rddensity 3.0

Manipulation testing based on density discontinuity.

RDDENSITY

The rddensity package provides tools for manipulation testing around a cutoff using local polynomial density estimators, bandwidth selection, and density plotting.

• rddensity: implements density discontinuity testing.
• rdbwdensity: implements bandwidth selectors for manipulation testing.
• rdplotdensity: implements density plots around the cutoff.

See Cattaneo, Jansson and Ma (2018, 2020, 2022, 2024) for references.

Website: https://rdpackages.github.io/.

Source code: https://github.com/rdpackages/rddensity.

Authors

Matias D. Cattaneo, maintainer ([e-mail])

Michael Jansson ([e-mail])

Xinwei Ma ([e-mail])

Ricardo Masini, Python contributor ([e-mail])

Installation

To install/update use pip:

pip install rddensity

Usage

from rddensity import rddensity, rdbwdensity, rdplotdensity

• Replication: rddensity illustration, rdplotdensity illustration, senate data.

Dependencies

• numpy
• pandas
• scipy
• sympy
• plotnine
• lpdensity

References

For overviews and introductions, see the rdpackages website.

Software and Implementation

• Cattaneo, Jansson and Ma (2018): Manipulation Testing based on Density Discontinuity.
  Stata Journal 18(1): 234-261.

• Cattaneo, Jansson and Ma (2022): lpdensity: Local Polynomial Density Estimation and Inference.
  Journal of Statistical Software 101(2): 1-25.

Technical and Methodological

• Cattaneo, Jansson and Ma (2020): Simple Local Polynomial Density Estimators.
  Journal of the American Statistical Association 115(531): 1449-1455.
  Supplemental appendix.

• Cattaneo, Jansson and Ma (2024): Local Regression Distribution Estimators.
  Journal of Econometrics 240(2): 105074.
  Supplemental appendix.