Global Insight, the world's leading company for economic and financial analysis and forecasting, released the third quarter 2007 update of House Prices in America, the U.S. housing-valuation analysis, showing that prices for single-family homes declined for the first time since 1994, with California, Florida and Michigan accounting for the steepest losses. Prices fell at a 1% annualized rate during the quarter, though they were still up 1.8% year-over-year.