# Things you should know for Exam 2

## Randomization

- Understand why randomization is crucial for causal inference and counterfactuals
- Understand the process for analyzing a randomized controlled trial

**Crucial resources**:

- Readings, slides, and videos for randomization and matching
- Guide for RCTs
- Problem set 3
- Task 1 in problem set 8

## Matching and inverse probability weighting

- Understand the intuition behind matching and inverse probability weighting
- Understand the process for adjusting for confounders and closing backdoors with both matching and inverse probability weighting

**Crucial resources**:

- Readings, slides, and videos for randomization and matching
- Guide for matching and inverse probability weighting
- Problem set 3
- Task 2 in problem set 8

## Difference-in-difference

- Understand the intuition behind making causal inferences with difference-in-differences
- Understand the process for analyzing diff-in-diffs

**Crucial resources**:

- Readings, slides, and videos for diff-in-diff
- Guide for diff-in-diff
- Problem set 4
- Problem set 5
- Task 3 in problem set 8

## Regression discontinuity

- Understand the intuition behind making causal inferences with regression discontinuity
- Understand the process for analyzing regression discontinuities, both
and*fuzzy**sharp* - Understand the difference between ATE and LATE

**Crucial resources**:

## Instrumental variables

- Understand the intuition behind using instruments for causal inference
- Understand the three characteristics of a good instrument
- Understand the process for analyzing data with instrumental variables and 2SLS
- Understand the difference between ATE and LATE

**Crucial resources**:

- Readings, slides, and videos for instrumental variables I
- Readings, slides, and videos for instrumental variables II
- Guide for instrumental variables
- Problem set 7
- Task 5 in problem set 8