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Re: st: how to use multiple datasets?

From   "Svend Juul" <[email protected]>
To   <[email protected]>
Subject   Re: st: how to use multiple datasets?
Date   Sat, 30 Jul 2005 17:37:07 +0200

Yang wrote:
I am currently working on project where I need to use multiple datasets (i
do not have access to the original data) on a server.
Each dataset is a country and I am interested in variables X1,X2,X3, Y
How do I run a regression ACROSS the countries with the dependent variable
Y and explanatory variables X1,X2,X3 given that I have multiple datasets
that I cannot merge? do I do a looping function?
But X1,X2 are defined slightly different in each of the country's
datasets, so is there a way to both loop through the countries and
redefine each country's variable when I am at it?
Is it a technical or legal constraint that forbids you to open a dataset with Stata and next save a copy of it on your own computer?
That seems to be neccesary to perform what you want. For each country:
1. Open the dataset from the server.
2. -keep- the variables you need.
3. -save- the reduced dataset to your own computer
4. modify the X1,X2 variables to conform the same rules for all countries
Finally, -append- the modified datasets.
Hope this helps,
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6 
DK-8000 Aarhus C,  Denmark 
Phone, work:  +45 8942 6090 
Phone, home:  +45 8693 7796 
Fax:          +45 8613 1580 
E-mail:       [email protected] 

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