Exporting/Displaying boottest results

[Mia Hoffmann]

Hi everyone,

I am running a difference in differences regression with Panel data on Stata version 14.2.

I have state-level clustered standard errors, but since there are only 32 states in my data I want to use bootstrapping to correct for bias in the standard errors.
Since I am using survey data I need to include weights [pweight]. These are, however, incompatible with the bootstraps option after reg.

I was recommended the boottest command, but I have trouble getting the results out of Stata into a table.

I run the following code:

reg violence treat i.state i.year [pweight=factor] if year>2003, cluster(ent)

    matrix v = e(V)
    matrix b = e(b)

    boottest treat=0, boottype(wild) seed(22)
    matrix v[1,1] = (_b[treat]/r(t))^2
    
    eststo: ereturn post b v
    sum violence if year>2003
    local N    = r(N)
    local mean = r(mean)

    estadd scalar m  = `mean'
    estadd scalar obs     = `N'
    
#delimit ;
esttab, b(%-9.3f) se(%-9.3f) noobs keep(treat) nonotes nogaps
mlabels(, none) nonumbers style(tex) fragment replace noline label
stats(obs m, fmt(%9.0gc %5.3f)
      label("\\ Observations" "Mean of Dependent Variable"));
#delimit cr

I get the following error message after the line

  eststo: ereturn post b v

:

last estimation results not found, nothing to store
r(301);

.


Any idea how to fix this?


Any help is greatly appreciated.

Mia