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  • Staggered DID- Callaway &Sant'Anne

    Hello All,
    Please help me in understanding the results for my study. I'm trying to do Staggered DID for my study. When I'm running the data with not yet treated group as control group, the following results are showing with missing pre and post average. could someone explain the reason for this?

    ------------------------------------------------------------------------------
    ATT by Periods Before and After treatment
    Event Study:Dynamic effects
    ------------------------------------------------------------------------------
    | Coefficient Std. err. z P>|z| [95% conf. interval]
    -------------+----------------------------------------------------------------
    Pre_avg | .2248858 . . . . .
    Post_avg | .3703633 . . . . .
    Tm7 | 1.089354 .5774873 1.89 0.059 -.0425 2.221209
    Tm6 | .2666746 .248427 1.07 0.283 -.2202334 .7535825
    Tm5 | .1688256 .170269 0.99 0.321 -.1648955 .5025467
    Tm4 | -.0343087 .0912981 -0.38 0.707 -.2132498 .1446323
    Tm3 | .1500378 .1257966 1.19 0.233 -.096519 .3965945
    Tm2 | .0297712 .0846234 0.35 0.725 -.1360875 .19563
    Tm1 | -.0961543 .0945599 -1.02 0.309 -.2814883 .0891798
    Tp0 | .5550707 .1068131 5.20 0.000 .3457208 .7644206
    Tp1 | .3402238 .161375 2.11 0.035 .0239347 .6565129
    Tp2 | .3912039 .2344475 1.67 0.095 -.0683048 .8507125
    Tp3 | .5537688 .2950958 1.88 0.061 -.0246083 1.132146
    Tp4 | .1569153 .352826 0.44 0.657 -.534611 .8484416
    Tp5 | .5953608 .4422732 1.35 0.178 -.2714787 1.4622
    Tp6 | 0 (omitted)

  • #2
    The reason is that TP6 is being omitted.
    Please try
    estat event, window(-7 5)

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