Hi Shannon,
stata stores dates as a number which represents the
number of days from 1/1/1960. You can get the corresponding value for
your date by typing
display date("date", "DMY")
For example, if the date is 5 sept 2007, you would have to type:
display date("9/5/2007", "MDY")
Depending on the way the date is written, you can use "DMY" or "MDY".
Once you get that number, then you can use the 'generate' command to
create the variable you want. So, assuming that your date is 5 sept,
2007, stata would give you the following:
display date("9/5/2007", "MDY")
17414
Then, to create your new variable,
gen var= 1 if date >17414 & date != .
replace var=0 if date <=17414
Hope this helps,
Leny
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