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st: re: What to do about multiple observations for one individual in one same period in a panel


From   Kit Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: What to do about multiple observations for one individual in one same period in a panel
Date   Sun, 19 Jul 2009 12:42:46 -0400

<>
Nick said

I think you need to think about what you want here from an economics point of view. You could aggregate or average multiple bonds in some way. You could create some pseudo-time variable such that Stata will still treat these data as panel data.
...

I would think that you might want to keep track of, for each country- year, (1) the number of debt issues (that is the number of duplicated country-year records in your example), as an indicator of the country's success in attracting investor / underwriter interest
(2) the total amount of debt issued per country-year
(3) the weighted average yield on the debt per country-year
(4) the weighted average tenor (term to maturity) on the debt per country-year The last two will take a bit of calculation, but these quantities may easily be produced by -collapse- from your original data. If you have bond prices rather than yields, then you could take the weighted average price (although it would be cleaner to convert them to yields first).
Kit
Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html



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