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  • Hausmann-Test Interpretation

    Hey Guys, i just performed a Hausman and a Durbin-Wu-Hausman-Test on my Instrumental variable estimation.
    This is my Code:
    Code:
      **Hausman-Test
    quietly regress lnscore experience nord west east city age age_sq
    estimates store inconsistent
    quietly ivregress 2sls lnscore (experience = vgebuehr) nord west east city age age_sq
    estimates store consistent
    hausman consistent inconsistent
      **Durbin-Wu-Hausman-Test *Ohne robuste Standardfehler
    quietly regress lnscore experience nord west east city age age_sq
    predict e, resid
    regress lnscore experience nord west east city age age_sq e
    test e
    The first one returns a p-value of 0,99 the other one 0,25. How do I interpret these results





  • #2
    Lorenz:
    I would say that there's no evidence of endogeneity.
    Kind regards,
    Carlo
    (Stata 19.0)

    Comment


    • #3
      Originally posted by Carlo Lazzaro View Post
      Lorenz:
      I would say that there's no evidence of endogeneity.
      Thanks. Does that mean that the instrument is exogenous or that there wasnt even a endogenity-problem to begin with?

      Comment


      • #4
        Lorenz:
        probably there wasn't an endogeneity problem at the origin.
        Kind regards,
        Carlo
        (Stata 19.0)

        Comment


        • #5
          Originally posted by Carlo Lazzaro View Post
          Lorenz:
          probably there wasn't an endogeneity problem at the origin.
          Thanks. Just one more question. Whenever i run a weak instrument test, i get an F-vaule of about 7,9. But when i introduce a second instrument it jumps to 55. Does that mean that both together are good instruments or that one is bad but the other is that good, that it increases the F-value by so much?

          Comment


          • #6
            Lorenz:
            if you ran -estat firststage-, please share the full outcome. Thanks.

            Kind regards,
            Carlo
            (Stata 19.0)

            Comment


            • #7
              Originally posted by Carlo Lazzaro View Post
              Lorenz:
              if you ran -estat firststage-, please share the full outcome. Thanks.
              Click image for larger version

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              Comment


              • #8
                Lorenz:

                Code:
                Minimum eigenvalue statistic
                ?
                Kind regards,
                Carlo
                (Stata 19.0)

                Comment

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