getFE {FENmlm}

Extract the Fixed-Effects from a femlm estimation.

Description

This function retrives the fixed effects from a femlm estimation. It is useful only when there are more than one cluster.

Usage

getFE(x)

Arguments

x

A femlm object.

If the cluster coefficients not regular, then several reference points need to be set, leading to the coefficients to be NOT interpretable. If this is the case, then a warning is raised.

Value

A list containig the vectors of the fixed effects.

If there is more than 1 cluster, then the attribute “References” is created. This is a vector of length the number of clusters, each element contains the number of fixed-effects set as references. By construction, the elements of the first clusters are never set as references. In the presence of regular clusters, there should be Q-1 references (with Q the number of clusters).

Author(s)

Laurent Berge

See Also

plot.femlm.allClusters. See also the main estimation function femlm. Use summary.femlm to see the results with the appropriate standard-errors, getFE to extract the cluster coefficients, and the functions res2table and res2tex to visualize the results of multiple estimations.

Examples

data(trade)

# We estimate the effect of distance on trade => we account for 3 cluster effects
est_pois = femlm(Euros ~ log(dist_km)|Origin+Destination+Product, trade)

# obtaining the cluster coefficients
fe_trade = getFE(est_pois)

# plotting them
plot(fe_trade)

# plotting only the Products fixed-effects & showing more of them
plot(fe_trade$Product, n=8)