{smcl}
{* 25sep2006}{...}
{hline}
help for {hi:sbri} 
{hline}

{title:Spearman-Brown reliability}

{p 8 24 2}
{cmd:sbri} [{cmd:,} {cmdab:obs(}{it:#}{cmd:)} {cmdab:f:ormat(%}{it:fmt}{cmd:)}  ]   

{title:Description}

{p 4 4 2}
{cmd:sbri} calculates the Spearman-Brown reliability. It must be used after {cmd:xtreg} with the
{cmd: mle} (maximum-likelihood random-effects estimator) option. It is an immediate command.

{title:Options}

{p 4 8 2} {cmdab:obs(}{it:#}{cmd:)} specifies the number of repeated measurements. The default is e(g_avg).

{p 4 8 2}{cmdab:f:ormat(%}{it:fmt}{cmd:)} specifies the display format for presenting numbers. The default is %3.2f. {p_end}

{title:Examples}

{p 4 8 2}{stata "use http://www.stata-press.com/data/r9/auto7"}{p_end}
{p 4 8 2}{stata "loneway mpg manufacturer_grp if nummake == 4"}{p_end}
{p 4 8 2}{stata " xtreg mpg  if nummake == 4 , i(manufacturer_grp) mle"}{p_end}
{p 4 8 2}{stata "sbri"}{p_end}

{title:Authors}

{p 4 4 2}Nicola Orsini, Division of Nutritional Epidemiology, IMM, Karolinska Institutet, Sweden

{title:Also see}
 
{p 4 13 2} Manual:  {hi:[U] 23 Estimation and post-estimation commands},{break}
{hi:[U] 29 Overview of Stata estimation commands},{break}
{hi:[XT] xtreg}
  
{p 4 13 2}
Online:  help for {help loneway} , {help xtreg}