d intreg2. Performs interval regression with heteroskedasticity option.
d Program by Weihua Guan, StataCorp <wguan@@stata.com>.
d
d This program is an expansion of -intreg-. It adds one more option to 
d specify the conditional variance. The model then will contain
d multiplicative heteroskedasticity. 

f intreg2/intreg2.ado
f intreg2/intreg2.hlp
f intreg2/intrg_v_ll.ado
f intreg2/intreg2_p.ado