{smcl}
{hline}
help for {hi:peers}
{hline}

{title:An Extension to egen for the Computation of Peers' Average Characteristics}

{p 8 27}
{cmdab:egen}
[{it:type}]
{it:newvar} = peers({it:argument})
[{it:if}] [{it:in}],
{cmdab:by}{cmd:(}{it:varname}{cmd:)}

{p}

{title:Description}

{p 0 0}
{hi:peers} is an extension to {hi:egen} that computes the average characteristic
of peers in a unit defined by {it:argument}.

{title:Behaviour with missing values and small units}

{p 0 0}
{hi:peers} ignores missing values, ie they do not count in the mean. Moreover
if a unit has only one observation, then {it:newvar} is set to missing.

{title:Examples}

egen average_age_of_peers = peers(age), by(classroom) 

{title:Author}

{p}
Amine Ouazad, PhD Candidate of the Paris School of Economics,
Webpage {browse "http://www.pse.ens.fr/junior/ouazad/"}
Email {browse "mailto:amine.ouazad@pse.ens.fr":amine.ouazad@pse.ens.fr}

{title:Also see}

{help egen}