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An introduction to linear regression and correlation
Edwards, Allen L., (1976)
Longitudinal data with serial correlation : a state-space approach
Jones, Richard H., (1993)
On the covariance structure of earnings and hours changes
Abowd, John M., (1986)
Measures of exports of the United States
Cowden, Dudley J., (1931)
Direct measurement of cyclical-trend
Cowden, Dudley J., (1961)
The perils of polynomials
Cowden, Dudley J., (1963)