st: Standard errors in Regression Discontinuity design

["Silviya Nikolova" <nikolova@email.unc.edu>]

Dear Statalist,

I am running a weighted regression around some cutoff level . The regression 
is Regression Discontinuity design. I am adopting the following exponential 
weighting scheme:

weight = (exp(((-(faminc-cutoff)^2)/2)*alpha))

where
faminc=family income
cutoff=cutoff level between two consecutive income groups
alpha=decay parameter

My question is: how to compute the standard errors in this case?

Many thanks in advance!

Silviya 

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/