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Leveraging PyFixest for High-Cardinality Marketplace Modeling at Instacart

Instacart Tech · published 29 June 2026

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https://lrberge.github.io/fixest/
lrberge.github.io
https://pyfixest.org/pyfixest.html
pyfixest.org
https://blogs.iq.harvard.edu/violations_of_s
blogs.iq.harvard.edu
https://tech.instacart.com/it-all-depends-4bb7b22e854b
tech.instacart.com
https://www.statsmodels.org/dev/generated/statsmodels.regression.linear_model.OLS.fit.html
statsmodels.org
https://en.wikipedia.org/wiki/Moore%E2%80%93Penrose_inverse
en.wikipedia.org
https://en.wikipedia.org/wiki/Singular_value_decomposition
en.wikipedia.org
https://github.com/scikit-learn/scikit-learn/blob/main/sklearn/linear_model/_base.py
github.com
https://en.wikipedia.org/wiki/Stochastic_gradient_descent
en.wikipedia.org
https://en.wikipedia.org/wiki/Frisch%E2%80%93Waugh%E2%80%93Lovell_theorem
en.wikipedia.org
https://en.wikipedia.org/wiki/Projections_onto_convex_sets
en.wikipedia.org
https://en.wikipedia.org/wiki/Gauss%E2%80%93Seidel_method
en.wikipedia.org
https://lrberge.github.io/fixest/reference/demeaning_algo.html
lrberge.github.io
https://github.com/py-econometrics/pyfixest/blob/master/pyfixest/estimation/api/feols.py
github.com
https://numba.pydata.org/
numba.pydata.org
https://cupy.dev/
cupy.dev
https://github.com/jax-ml/jax
github.com
https://github.com/py-econometrics/within
github.com
https://www.statsmodels.org/stable/mixed_linear.html
statsmodels.org
https://scikit-learn.org/stable/modules/generated/sklearn.linear_model.LinearRegression.html
scikit-learn.org
https://docs.scipy.org/doc/scipy/reference/generated/scipy.sparse.linalg.lsqr.html
docs.scipy.org
Leveraging PyFixest for High-Cardinality Marketplace Modeling at Instacart Read at the source ↗
tech.instacart.com
https://doi.org/10.48550/arXiv.2601.21749
doi.org
https://doi.org/10.2307/1907330
doi.org
https://doi.org/10.1016/j.csda.2013.03.024
doi.org
https://doi.org/10.1177/1536867X1101000406
doi.org
https://doi.org/10.1080/01621459.1963.10480682
doi.org
https://github.com/py-econometrics/pyfixest
github.com
https://doi.org/10.1007/BF00140865
doi.org
http://www.jstor.org/stable/j.ctt1bc543b
jstor.org