A Estrella, FS Mishkin (1995). „Predicting U.S. Recessions: Financial Variables as Leading Indicators”. Review of Economics and Statistics (MIT Press) 80: 45–61. DOI:10.1162/003465398557320.
„From the subprime to the terrigenous: Recession begins at home”. Land Values Research Group. 2. 6. 2009. »A downturn in the property market, especially in turnover (sales) of properties, is a leading indicator of recession, with a lead time of up to 9 quarters...«