Abstract #300540

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JSM 2002 Abstract #300540
Activity Number: 309
Type: Contributed
Date/Time: Wednesday, August 14, 2002 : 10:30 AM to 12:20 PM
Sponsor: Section on Survey Research Methods*
Abstract - #300540
Title: A Practical Use for Instrument-Variable Calibration
Author(s): Phillip Kott*+
Affiliation(s): National Agricultural Statistics Service
Address: 7413 Tupelo Drive, Derwood, Maryland, 20855, USA
Keywords: Brewer weights ; Model unbiased ; Randomization consistent ; invariant
Abstract:

This talk describes a simple scenario where defining an instrument variable is helpful for computing calibration weights (i.e., weights that satisfy specified calibration equations yet are asymptotically identical to the inverse selection probabilities). The implicit model is simple regression with an intercept. Unless there is an extremely unusual sample, the resulting calibration weights can not be less than unity. A generalization to calibration with multiple auxiliary variables is suggested.

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Revised March 2002