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Behavioral Economics

City University of New York (CUNY)

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Selection bias

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How Bad Can Good Data Really Be?, William (Bill) H. Williams May 1978

How Bad Can Good Data Really Be?, William (Bill) H. Williams

Publications and Research

Bias has different sources. Measurement errors create "bad" data and biased estimates. But selection biases occur even with "good" data and can be both subtle and large in magnitude.