You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
1.5 KiB
Plaintext
67 lines
1.5 KiB
Plaintext
7 months ago
|
program define predraschwlm,rclass
|
||
|
|
syntax varlist , genlt(string) id(string)
|
||
|
|
|
||
|
|
tempfile filesave
|
||
|
|
qui save `filesave',replace
|
||
|
|
tempname diff theta
|
||
|
|
matrix `diff'=r(beta)
|
||
|
|
matrix `theta'=r(theta)
|
||
|
|
|
||
|
|
|
||
|
|
qui count
|
||
|
|
local N=r(N)
|
||
|
|
|
||
|
|
tokenize `varlist'
|
||
|
|
local nbitems:word count `varlist'
|
||
|
|
|
||
|
|
tempname item offset id
|
||
|
|
qui gen `id'=_n
|
||
|
|
|
||
|
|
forvalues i=0/`nbitems' {
|
||
|
|
local thetascore`i'=`theta'[1,`=`i'+1']
|
||
|
|
}
|
||
|
|
|
||
|
|
tempname nbmiss
|
||
|
|
qui egen `nbmiss'=rowmiss(`varlist')
|
||
|
|
tempfile s
|
||
|
|
qui save `s',replace
|
||
|
|
forvalues i=1/`N' {
|
||
|
|
use `s',clear
|
||
|
|
if `nbmiss'[`i']!=0 {
|
||
|
|
local w`i'=0
|
||
|
|
local l`i'=1
|
||
|
|
forvalues j=1/`nbitems' {
|
||
|
|
local item`j'=``j''[`N']
|
||
|
|
local diff`j'=`diff'[1,`j']
|
||
|
|
local rep`i'_`j'=``j''[`i']
|
||
|
|
if `rep`i'_`j''!=. {
|
||
|
|
local w`i' `w`i''+exp(x-`diff`j'')/(1+exp(x-`diff`j''))^2
|
||
|
|
local l`i' `l`i''*exp(`rep`i'_`j''*(x-`diff`j''))/(1+exp(x-`diff`j''))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
local w`i' sqrt(`w`i'')
|
||
|
|
*di "`i'"
|
||
|
|
clear
|
||
|
|
qui set obs 20001
|
||
|
|
qui gen u=_n
|
||
|
|
qui gen x=(u-10001)/1000
|
||
|
|
qui gen f=`w`i''*`l`i''
|
||
|
|
qui gsort -f
|
||
|
|
local tl`i'=x[1]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
qui use `filesave',clear
|
||
|
|
qui capture drop `genlt'
|
||
|
|
qui gen `genlt'=.
|
||
|
|
tempname scores
|
||
|
|
qui genscore `varlist',score(`scores')
|
||
|
|
forvalues i=0/`nbitems' {
|
||
|
|
qui replace `genlt'=`thetascore`i'' if `scores'==`i'
|
||
|
|
}
|
||
|
|
forvalues i=1/`N' {
|
||
|
|
if `genlt'[`i']==. {
|
||
|
|
qui replace `genlt'=`tl`i'' in `i' if `genlt'==.
|
||
|
|
}
|
||
|
|
}
|
||
|
|
end
|