I could not find a way to adjust width out the bar and "outergap" (the gap between the edge and the first and the last bar in hbar graph. Example is below. I believe I have specified "outergap" as per manual, but it does not change anything. Also, I do not know how to change the width of the bars.

Thank you!

use http://www.stata-press.com/data/r13/educ99gdp, clear

graph hbar (asis) public private, over(country, sort(total) descending) stack ///
outergap(.5) ///
title( "Spending on tertiary education as % of GDP, 1999", span pos(11) ) subtitle(" ")