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Welcome to


What's new:

  • 1 day Stata course on dealing with missing data, 1st Sep 2014, London, UK. See here for details
  • New book, Multiple Imputation and its Application by James Carpenter and Mike Kenward. The book's homepage, including data, software, exercises and errata is here.
  • New method and software for multiple imputation of partially observed covariates in the presence of non-linearities and interactions. More info here

This site exists

  • to support researchers from the social and medical sciences with the analysis of incomplete datasets, and
  • as a focus of statistical research.

If you are planning a study, or analysing a study with missing data, these guidelines (25Kb) are for you.

From time to time people have concerns about computational issues with multiple imputation; these comments may help.

We are grateful to (in time order)  ESRC Research Methods Programme, the ESRC Researcher Development Initiative, ESRC Research Fellowship RES-063-27-0257, ESRC Follow-On Funding scheme (grant RES-189-25-0103), MRC grant G0900724 and MRC fellowship MR/K02180X/1 for supporting the development and maintenance of this site.

We hope you find the site useful, and welcome your feedback.

James Carpenter, Jonathan Bartlett, and Mike Kenward