Hi all, I am trying to check the Independence of Irrelevant Alternatives Assumption (IIA), using Hauman test in SAS. I found the following code : proc model data=dataset out=fiml2; endogenous y1 y2; y1 = py2 * y2 + px1 * x1 + interc; y2 = py1* y1 + pz1 * z1 + d2; fit y1 y2 / ols 2sls hausman; instruments x1 z1; run; But I have to detect the test between three variables: P1, P2, P3. How does one modify the syntax for a third variable? How would the lines of the syntax be changed?
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