st: bootstrap a parameter vector

[Edwin Leuven <e.leuven@uva.nl>]

dear all,

i am trying to bootstrap a parameter vector.

i have written an eclass program along the lines of this:

cap program drop eff
program eff, eclass
dprobit geb bdate girl p2 p5 if achter==1
tempvar t
g `t' = e(sample)
matrix b = e(dfdx)
eret post b, esample(`t')
end

if i read the documentation well i can now bootstrap my estimates as 
follows:

. bootstrap , reps(100): eff

or

. bootstrap _b , reps(100): eff


but both throw an error:

. bootstrap , reps(100): eff
(running eff on estimation sample)
last estimation results not found, nothing to store
estimation result __000002 not found
r(111); t=0.17 15:27:41


does anyone know what i am doing wrong here?

thanks, edwin.


--
http://leuven.ecodip.net
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