<>
Three responses advised you to create a new variable and then use -regress-.
Note, though, that a better option would be to use -nl-
nl (y = {a} + {b1}*x + {b2}*x^2), variables(x)
as in http://www.stata-journal.com/article.html?article=st0141
which would allow Stata to know that x and x squared "move in tandem" and
calculate the correct marginal effects...
HTH
Martin
_______________________
----- Original Message -----
From: "Shell makka" <[email protected]>
To: <[email protected]>
Sent: Tuesday, February 17, 2009 4:18 AM
Subject: st: Quadratic regression
Dear statalist
It would be greatly appreciated if you can answer my question.
I would like to fit a quadratic regression Model (Y=a+bX+cX^2) on my
data and do predictions , would you please let me know what will be
the code for that in stata?
Many thanks,
Shell
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