Evidence-based Policy for HIV/AIDS Interventions: Questions of External Validity, or Relevance for Use


  • The author is grateful to the referees and the editors for their helpful comments on an earlier version of this article. He is also grateful to the members of the Evidence Group in the Centre for Philosophy of Natural and Social Science, LSE — Nancy Cartwright, Sophia Efstathiou, Damien Fennell, Sabina Leonelli, Erika Mattila, Eleonora Montuschi, Eileen Munro and Michael Redmayne — for ongoing discussions in this area.