It's another listener questions episode where we take on Darden Clarkewhat you want to know. On today's show... The 30-year fixed-rate mortgage. It's a cornerstone of the U.S. housing market, but not so much in the rest of the world. Why? We also look at upgrade auctions in the economy and a measure of inflation often overshadowed by the CPI ... PCE.

Special thanks to Professor Jonathan Williams of the University of North Carolina - Chapel Hill for talking to us about upgrade auctions.

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