An Improved Ems Algorithm For Back-Projection Of AIDS Incidence Data

Ian C. Marschner, Lyndsey F. Watson

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


An iterative procedure for estimating HIV incidence from AIDS incidence data is discussed. The approach, proposed by Becker et al. (1991), makes use of the EM algorithm combined with a smoothing step. In this paper we suggest a modification of the method, based on an alternative choice for the complete data model used to invoke the EM algorithm. It is found that this modification improves the stability and flexibility of the estimates, although it generally leads to slower convergence.

Original languageEnglish
Pages (from-to)1-20
Number of pages20
JournalJournal of Statistical Computation and Simulation
Issue number1-2
Publication statusPublished - 1 Aug 1994
Externally publishedYes


  • Back-projection
  • EM-algorithm
  • HIV/AIDS incidence
  • smoothing


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