1. Regression diagnostics: Identifying influential data and sources of collinearity;Belsley,1980
2. The Lagrange multiplier test and its applications to model specification in econometrics;Breusch;Review of Economic Studies,1980
3. Properties of ordinary and weighted least square estimators of regression coefficients for two-stage samples;Campbell,1977
4. Error components in grouped data: Why it's never worth weighting;Dickens,1985
5. Pooled cross-sectional and time series data: A survey of current statistical methodology;Dielman;The American Statistician,1983