How to incorporate number of credits as weights?

[Neg Kha]

Hi,

I want to regress variable "pass" which is equal to 1 if the course was passed on variable "roommate" which is a dummy equal to 1 if the individual has a roommate.
I would like to weigh each pass observation by the number of credits each course has. How should I do this? Would it suffice to use [aw=credits] in the regression? Would it be the same case if I have an instrument and I want to use ivregress 2sls?

My data looks like the sample below:

* Example generated by -dataex-. To install: ssc install dataex
clear
input float id str1 course_code float(pass credits roommate)
1 "A" 1   5 1
1 "B" 1   5 1
1 "C" 1   4 1
1 "D" 0   2 1
1 "E" 1   2 1
1 "F" 1   2 1
2 "A" 1   5 0
2 "B" 0   5 0
2 "G" 0   5 0
2 "H" 1   5 0
3 "N" 1 7.5 1
3 "M" 1 7.5 1
3 "O" 1 7.5 1
3 "B" 1   5 1
4 "Y" 0  15 1
4 "Z" 0 2.5 1
5 "Q" 1   5 1
6 "R" 1 7.5 0
6 "T" 1 7.5 0
7 "B" 1   5 0
7 "C" 1 2.5 0
7 "D" 1   3 0
end

Thanks!

[Neg Kha]

Can anyone help with this please?

[George Ford]

aw=credits would do it.

[Neg Kha]

aw=credits would do it.

Thanks! Would it give me the same results if I manually take the weighted average of the variable pass for each individual?

Best

[George Ford]

reg pass roommate 
tabstat pass, by(roommate) save
di r(Stat2)[1,1] - r(Stat1)[1,1]


reg pass roommate [aw=credits]
tabstat pass [aw=credits], by(roommate) save
di r(Stat2)[1,1] - r(Stat1)[1,1]