Yale economist and home price index co-creator Robert Shiller says he’s not sure where housing prices are headed, but he is worried about the broader economy. “I’m worried about a double-dip recession,” Shiller tells Reuters Insider, pointing to lingering problems with the economy, such as high long-term unemployment. “Something is not normal in this economy yet.” He adds that the probability of a double-dip is more than 50 percent. “I actually expect it,” he says.