3Camba-Mendez .G.An Automatic Leading Indicator of Economic Activity:Forecasting GDP Growth for European Countries[J].Econometrics Journal, 2001 (4) : S56-S90.
4Qin · D.Automatic Leading Indicators versus Macro econometric Structural Models:A Comparison of Inflation and GDP Growth Forecasting[J].International Journal of Forecasting, 2008 (24) : 399-413.
5Bai.J,Ng.S. Determining the number of primitive shocks in factor models[J].Journal of Business & Economic Statistics, 2007 (25) : 52-60.
6Onatski.A.Detennining the number of factors frum empirical distribution of eigenvalues [R]. Department of Economics Discussion Paper Series,Columbia University,2005.
