11.3 But Am I That Wrong?

How do we increase certainty in answering a research question?

• Robustness test tries to disprove an assumption

  • DiD: do changes over time differ between treatment and control?

• Placebo test is a robustness test that tries to remove a bad assumption

  • Balance table of moderators (ch 14)

• Partial identification (ch 21)

  • Relaxes assumptions
  • Range of effect (instead of point estimates)