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The Choice of Variables in Observational Studies

D. R. Cox and E. J. Snell
Journal of the Royal Statistical Society. Series C (Applied Statistics)
Vol. 23, No. 1 (1974), pp. 51-59
Published by: Wiley for the Royal Statistical Society
DOI: 10.2307/2347053
Stable URL: http://www.jstor.org/stable/2347053
Page Count: 9
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The Choice of Variables in Observational Studies
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Abstract

A review is given of considerations affecting the choice of explanatory variables in observational studies. Aspects of both design and analysis are considered. In particular the choice of explanatory variables in multiple regression is discussed and some recommendations made.

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