TY  - BOOK
AU  - Welsch,Roy E.
AU  - Kuh,Edwin
ED  - National Bureau of Economic Research.
TI  - The Variances of Regression Coefficient Estimates Using Aggregate Data
T2  - NBER working paper series
PY  - 1974///
CY  - Cambridge, Mass.
PB  - National Bureau of Economic Research
N1  - October 1974; Hardcopy version available to institutional subscribers
N2  - This paper considers the effect of aggregation on the variance of parameter estimates for a linear regression model with random coefficients and an additive error term. Aggregate and microvariances are compared and measures of relative efficiency are introduced. Necessary conditions for efficient aggregation procedures are obtained from the Theil aggregation weights and from measures of synchronization related to the work of Grunfeld and Griliches
UR  - https://www.nber.org/papers/w0060
UR  - http://dx.doi.org/10.3386/w0060
ER  -