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From |
"McCollister, Kathryn E" <KMcColli@med.miami.edu> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
st: Interpreting margins after zip |

Date |
Mon, 20 Jun 2011 15:20:09 -0400 |

We are running SVY:ZIP with MARGINS in STATA 11 to produce the predicted margins. We need some help in interpreting the MARGINS output. Below is the output for the age categories (there are more independent variables besides agec). | Delta-method | Margin Std. Err. z P>|z| [95% Conf. Interval] agec | 1 | 57.43919 4.577922 12.55 0.000 48.46663 66.41175 2 | 115.1437 6.595634 17.46 0.000 102.2165 128.0709 3 | 323.1946 24.02329 13.45 0.000 276.1098 370.2794 Is this the adjusted mean for each age category? If I use STATA 10 and the mfx command with predict(n) with the same zip model, I get the following for age categories 2 and 3. variable | dy/dx Std. Err. z P>|z| [ 95% C.I. ] X ---------+------------------------------------------------------------------ -- _Iagec_2*| 71.59662 10.61 6.75 0.000 50.801 92.3922 .343407 _Iagec_3*| 316.6243 31.971 9.90 0.000 253.963 379.286 .162608 How are these results interpreted? * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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