Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

A Characterization of Optimal Designs for Observational Studies

Paul R. Rosenbaum
Journal of the Royal Statistical Society. Series B (Methodological)
Vol. 53, No. 3 (1991), pp. 597-610
Published by: Wiley for the Royal Statistical Society
Stable URL: http://www.jstor.org/stable/2345589
Page Count: 14
  • Read Online (Free)
  • Download ($29.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available

Abstract

Subclassification and matching are often used to adjust for covariates in observational studies. Here, the form of an `optimal' subclassification is determined, i.e. a subclassification which makes the treated and control subjects in the same subclass as similar as possible. This optimal form is simple, intuitive and quite practical, though it is rarely used. The optimal form has several consequences. First, it suggests that theoretical investigations may assume that observational studies have this form, for if they do not they may be changed to this form without a loss, and often with a gain. Second, in searching for an optimal subclassification, the search may be confined to subclassifications of this form, for one is sure to be optimal. Finally, it is shown that finding an optimal subclassification of this form may often be reduced to finding the minimum cost flow in a certain network, i.e. to a standard combinatorial optimization problem for which good algorithms exist.

Page Thumbnails

  • Thumbnail: Page 
597
    597
  • Thumbnail: Page 
598
    598
  • Thumbnail: Page 
599
    599
  • Thumbnail: Page 
600
    600
  • Thumbnail: Page 
601
    601
  • Thumbnail: Page 
602
    602
  • Thumbnail: Page 
603
    603
  • Thumbnail: Page 
604
    604
  • Thumbnail: Page 
605
    605
  • Thumbnail: Page 
606
    606
  • Thumbnail: Page 
607
    607
  • Thumbnail: Page 
608
    608
  • Thumbnail: Page 
609
    609
  • Thumbnail: Page 
610
    610