Man pages for fixest
Fast Fixed-Effects Estimations

aggregate.fixestAggregates the values of DiD coefficients a la Sun and...
AIC.fixestAikake's an information criterion
as.dictTransforms a character string into a dictionary
as.list.fixest_multiTransforms a fixest_multi object into a list
base_didSample data for difference in difference
base_pubPublication data sample
base_staggSample data for staggered difference in difference
BIC.fixestBayesian information criterion
binBins the values of a variable (typically a factor)
bread.fixestExtracts the bread matrix from fixest objects
check_conv_feolsCheck the fixed-effects convergence of a 'feols' estimation
coef.fixestExtracts the coefficients from a 'fixest' estimation
coef.fixest_multiExtracts the coefficients of fixest_multi objects
coefplotPlots confidence intervals and point estimates
coeftableExtracts the coefficients table from an estimation
coeftable.defaultExtracts the coefficients table from an estimation
coeftable.fixestObtain various statistics from an estimation
coeftable.fixest_multiExtracts the coefficients tables from 'fixest_multi'...
collinearityCollinearity diagnostics for 'fixest' objects
confint.fixestConfidence interval for parameters estimated with 'fixest'
confint.fixest_multiConfidence intervals for 'fixest_multi' objects
degrees_freedomGets the degrees of freedom of a 'fixest' estimation
demeanCenters a set of variables around a set of factors
demeaning_algoControls the parameters of the demeaning procedure
deviance.fixestExtracts the deviance of a fixest estimation
df.residual.fixestResidual degrees-of-freedom for 'fixest' objects
did_meansTreated and control sample descriptives
dsbSimple and powerful string manipulation with the dot square...
emmeans_supportSupport for emmeans package
est_envEstimates a 'fixest' estimation from a 'fixest' environment
estfun.fixestExtracts the scores from a fixest estimation
etableEstimations table (export the results of multiples...
extralines_registerRegister 'extralines' macros to be used in 'etable'
fdimFormatted dimension
feglmFixed-effects GLM estimations
femlmFixed-effects maximum likelihood models
feNmlmFixed effects nonlinear maximum likelihood models
feolsFixed-effects OLS estimation
fitstatComputes fit statistics of fixest objects
fitstat_registerRegister custom fit statistics
fitted.fixestExtracts fitted values from a 'fixest' fit
fixef.fixestExtract the Fixed-Effects from a 'fixest' estimation.
fixef_reexportedFunctions exported from 'nlme' to implement 'fixest' methods
fixest_dataRetrieves the data set used for a 'fixest' estimation
fixest-packageFast and User-Friendly Fixed-Effects Estimations
fixest_startup_msgPermanently removes the fixest package startup message
formula.fixestExtract the formula of a 'fixest' fit
fultonFulton Fish Market data
getFixest_sscGets the default values for the small sample correction
hatvalues.fixestHat values for 'fixest' objects
iCreate, or interact variables with, factors
lLags a variable in a 'fixest' estimation
lag.formulaLags a variable using a formula
logLik.fixestExtracts the log-likelihood
model.matrix.fixestDesign matrix of a 'fixest' object
modelsExtracts the models tree from a 'fixest_multi' object
n_modelsGets the dimension of 'fixest_multi' objects
nobs.fixestExtracts the number of observations form a 'fixest' object
n_unikPrints the number of unique elements in a data set
obsExtracts the observations used for the estimation
osizeFormatted object size
panelConstructs a 'fixest' panel data base
plot.fixestplot methods for 'fixest' and 'fixest_multi' objects
plot.fixest.fixefDisplaying the most notable fixed-effects
predict.fixestPredict method for 'fixest' fits
print.fixestA print facility for 'fixest' objects.
print.fixest_fitstatPrint method for fit statistics of fixest estimations
print.fixest_multiPrint method for fixest_multi objects
print.fixest_vcovA print facility for the VCOVs from 'fixest' objects.
print.ssc_typeMethod to print the type of small sample correction
r2R2s of 'fixest' models
refRefactors a variable
rep.fixestReplicates 'fixest' objects
resid.fixestExtracts residuals from a 'fixest' object
resid.fixest_multiExtracts the residuals from a 'fixest_multi' object
sample_dfRandomly draws observations from a data set
sandwich_reexportedFunctions exported from 'sandwich' to implement 'fixest'...
setFixest_coefplotSets the defaults of coefplot
setFixest_dictSets/gets the dictionary relabeling the variables
setFixest_estimationDefault arguments for fixest estimations
setFixest_fmlSets/gets formula macros
setFixest_multiSets properties of 'fixest_multi' objects
setFixest_notesSets/gets whether to display notes in 'fixest' estimation...
setFixest_nthreadsSets/gets the number of threads to use in 'fixest' functions
setFixest_sscSets the default values for the small sample correction
setFixest_vcovSets the default type of standard errors to be used
sigma.fixestResidual standard deviation of 'fixest' estimations
sparse_model_matrixDesign matrix of a 'fixest' object returned in sparse format
sscGoverns the small sample correction in 'fixest' VCOVs
stepwiseStepwise estimation tools
style.dfStyle of data.frames created by etable
style.texStyle definitions for Latex tables
sub-.fixest_multiSubsets a fixest_multi object
sub-.fixest_panelMethod to subselect from a 'fixest_panel'
sub-sub-.fixest_multiExtracts one element from a 'fixest_multi' object
summary.fixestSummary of a 'fixest' object. Computes different types of...
summary.fixest.fixefSummary method for fixed-effects coefficients
summary.fixest_multiSummary for fixest_multi objects
sunabSun and Abraham interactions
terms.fixestExtract the terms
to_integerFast transform of any type of vector(s) into an integer...
tradeTrade data sample
unpanelDissolves a 'fixest' panel
update.fixestUpdates a 'fixest' estimation
vcov_clusterClustered VCOV
vcov_conleyConley VCOV
vcov.fixestComputes the variance/covariance of a 'fixest' object
vcov_hacHAC VCOVs
vcov_heteroHeteroskedasticity-Robust VCOV
waldWald test of nullity of coefficients
weights.fixestExtracts the weights from a 'fixest' object
xpdExpands formula macros
fixest documentation built on March 18, 2026, 9:06 a.m.