In New York they ask, how much is he worth?

"In Boston they ask, how much does he know? In New York, how much is he worth? In Philadelphia, who were his parents?" This line has been credited to Mark Twain.

January 1895, North American Review, "What Paul Bourget Thinks of Us" by Mark Twain, pg. 48:
HE reports the American joke correctly. In Boston they ask, How much does he know? in New York, How much is he worth? in Philadelphia, Who were his parents?