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re: Antwort: RE: st: why reg3 dropped constant term ?

From   Christopher Baum <[email protected]>
To   <[email protected]>
Subject   re: Antwort: RE: st: why reg3 dropped constant term ?
Date   Sun, 2 Jan 2011 15:43:19 -0500

Justina said

estimating for a subsample for which the succedding year is availabe,
e.g. for 2001- 2005, with data for 2006 available, so that the first
difference 2005-2006 can be caculated.

This is not how first differences (D. in Stata) work. The first difference in 2005 is defined if you have data for 2004 and 2005. You are never concerned about the succeeding year's data. However, with data for 2001-2005, you can only calculate D. for 2002-2005.


Kit Baum   |   Boston College Economics & DIW Berlin   |
                              An Introduction to Stata Programming  |
   An Introduction to Modern Econometrics Using Stata  |

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