Thanks!
Carolina
On Mar 4, 2013, at 3:35 PM, Ariel Linden. DrPH wrote:
> Hi Carolina,
>
> The "transfer function" is really old school. Stata allows you to enter
> covariates in ARIMA, which it refers to as "ARMAX" which allows you the
> flexibility to model treatment effects in time series models.
>
> Therefore you can generate a covariate for the "step" (the value of the
> outcome in the month right after the start of the intervention), as well as
> the "post intervention trend" (and interaction term between the "time"
> variable and "treatment" variable).
>
> Ariel
>
> Date: Sun, 3 Mar 2013 16:39:54 -0300
> From: Caro ALIYA <aliyabay@gmail.com>
> Subject: st: Interrupted Time Series Analysis
>
> Dear all,
>
> Im running an ARIMA model with an intervention that is gradual and
> permanent.
> Is there a way in Stata to specified the transfer functions (parameter
> w & delta).
>
> Thanks,
>
> Carolina
> *
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/faqs/resources/statalist-faq/
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/
