Hi,

I'm performing a Negative binomial regression (xtnbreg), however, I found that the confidence interval of my regression includes zero.
Does this mean that I can neither accept nor reject my hypothesis?
If for example, my hypothesis is: CEO stock options are positively related to acquisition activity.
Code:
--------------------------------------------------------------------------------------
        Acquisitions |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
---------------------+----------------------------------------------------------------
L_Grant_stockoptions |    .001497   .0100047     0.15   0.001    -.0181117    .0211058
         L_firm_size |   .2236534   .1122078     1.99   0.046     .0037301    .4435768
   L_stock_ownership |   .0479732   .0392127     1.22   0.001    -.0288823    .1248287
        L_other_comp |   .0733703   .0482289     1.52   0.128    -.0211566    .1678973
             CEO_age |  -.0069845   .0180781    -0.39   0.099     -.042417     .028448
          CEO_gender |   15.25186   523.3139     0.03   0.077    -1010.425    1040.928
          CEO_tenure |  -.0092427   .0184607    -0.50   0.017    -.0454251    .0269397
               _cons |  -6.097821   5.460795    -1.12   0.264    -16.80078    4.605142



Thank you!