i am trying to do a regression of two indep vars on one dep var. the basic form will be:
Z = aX + bY + c
however, X and Y were measured with two different instruments, whose identity is not in the database. instrument 2 has a fixed ofset from instruemtn 2, such that
X2 = X1+10 and Y2 = Y1+10
i would like to fit the first general equation, and determine whether each individual observation best fits instrument 1 or 2.
i have read switchr but i don't think this fits.
any help is appreciated,
thank you
george hoffman
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