Confounding and control
This paper deals both with the issues of confounding and of control, as the definition of a confounding factor is far from universal and there exist different methodological approaches, ex ante and ex post, for controlling for a confounding factor. In the first section the paper compares some definitions of a confounder given in the demographic and epidemiological literature with the definition of a confounder as a common cause of both treatment/exposure and response/outcome. In the second section, the paper examines confounder control from the data collection viewpoint and recalls the stratification approach for ex post control. The paper finally raises the issue of controlling for a common cause or for intervening variables, focusing in particular on latent confounders.
References listed on IDEAS
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- Joshua D. Angrist & Alan B. Krueger, 2001.
"Instrumental Variables and the Search for Identification: From Supply and Demand to Natural Experiments,"
Journal of Economic Perspectives,
American Economic Association, vol. 15(4), pages 69-85, Fall.
- Joshua Angrist & Alan B. Krueger, 2001. "Instrumental Variables and the Search for Identification: From Supply and Demand to Natural Experiments," NBER Working Papers 8456, National Bureau of Economic Research, Inc.
- Robert Moffitt, 2003. "Causal Analysis in Population Research: An Economist's Perspective," Population and Development Review, The Population Council, Inc., vol. 29(3), pages 448-458.
- J.D. Angrist & Guido W. Imbens & D.B. Rubin, 1993. "Identification of Causal Effects Using Instrumental Variables," NBER Technical Working Papers 0136, National Bureau of Economic Research, Inc.
- Herbert L. Smith, 2003. "Some Thoughts on Causation as It Relates to Demography and Population Studies," Population and Development Review, The Population Council, Inc., vol. 29(3), pages 459-469.
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