David Warsh, "The Enormous Black Box" http://www.economicprincipals.com/issues/2009.12.13/841.html (2009)
“The Houses of Friedman and Samuelson disagreed on both methodology and policy. Nevertheless, the intellectual battles never encroached upon their personal respect for and friendship to each other.”
8.Paul Samuelson Knows How to Disagree Agreeably.
Ten Ways to Know Paul A. Samuelson (2006)
Help us to complete the source, original and additional information
Michael Szenberg 10
American economist 1934Related quotes

"Fooling the People as a Fine Art", La Follette's Magazine (April 1918)

“Love and friendship exclude each other.”

All three of the above are from "Future Quayle Quotes We Can Expect to Hear" by Al Jaffee, in MAD magazine, (October 1991), pp. 10–11
Cited in [John Kerry or George W. Bush Misquotes, http://www.snopes.com/quotes/candidate.asp, snopes.com, 2008-12-31, 2004-09-22, Barbara Mikkelson]
Misattributed

“Nevertheless we understood each other on all levels of madness…”
Source: On the Road