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undidR

Difference-in-Differences with Unpoolable Data

A framework for estimating difference-in-differences with unpoolable data, based on Karim, Webb, Austin, and Strumpf (2025) <doi:10.48550/arXiv.2403.15910>. Supports common or staggered adoption, multiple groups, and the inclusion of covariates. Also computes p-values for the aggregate average treatment effect on the treated via the randomization inference procedure described in MacKinnon and Webb (2020) <doi:10.1016/j.jeconom.2020.04.024>.

README

# Example Data Files

These CSV files are all generated by undidR package functions.
The data processed by `undidR::undid_stage_two()` (the filled_diff.csv files and the trends_data.csv files) comes from the college enrollment and merit aid data from Conley and Taber (2011).
The original data is publicly available: https://economics.uwo.ca/people/conley_docs/code_to_download.html

## Data Description

The original data includes the following variables:
- `coll`: Binary indicator for college enrollment (outcome variable)
- `merit`: Binary indicator for merit program (treatment variable)
- `male`: Binary indicator for male students
- `black`: Binary indicator for Black students
- `asian`: Binary indicator for Asian students
- `year`: Year of observation
- `state`: State identifier

## Citation

If you use this data, please cite:

Conley, Timothy G., and Christopher R. Taber. "Inference with "difference in differences" with a small number of policy changes." The Review of Economics and Statistics 93.1 (2011): 113-125.

Karim, Sunny, Matthew D. Webb, Nichole Austin, and Erin Strumpf. "Difference-in-Differences with Unpoolable Data." arXiv preprint arXiv:2403.15910 (2024).

Versions across snapshots

VersionRepositoryFileSize
3.0.2 rolling linux/jammy R-4.5 undidR_3.0.2.tar.gz 507.5 KiB
3.0.2 rolling linux/noble R-4.5 undidR_3.0.2.tar.gz 507.3 KiB
3.0.2 rolling source/ R- undidR_3.0.2.tar.gz 466.2 KiB
3.0.2 latest linux/jammy R-4.5 undidR_3.0.2.tar.gz 507.5 KiB
3.0.2 latest linux/noble R-4.5 undidR_3.0.2.tar.gz 507.3 KiB
3.0.2 latest source/ R- undidR_3.0.2.tar.gz 466.2 KiB
3.0.2 2026-04-26 source/ R- undidR_3.0.2.tar.gz 466.2 KiB
3.0.2 2026-04-23 source/ R- undidR_3.0.2.tar.gz 466.2 KiB
3.0.2 2026-04-09 windows/windows R-4.5 undidR_3.0.2.zip 537.7 KiB
1.0.1 2025-04-20 source/ R- undidR_1.0.1.tar.gz 303.3 KiB

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