Hello,
I am doing a fractional regression. I would like to do a robustness check with bootstrapped SE. So, I typed in the following command
But I get a warning message:
So, I read the -tsset- help file, and tried setting year as the time indicator as below
But it said:
For each year, I have several companies, so the "year" definitely are repeated indeed.
Does anyone know how to solve this problem, so that I can do a robust analysis?
I am doing a fractional regression. I would like to do a robustness check with bootstrapped SE. So, I typed in the following command
Code:
fracreg logit fl.IV DV control1 control2 control3 i.year, vce(bootstrap, reps(5000))
Code:
time-series operators are not allowed with bootstrap without panels, see tsset
Code:
tsset year
Code:
repeated time values in sample
Code:
year | Freq. Percent Cum. ------------+----------------------------------- 2008 | 31 9.81 9.81 2009 | 37 11.71 21.52 2010 | 40 12.66 34.18 2011 | 45 14.24 48.42 2012 | 37 11.71 60.13 2013 | 39 13.92 74.05 2014 | 41 12.97 87.03 2015 | 30 12.97 100.00 ------------+----------------------------------- Total | 305 100.00
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