check_convergence: Check Convergence of All Estimation Stages

In metafrontier: Analysis of Metafrontier Models for Efficiency and Productivity

Check Convergence of All Estimation Stages

Description

Reports the convergence status of every estimation stage of a fitted metafrontier model: each group-level frontier and the metafrontier itself. This makes it easy to verify that all optimisers (MLE) and mathematical programmes (LP/QP) finished successfully before interpreting technology gap ratios, confidence intervals, or efficiency decompositions.

Usage

check_convergence(object, ...)

## S3 method for class 'metafrontier'
check_convergence(object, ...)

## S3 method for class 'lc_metafrontier'
check_convergence(object, ...)

## S3 method for class 'malmquist_meta'
check_convergence(object, ...)

Arguments

object	a fitted model object.
...	additional arguments passed to methods.

Details

For groups supplied via the models argument of metafrontier the convergence status of the external fitter is not tracked, and the corresponding rows carry NA with an explanatory note.

Value

A data frame of class "metafrontier_convergence" with one row per estimation stage and columns:

stage

stage label, e.g. "group: G1" or "metafrontier"

method

how the stage was estimated: "MLE", "LP", "QP", "QP (barrier)", "DEA", or "external"

code

the integer convergence code returned by the optimiser (0 indicates success); NA for DEA stages and externally fitted groups

converged

logical convergence indicator; for DEA stages TRUE unless any efficiency score is NA (infeasible programme); NA for externally fitted groups

note

additional detail, e.g. the number of infeasible DEA programmes

Examples

sim <- simulate_metafrontier(n_groups = 2, n_per_group = 50, seed = 42)
fit <- metafrontier(log_y ~ log_x1 + log_x2, data = sim$data,
                    group = "group")
check_convergence(fit)

metafrontier documentation built on Aug. 19, 2026, 5:08 p.m.