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  • Mediation(medeff) - missing values generated

    Hello,

    i am new to STATA and quantitative analysis. I have been researching on how to use STATA to do my mediation analysis for a while now. I have a binary dependent variable and two metric mediators. That's why I can't use SEM, unfortunately. With medeff I have found an extension that would be suitable for me. However, I always get the message 'missing values generated' right before the 'Effect' table. Find the Output below (red marked):

    (1,060 missing values generated)
    (1,060 missing values generated)
    (1,060 missing values generated)

    ------------------------------------------------------------------------------------
    Effect | Mean [95% Conf. Interval]
    -------------------------------+----------------------------------------------------
    ACME1 | -.0022841 -.0031201 -.0014768
    ACME0 | -.002289 -.0031259 -.0014815
    Direct Effect 1 | -.0021875 -.003971 -.0005806
    Direct Effect 0 | -.0021923 -.0039754 -.0005832
    Total Effect | -.0044764 -.0062831 -.0028074
    % of Total via ACME1 | .5122697 .3635329 .813602
    % of Total via ACME0 | .5133602 .3643067 .8153339

    Average Mediation | -.0022865 -.003123 -.0014791
    Average Direct Effect | -.0021899 -.0039732 -.0005819
    % of Tot Eff mediated | .512815 .3639198 .8144679
    ------------------------------------------------------------------------------------

    Can someone explain to me what is meant by this and how it happens? I have checked all variables, there are no more missing values and the two regressions that medeff calculates before also have the same N.
    If anyone knows a better way to do my mediation analysis, I'll gladly take that too.
    I have found paramed as an alternative, but there I do not get ACME's (Average Causal Mediation Effect).

    Thanks a lot.

  • #2
    hi, i met the same problem! Did you get any solutions?

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