Robert Shiller of Yale University talks with EconTalk host Russ Roberts about the current housing mess and related financial market problems. Shiller argues that the decade-long run up in housing prices was a bubble where speculative fervor outweighed any economic fundamentals. He also discusses the genesis of the Case-Shiller housing price index and his idea for how it might be used to reduce risk in the mortgage market. Note: This podcast was recorded on September 5, 2008, days before Secretary of the Treasury Paulson put Fannie Mae and Freddie Mac into conservatorship.