/*i=> number of intervals between 0 and 1 PD */
gen i=10
gen b=1/i
gen rating = .

/*assign ratings, y lower limit, x higher limit */
forvalues a=1/`=i' {
local x (`a'/`=i')
local y `x'-`=b'
replace rating=`a' if uhat<`x' & uhat>`y'
}
/*rating -> 1=AAA 7=Caa */