% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/est_amg.R
\name{amg_estimator}
\alias{amg_estimator}
\title{Augmented Mean Group (AMG) Estimator Internals}
\description{
Internal helpers for the Augmented Mean Group (AMG) estimator of
Eberhardt & Teal (2010) and Bond & Eberhardt (2013). AMG accounts for
cross-sectional dependence via a two-step procedure:
}
\details{
\enumerate{
\item Fit a pooled first-difference regression of \eqn{\Delta y_{it}}
on \eqn{\Delta x_{it}} augmented with \eqn{T-1} time dummies.
\item Extract the time-dummy coefficients as the Common Dynamic
Process (CDP), a non-parametric proxy for unobserved
common factors.
\item Cumulate the CDP within each unit (back to the level) and add
it as an extra regressor in a unit-level OLS on levels.
\item Average the unit-level slopes (excluding the CDP) to obtain
the AMG Mean Group estimate.
}

This implementation uses base R throughout and does not add any new
package dependencies.
}
\keyword{internal}
