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  • results of casual mediation analysis

    Dear all,

    i am using "medeff" command to test whether there is causal mediation effect.
    my command is : medeff (regress m t x)(regress y t m x), mediate (m) treat(t) sims(1000)
    the results i got are like:
    Effect Mean [95% Conf. Interval]

    ACME -.0299609 -.0737738 .0108401
    Direct Effect .7081524 .3663922 1.064999
    Total Effect .6781915 .3316459 1.039999
    % of Tot Eff mediated -.0442613 -.0903402 -.0288087
    i am wondering why i cannot get ACME1, ACME0, Direct Effect 1 and Direct Effect 0 respectively, as shown in guided book using the same command:
    Effect Mean [95% Conf. Interval]
    ACME1 .0624004 .0410497 .0888912
    ACME0 .0624004 .0410497 .0888912
    Direct Effect 1 .2638839 .17911 .351345
    Direct Effect 0 .2638839 .17911 .351345
    Total Effect .3262843 .2238124 .4363766

    how to solve this problem? thanks a lot!
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