fixest (version 0.12.1)

check_conv_feols: Check the fixed-effects convergence of a feols estimation

Description

Checks the convergence of a feols estimation by computing the first-order conditions of all fixed-effects (all should be close to 0)

Usage

check_conv_feols(x)
# S3 method for fixest_check_conv
summary(object, type = "short", ...)

Value

It returns a list of N elements, N being the number of variables in the estimation (dependent variable + explanatory variables +, if IV, endogenous variables and instruments). For each variable, all the first-order conditions for each fixed-effect are returned.

Arguments

x

A feols estimation that should contain fixed-effects.

object

An object returned by check_conv_feols.

type

Either "short" (default) or "detail". If "short", only the maximum absolute FOC are displayed, otherwise the 2 smallest and the 2 largest FOC are reported for each fixed-effect and each variable.

...

Not currently used.

Note that this function first re-demeans the variables, thus possibly incurring some extra computation time.

Examples

base = setNames(iris, c("y", "x1", "x2", "x3", "species"))
base$FE = rep(1:30, 5)

# one estimation with fixed-effects + varying slopes
est = feols(y ~ x1 | species[x2] + FE[x3], base)

# Checking the convergence
conv = check_conv_feols(est)

# We can check that al values are close to 0
summary(conv)

summary(conv, "detail")