I'm do a controlled interrupted time series analysis on Stata 15.1.
I have five years of panel data (2014-2018), and my subjects are health clinics. I have c.500 clinics in my treatment group, and c.7000 clinics in my control group. The intervention happened in 2017.
I've tried using the 'ista' command; but that only allows one treatment group (i.e. one clinic), like so:
Code:
itsa Dependent_var, treat(1) trperiod(2017) lag(1) posttr figure
Many thanks.
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