3D. Belsley, E. Kuh and R. Whelsch .《Regression Diagnosis》( New York: Wiley, 1980).
4J. Bradford Delong,Lawrence H * Summers. Equipment Investment and Economic Growth, How Robust is the Nexus? [C]. Brookings Papers on Economic Activity, 1992:155-199.
5Levine Ross, Renelt David. A Sensitivity Analysis of Cross- Country Growth Regressions [J ]. American Economic Review, 1992,82:942-63.