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Hello, I have one question.
I have two-wave panel data in which a same set of variables (say, X and Y) was measured twice.
I'd like to examine whether the X-Y relationship (X=independent variable and Y=dependent variable) differs across the two time points in the panel design (wave 1 vs. wave 2).
To do so, I'd like to create an interaction term between X and TIME (a dummy variable with wave 2=1 and wave 1=0). Then, the regression equation would look like this: Y=a+b1*X+b2*TIME+b3*(X*TIME)+e.
I've heard that this is called "within subject (repeated measure) regression." Is there anyone who can help me run this analysis using SPSS or other stat programs?
Thank you in advance!
BM
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