Estimate two way fixed effect labor models
Project description
PyTwoWay
PyTwoWay is the Python package associated with the following paper:
“How Much Should we Trust Estimates of Firm Effects and Worker Sorting?” by Stéphane Bonhomme, Kerstin Holzheu, Thibaut Lamadon, Elena Manresa, Magne Mogstad, and Bradley Setzler. No. w27368. National Bureau of Economic Research, 2020.
The package provides implementations for a series of estimators for models with two sided heterogeneity:
two way fixed effect estimator as proposed by Abowd Kramarz and Margolis
homoskedastic bias correction as in Andrews et al
heteroskedastic correction as in KSS (TBD)
a group fixed estimator as in BLM
a group correlated random effect as presented in the main paper
If you want to give it a try, you can start the example notebook here: . This starts a fully interactive notebook with a simple example that generates data and runs the estimators.
The code is relatively efficient. Solving large sparse linear models relies on PyAMG. This is the code we use to estimate the different decompositions on US data.
The package provides a Python interface as well as an intuitive command line interface. Installation is handled by pip or Conda (TBD). The source of the package is available on GitHub at PyTwoWay. The online documentation is hosted here.
Quick Start
To install via pip, from the command line run:
pip install pytwoway
To run PyTwoWay via the command line interface, from the command line run:
pytw --my-config config.txt --fe --cre
Example config.txt:
data = file.csv filetype = csv col_dict = "{'i': 'your_workerid_col', 'j': 'your_firmid_col', 'y': 'your_compensation_col', 't': 'your_year_col'}"
Citation
Please use following citation to cite PyTwoWay in academic publications:
Bibtex entry:
@techreport{bhlmms2020, title={How Much Should We Trust Estimates of Firm Effects and Worker Sorting?}, author={Bonhomme, St{\'e}phane and Holzheu, Kerstin and Lamadon, Thibaut and Manresa, Elena and Mogstad, Magne and Setzler, Bradley}, year={2020}, institution={National Bureau of Economic Research} }
Development
Easiest is to use poetry to set up a local environment:
poetry install poetry shell python -m pytest
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