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st: How to copy the contents of a variable into a new variable but in different observations


From   Clarice Martins <martins.clarice@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: How to copy the contents of a variable into a new variable but in different observations
Date   Tue, 22 Oct 2013 20:03:51 -0200

Hello!!

Can anyone help me with this?

I have data that is set as stock returns for different months (variables: jun2000 jul2000 aug2000 and so on), for different companies (variable: ticker_name) and different types of returns (variable: type_return with 3 groups: "formation_period", "buy_sell_period", "holding_period")

I have separated the Jun2000 returns, for the "formation period" observations, into quintile data. ie: now I have a variable called quintile that ranks from 1111 to 5555, my Jun2000 returns for the formation_period only.

Now, I need to copy these quintile numbers between companies (same companies) from "formation period" observations to "buy sell period" observations.   ie.: if AMBV4 has 1 in the "formation period", i need to carry 1 to AMBV4 in the "buy_sell_period" and "hold period" observations.

Is this possible? What is the best way?

I am new at stata and I have been learning a lot of new things, but I am having difficulty with this... Can you guys give a hand??

Thank you very much!!
Clarice


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