# PyFixest

> Fast high-dimensional fixed effects regression in Python, closely mirroring the syntax of the R package fixest.

## Pages

- [skills](skills.llms.md)
- [difficult-fixed-effects](explanation/difficult-fixed-effects.llms.md)
- [testing](developer/testing.llms.md)
- [fixest-compatibility](developer/fixest-compatibility.llms.md)
- [acknowledgements](acknowledgements.llms.md)
- [Quantile Regression](tutorials/quantile-regression.llms.md)
- [OLS with Fixed Effects](tutorials/ols-fixed-effects.llms.md)
- [Tutorials](tutorials/index.llms.md)
- [Difference-in-Differences Estimation](tutorials/difference-in-differences.llms.md)
- [Replicating Examples from "The Effect"](textbook-replications/replicating-the-effect.llms.md)
- [Textbook Replications](textbook-replications/index.llms.md)
- [utils.utils.ssc](reference/utils.utils.ssc.llms.md)
- [utils.utils.get_data](reference/utils.utils.get_data.llms.md)
- [utils.dgps.get_twin_data](reference/utils.dgps.get_twin_data.llms.md)
- [utils.dgps.get_ivf_data](reference/utils.dgps.get_ivf_data.llms.md)
- [utils.dgps.get_bartik_data](reference/utils.dgps.get_bartik_data.llms.md)
- [report.qplot](reference/report.qplot.llms.md)
- [report.etable](reference/report.etable.llms.md)
- [index](reference/index.llms.md)
- [estimation.post_estimation.savi.optimal_mixture_precision](reference/estimation.post_estimation.savi.optimal_mixture_precision.llms.md)
- [estimation.post_estimation.multcomp.rwolf](reference/estimation.post_estimation.multcomp.rwolf.llms.md)
- [estimation.models.fepois_.Fepois](reference/estimation.models.fepois_.Fepois.llms.md)
- [estimation.models.feols_.Feols.wald_test](reference/estimation.models.feols_.Feols.wald_test.llms.md)
- [estimation.models.feols_.Feols.update](reference/estimation.models.feols_.Feols.update.llms.md)
- [estimation.models.feols_.Feols.tidy](reference/estimation.models.feols_.Feols.tidy.llms.md)
- [estimation.models.feols_.Feols.ritest](reference/estimation.models.feols_.Feols.ritest.llms.md)
- [estimation.models.feols_.Feols](reference/estimation.models.feols_.Feols.llms.md)
- [estimation.models.feols_.Feols.pvalue](reference/estimation.models.feols_.Feols.pvalue.llms.md)
- [estimation.models.feols_.Feols.get_performance](reference/estimation.models.feols_.Feols.get_performance.llms.md)
- [estimation.models.feols_.Feols.evalue](reference/estimation.models.feols_.Feols.evalue.llms.md)
- [estimation.models.feols_.Feols.confint](reference/estimation.models.feols_.Feols.confint.llms.md)
- [estimation.models.feols_.Feols.ccv](reference/estimation.models.feols_.Feols.ccv.llms.md)
- [estimation.models.feglm_.Feglm](reference/estimation.models.feglm_.Feglm.llms.md)
- [estimation.formula.parse.Formula](reference/estimation.formula.parse.Formula.llms.md)
- [estimation.formula.model_matrix.ModelMatrix](reference/estimation.formula.model_matrix.ModelMatrix.llms.md)
- [estimation.api.quantreg.quantreg](reference/estimation.api.quantreg.quantreg.llms.md)
- [estimation.api.feols.feols](reference/estimation.api.feols.feols.llms.md)
- [estimation.FixestMulti_.FixestMulti](reference/estimation.FixestMulti_.FixestMulti.llms.md)
- [did.saturated_twfe.SaturatedEventStudy](reference/did.saturated_twfe.SaturatedEventStudy.llms.md)
- [did.estimation.event_study](reference/did.estimation.event_study.llms.md)
- [demeaners.MapDemeaner](reference/demeaners.MapDemeaner.llms.md)
- [demeaners.BaseDemeaner](reference/demeaners.BaseDemeaner.llms.md)
- [core.demean.Preconditioner](reference/core.demean.Preconditioner.llms.md)
- [Translating Stata to PyFixest](how-to/stata-2-pyfixest.llms.md)
- [Variance Reduction in AB Tests](how-to/panel_variance_reduction.llms.md)
- [Guides](how-to/index.llms.md)
- [When to Use Anytime-Valid Inference](how-to/anytime-valid-inference.llms.md)
- [On Small Sample Corrections](explanation/ssc.llms.md)
- [Contributing](contributing.llms.md)
