d truncreg. Truncated regression (updates to STB-52 sg122) 
d Program by Ronna Cong, stata Corporation <rcong@@stata.com>
d STB 52 distribution, November 1999.
d 
d ^truncreg^ is used to estimate a regression model for data from
d a truncated normal distribution. See STB-52 sg122 for complete
d documentation. This updates fixes a minor bug that would couse
d the programs to fail due to the collinearity of the independent 
d variables. 
d

f truncreg/truncreg.ado  
f truncreg/trunc_ll.ado
f truncreg/truncr_p.ado
f truncreg/truncreg.hlp