On Wed, 9 Jun 2004 08:04:40 -0400 (Eastern Daylight Time), Rod Little <[email protected]> wrote:
> Dear Paul: this is an interesting issue. For the specific case you > outline, the X1Y interaction should be included; a simple strategy would > be to simply stratify on X1 and impute Y and X2 separately in the two > strata. That strategy only applies in limited situations though. Rod > Rod, Could you elaborate, please, on the limited situations? I use that approach fairly routinely in intervention studies -- imputing separately by condition, to preserve treatment X initial status (or whatever) interactions. Thanks, Pat Malone -- Patrick S. Malone, Ph.D., Research Scholar Duke University Center for Child and Family Policy Durham, North Carolina, USA e-mail: [email protected] http://www.duke.edu/~malone/
