Expected Probability

[Hm Saleh]

Hello guys,

Could you please help me with my confusion?

For the logit results,

I want to calculate the expected probability of having at least one child for a white, nonHispanic woman in each age group, holding all other variables constant, and then for each level of education, holding all other variables constant.


I used this code:


logit LIVE_BIRTHS ESTINCOME SHAREARNINGS i.EDUCATION i.AGE i.MARITAL_STATUST i.RACE i.HISPANIC


local b0 = _b[_cons]

local b1 = _b[2.AGE]

local b2 = _b[3.AGE]

local b3 = _b[4.AGE]

local b4 = _b[5.AGE]

local b5 = _b[1.HISPANIC]

generate xAGE_HISPANIC = `b0' + `b1'*1 i am not sure why b1 times 1 + _b[2.AGE]*2.AGE + _b[3.AGE]*3.AGE + _b[4.AGE]*4.AGE + _b[5.AGE ]*5.AGE + _b[1.HISPANIC]*1.HISPANIC

generate prAGE = exp(xAGE_HISPANIC)/(1 + exp(xAGE_HISPANIC))


local b0 = _b[_cons]

local b1 = _b[2.EDUCATION]

local b2 = _b[3.EDUCATION]

local b3 = _b[4.EDUCATION]

local b4 = _b[5.EDUCATION]

local b5 = _b[1.HISPANIC]


generate xEDUCATION_HISPANIC = `b0' + `b1'*1 + _b[2.EDUCATION]*2.EDUCATION + _b[3.EDUCATION]*3.EDUCATION + _b[4.EDUCATION]*4.EDUCATION + _b[5.EDUCATION ]*5.EDUCATION + _b[1.HISPANIC]*1.HISPANIC
generate prEDUCATION_INCOME = exp(xEDUCATION_HISPANIC)/(1 + exp(xEDUCATION_HISPANIC))

[Weiwen Ng]

Why just not use predict, e.g.

predict xAGE_HISPANIC

[Hm Saleh]

this is my result

[Hm Saleh]

Weiwen Ng

you asked me

Why just not use predict.

because I have many predict values I should find.

[Weiwen Ng]

Weiwen Ng

you asked me

Why just not use predict.

because I have many predict values I should find.

Please read the FAQ; we're asked not to post screenshots of results. The results are more readable in code delimiters, like I used for my suggested code.

I see what you mean. I read too fast. You could actually get this using margins. Here's one explainer by Richard Williams. It should be something like

margins age, at(race = 1 hispanic = 0) atmeans

for your first example.

[Hm Saleh]

I tried to type help dataex but it doesn't work
I got this massage