Principal Stratification Tool

  1. Start → Calculating Bounds for Principal Causal Effects: Interactive Analysis Tool
  2. Design Requirements
  3. Identify the Principal Strata for your Study
  4. Use Substantive Assumptions to Restrict the Number of Strata of Interest for these Analyses
  5. Determining Proportions of Subgroups using Observed Quantities
  6. Solving for Proportions that are not Directly Observed
  7. Solving for Means under Treatment and Control
  8. Applying the Exclusion Restriction
  9. Solving for the Remaining Means
  10. Calculating the Bounds and Estimating Ranges of Impact
  11. Next Steps

Identify the Principal Strata for Your Study

Please fill in the following information needed to estimate bounds for principal causes effects

1. What are the post-randomization actions / behaviors that are of interest in your study?

The first step is to identify the post-randomization activities that you want to examine for this study. These are behaviors and actions that might be possible for study participants under both assignment to the treatment condition and under assignment to the control condition. In the Miratrix et al. 2016 study of Early College High schools, researchers focused on enrollment in different types of high schools; students could enroll at an Early College High schools, high-quality public schools or low-quality public schools.

This tool is designed to support the calculation of bounds for principal causal effects for two, three or four conditions defined by post-randomization activities or behaviors. Please indicate the number of post-randomization actions / behaviors for which you wish to estimate bounds in this study.