Dear all,
I am researching the effect of grade retention on exam results (which can vary from 0 to 20) and I am using a RDD to research the LATE. However, when I use the rdrobust command, it states that it is not possible to compute the local polynomial bandwidth and that I should run rdbwselect () for more information.
After running the rdbwselect-command, Stata says: Invertibility problem in the computation of preliminary bandwidth below the threshold. Invertibility problem in the computation of preliminary bandwidth above the threshold. Invertibility problem in the computation of bias bandwidth (b) below the thresholdInvertibility problem in the computation of bias bandwidth (b) above the threshold. Invertibility problem in the computation of loc. poly. bandwidth (h) below the thresholdInvertibility problem in the computation of loc. poly. bandwidth (h) above the threshold
I think the problem is that my running variable as well as my outcome variable are discrete variables (it's either 0, 1, 2, ..., 18, 19, 20). Is there any way I can solve this?
Kind regards,
Charles Calmeyn
Related Posts with RDD rdrobust problem
Eliminating leading blanks from a stringHi all, It seems there are leading blanks for a string variable state in 2 out of 5 rounds of data …
Interpreting Interaction Term CoefficientsDear Stata Users, I intend to study the relationship between ethnicity and COVID-19 on income. I c…
Spilt variable and fill in numeric terms in the stringDear Statalist, I have a variable called Name which looks like below. I would like to spilt Name in…
Creating lagged variables with pooled cross sectional dataI am working with a dataset that contains student grade observations in a variety of subjects, in di…
HELP! xtline producing different graphs each runPlease help! I have a simple, balanced longitudinal data set. I xtset the data and then run xtline.…
Subscribe to:
Post Comments (Atom)
0 Response to RDD rdrobust problem
Post a Comment