CQUAD with weights

[Melissa Siqueira]

Does anyone know if it possible to run cquad with weights?

[Andrew Musau]

I do not use cquad which is from SSC (FAQ Advice #12). Look at the syntax and see if it allows weights. For regress, you see this from the documentation

h regress

regress depvar [indepvars] [if] [in] [weight] [, options]

In case it does not, then with frequency weights, you can expand the data as below:

webuse hanley
roctab disease rating [fw=pop]
preserve
expand pop
roctab disease rating
restore

Res.:

. webuse hanley

.
. roctab disease rating [fw=pop]

                      ROC                    -Asymptotic Normal--
           Obs       Area     Std. Err.      [95% Conf. Interval]
     ------------------------------------------------------------
         2,513     0.9886       0.0018        0.98516     0.99209

.
. preserve

.
. expand pop
(2,404 observations created)

.
. roctab disease rating

                      ROC                    -Asymptotic Normal--
           Obs       Area     Std. Err.      [95% Conf. Interval]
     ------------------------------------------------------------
         2,513     0.9886       0.0018        0.98516     0.99209

. 
. restore

For other kinds of weights, a workaround may not be straightforward.