Quantitative · 10 lessons · Free walkthrough

Difference-in-Differences

Case study: Did Taylor Swift's Eras Tour boost local economies?

Learn causal inference with difference-in-differences by estimating the economic impact of a tour stop on its host county: treatment, control, parallel trends, and all.

The walkthrough

Each step pairs a short video with the agent you use to do it yourself.

1. 1

   Find and frame your question

   Turn a rough interest into a sharp, answerable research question and hypothesis.

   Do this step in Topic Generator
2. 2

   Write the introduction

   Open with the hook, the gap, and your contribution, then a complete, LaTeX-ready intro.

   Do this step in Draft Introduction
3. 3

   Gather the literature

   Surface the key papers you actually need to read for this question and method.

   Do this step in Fetch Literature
4. 4

   Annotate what you read

   Turn dense papers into structured notes you can cite and synthesize.

   Do this step in Annotate Literature
5. 5

   Set the background & context

   Establish the facts, setting, and stakes a reader needs before the argument.

   Do this step in Background & Context
6. 6

   Write the literature review

   Weave prior work into one coherent argument that motivates your study.

   Do this step in Literature Review
7. 7

   Build your theory & hypotheses

   Make the framework explicit and sharpen the predictions you'll test.

   Do this step in Theory
8. 8

   Data & methodology

   Describe your data and defend the method, the heart of the empirical claim.

   Do this step in Data & Methodology
9. 9

   Run and present results

   Estimate, report, and read the results clearly and honestly.

   Do this step in Results
10. 10

    Discussion & conclusion

    Interpret the findings, own the limits, and land the contribution.

    Do this step in Discussion & Conclusion