st: Weights and collapse

["Thuy Le" <tl6775a@american.edu>]

Hi all,
I have a district level dataset, and want to collapse to provincial level. 
Dist_id	prov_id	var1		var2
11		1		15		60
12		1		25		10
..		..		..		..
21		2		35		70
22		2		45		10
..		..		..		..

I tried
. collapse p_var1=var1, by(prov_id)
How can I use var2 as weights?
Thank you,
Thuy Le


*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/