Debating what will trigger the next recession

Traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., June 28, 2018. - REUTERS

THE US economy has been growing since the last recession ended in June 2009, making this expansion the second-longest in the postwar era. But something inevitably brings all growth cycles to an end, causing the economy to stumble into recession.

Bloomberg Opinion columnists Conor Sen and Noah Smith recently met on line to discuss the potential sources of the next slump.