Difference-in-differences I

Content for Monday, October 10, 2022

Readings

• Chapter 7 in Impact Evaluation in Practice (Gertler et al. 2016)
• Chapter 18 in The Effect (Huntington-Klein 2021)

Slides

The slides for today’s lesson are available online as an HTML file. Use the buttons below to open the slides either as an interactive website or as a static PDF (for printing or storing for later). You can also click in the slides below and navigate through them with your left and right arrow keys.

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Introduction

Quasi-experiments

Interactions & regression

Two wrongs make a right

Diff-in-diff assumptions

Tip

Fun fact: If you type ? (or shift + /) while going through the slides, you can see a list of special slide-specific commands.

Videos

Videos for each section of the lecture are available at this YouTube playlist.

• Introduction
• Quasi-experiments
• Interactions & regression
• Two wrongs make a right
• Diff-in-diff assumptions

You can also watch the playlist (and skip around to different sections) here:

In-class stuff

Here are all the materials we’ll use in class:

• Session 8 FAQ slides (PDF)
• Session 8 R code (on RStudio.cloud)

References

Gertler, Paul J., Sebastian Martinez, Patrick Premand, Laura B. Rawlings, and Christel M. J. Vermeersch. 2016. Impact Evaluation in Practice. 2nd ed. Inter-American Development Bank; World Bank. https://openknowledge.worldbank.org/handle/10986/25030.

Huntington-Klein, Nick. 2021. The Effect: An Introduction to Research Design and Causality. Boca Raton, Florida: Chapman and Hall / CRC. https://theeffectbook.net/.