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Katherine Gray-Donald
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1988
Showing papers by "Katherine Gray-Donald published in 1988"
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Journal Article
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Causality inference in observational vs. experimental studies an empirical comparison
[...]
Katherine Gray-Donald
1
,
Michael S. Kramer
1
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Institutions (1)
McGill University
1
01 May
1988
-
American Journal of Epidemiology
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