Sample Selection Bias as a Specification Error
James J. Heckman (Jan. ,1979)
Specification Tests in Econometrics
J. A. Hausman (Nov.,1978)
Co-Integration and Error Correction:Representation,Estimation,and Testing
Robert F. Engle ; C. W. J. Granger (Mar.,1987)
A Simple,Positive Semi-Definite,Heteroskedasticity and Autocorrelation Consistent Covariance Matrix
Whitney K. Newey ; Kenneth D. West (May.,1987)
A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity
Halbert White (May.,1980)
