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st: modeling constraint question
Does anyone know a way to constrain the predict
function? I'm working with a simple funding model
that the organization is comfortable with:
funding06 = bx1 + bx2+ bx3+e
I'd like to constrain the funding07 values for each
grantee so that they are +/- a given percent (e.g. if
the budget goes down 10% each grantee gets 10% less.
The reason for doing it this way, I'm told, is that
the variables (e.g. x1) change differently from year
to year for each grantee and that the 'need' they
represent is also supposed to alter their funding
(need based) all else equal.
I'm pretty new to this, so club me gently if this
makes no sense.
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