth Galbraith and Milton Friedman.

In 1958, I came to Chicago where I have remained.