- [changelog](changelog.llms.md)
- [Does `PyFixest` match `fixest`?](explanation/compare-fixest-pyfixest.llms.md)
- [A first Regression with PyFixest](getting-started.llms.md)
- [Choosing a Demeaner Backend](how-to/demeaner-backends.llms.md)
- [Marginal Effects and Hypothesis Tests via `marginaleffects`](how-to/marginaleffects.llms.md)
- [How much do Covariates Matter?](how-to/regression_decomposition.llms.md)
- [PyFixest](index.llms.md)
- [core.detect_singletons.detect_singletons](reference/core.detect_singletons.detect_singletons.llms.md)
- [demeaners.LsmrDemeaner](reference/demeaners.LsmrDemeaner.llms.md)
- [did.estimation.did2s](reference/did.estimation.did2s.llms.md)
- [did.estimation.lpdid](reference/did.estimation.lpdid.llms.md)
- [did.visualize.panelview](reference/did.visualize.panelview.llms.md)
- [estimation.api.feglm.feglm](reference/estimation.api.feglm.feglm.llms.md)
- [estimation.api.fepois.fepois](reference/estimation.api.fepois.fepois.llms.md)
- [estimation.demean](reference/estimation.demean.llms.md)
- [estimation.formula.model_matrix.create_model_matrix](reference/estimation.formula.model_matrix.create_model_matrix.llms.md)
- [estimation.formula.transforms.factor_interaction.factor_interaction](reference/estimation.formula.transforms.factor_interaction.factor_interaction.llms.md)
- [estimation.models.feiv_.Feiv](reference/estimation.models.feiv_.Feiv.llms.md)
- [estimation.models.feols_.Feols.coef](reference/estimation.models.feols_.Feols.coef.llms.md)
- [estimation.models.feols_.Feols.decompose](reference/estimation.models.feols_.Feols.decompose.llms.md)
- [estimation.models.feols_.Feols.fixef](reference/estimation.models.feols_.Feols.fixef.llms.md)
- [estimation.models.feols_.Feols.predict](reference/estimation.models.feols_.Feols.predict.llms.md)
- [estimation.models.feols_.Feols.pvalue_savi](reference/estimation.models.feols_.Feols.pvalue_savi.llms.md)
- [estimation.models.feols_.Feols.resid](reference/estimation.models.feols_.Feols.resid.llms.md)
- [estimation.models.feols_.Feols.se](reference/estimation.models.feols_.Feols.se.llms.md)
- [estimation.models.feols_.Feols.tstat](reference/estimation.models.feols_.Feols.tstat.llms.md)
- [estimation.models.feols_.Feols.vcov](reference/estimation.models.feols_.Feols.vcov.llms.md)
- [estimation.models.feols_.Feols.wildboottest](reference/estimation.models.feols_.Feols.wildboottest.llms.md)
- [estimation.post_estimation.multcomp.bonferroni](reference/estimation.post_estimation.multcomp.bonferroni.llms.md)
- [estimation.post_estimation.multcomp.wyoung](reference/estimation.post_estimation.multcomp.wyoung.llms.md)
- [estimation.quantreg.quantreg_.Quantreg](reference/estimation.quantreg.quantreg_.Quantreg.llms.md)
- [report.coefplot](reference/report.coefplot.llms.md)
- [report.iplot](reference/report.iplot.llms.md)
- [report.summary](reference/report.summary.llms.md)
- [utils.dgps.get_encouragement_data](reference/utils.dgps.get_encouragement_data.llms.md)
- [utils.dgps.get_motherhood_event_study_data](reference/utils.dgps.get_motherhood_event_study_data.llms.md)
- [utils.dgps.get_worker_panel](reference/utils.dgps.get_worker_panel.llms.md)
- [utils.utils.get_ssc](reference/utils.utils.get_ssc.llms.md)
- [Causal Inference for the Brave and True](textbook-replications/brave_true.llms.md)
- [The Mixtape with PyFixest](textbook-replications/mixtape.llms.md)
- [Learning Econometrics with PyFixest](textbook-replications/resources.llms.md)
- [Formula Syntax](tutorials/formula-syntax.llms.md)
- [Instrumental Variables](tutorials/instrumental-variables.llms.md)
- [Poisson & GLMs](tutorials/poisson-glm.llms.md)
- [Regression Tables](tutorials/regression-tables.llms.md)
- [architecture](developer/architecture.llms.md)
- [git-and-pr-style](developer/git-and-pr-style.llms.md)
- [blog-posts](explanation/blog-posts.llms.md)
- [pyfixest](pyfixest.llms.md)