academic article

• The Importance of Making Assumptions in Bias Analysis..  Epidemiology (Cambridge, Mass.).  32:617-624. 2021
• Bounding causal effects under uncontrolled confounding using counterfactuals..  Epidemiology (Cambridge, Mass.).  16:548-55. 2005
• Improved estimation of controlled direct effects in the presence of unmeasured confounding of intermediate variables..  Statistics in medicine.  24:1683-702. 2005