William G. Cochran 
Planning and Analysis of Observational Studies 

Treats studies, primarily in human populations, that show casual effects of certain agents, procedures, treatment or programs. Deals with the difficulties that comparative observational studies have because of bias in their design and analysis. Systematically considers the many sources of bias and discusses how care in matching or adjustment of results can reduce the effects of bias in these investigations.

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Variation, Control, and Bias.

Statistical Introduction.

Preliminary Aspects of Planning.

Further Aspects of Planning.

Matching.

Adjustments in Analysis.

Simple Study Structures.

Index.

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William G Cochran was a prominent statistician. He was born in Scotland but spent most of his life in the United States. Cochran studied mathematics at the University of Glasgow and the University of Cambridge. He worked at Rothamsted Experimental Station from 1934 to 1939, when he moved to the United States.