[Gretl-users] dummy variables
cottrell at wfu.edu
Mon Nov 16 08:57:55 EST 2009
On Mon, 16 Nov 2009, Data Analytics Corp. wrote:
> I have two question on how to create dummy variables. Suppose...
> 1. I have a time series of annual data, say from 1970 to 2000. How
> do I create a dummy for the period 1975-1980 (1 for this period, 0
Ignacio answered that one.
> 2. I have cross-sectional data by states. How do I create a dummy
> for the southern region where I know the states in that region?
Basically the same answer, except that the Southern states might
not be contiguous in your dataset, in which case you'd need
series south = (obs==1 || obs==2 || obs==5 ...)
Or, if the dataset contains state labels for the observations,
series south = (obs=="AL" || obs=="SC" || ...)
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