Conversation so far:
Can you provide some background information on Irving Fisher?
Fisher was born in Saugerties, New York. His father was a teacher and a Congregational minister, who raised his son to believe he must be a useful member of society
Was Irving Fisher married?
In 1893, he married Margaret Hazard, a granddaughter of Rhode Island industrialist and social reformer Rowland G. Hazard.

Question: What kind of work did he do?
Self-contained rewrite: What kind of work did Irving Fisher do?