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st: Converting monthly values to quarterly averages

From   "Chari, Anusha" <>
To   "" <>
Subject   st: Converting monthly values to quarterly averages
Date   Wed, 20 Feb 2013 17:12:18 +0000

Dear Stata Users,

I have data at a monthly frequency by industry across years and would like to create quarterly averages by industry and year. I tried the tscollap command after specifying that the data was a panel and get an error that time-series operators not allowed. Please advise.

My data are in the following format:

Industry month year wpivalue

 I would like to convert them to:

Industry quarter year wpiqtraverage

Thanks in advance.

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