Gender Income Difference Test

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badman127
Posts: 4
Joined: Thu Jan 23, 2014 8:23 pm

Gender Income Difference Test

Postby badman127 » Thu Jan 23, 2014 8:30 pm

Hi everybody,
I have the data of about 5000 observations about the income factors of male and female. I want to generate OLS regression for each gender's income (meaning that I will get 2 separate equations for male and female income respectively)
But I have trouble in comparing the gap between the income of male and female.
Any suggestion about the Test or model that I can use to find the income difference in gender?
Thanks a lot.

startz
Non-normality and collinearity are NOT problems!
Posts: 3775
Joined: Wed Sep 17, 2008 2:25 pm

Re: Gender Income Difference Test

Postby startz » Thu Jan 23, 2014 8:43 pm

badman127 wrote:Hi everybody,
I have the data of about 5000 observations about the income factors of male and female. I want to generate OLS regression for each gender's income (meaning that I will get 2 separate equations for male and female income respectively)
But I have trouble in comparing the gap between the income of male and female.
Any suggestion about the Test or model that I can use to find the income difference in gender?
Thanks a lot.


Suppose that income is Y, there is an explanatory variable X, and D is a dummy variable coded 1 for women. You can run the equation

Code: Select all

ls Y C X D D*X

The coefficient on D tells you the difference in the intercept and the coefficient on D*X tells you the difference in the effect of X on Y.

badman127
Posts: 4
Joined: Thu Jan 23, 2014 8:23 pm

Re: Gender Income Difference Test

Postby badman127 » Thu Jan 23, 2014 10:09 pm

startz wrote:
badman127 wrote:Hi everybody,
I have the data of about 5000 observations about the income factors of male and female. I want to generate OLS regression for each gender's income (meaning that I will get 2 separate equations for male and female income respectively)
But I have trouble in comparing the gap between the income of male and female.
Any suggestion about the Test or model that I can use to find the income difference in gender?
Thanks a lot.


Suppose that income is Y, there is an explanatory variable X, and D is a dummy variable coded 1 for women. You can run the equation

Code: Select all

ls Y C X D D*X

The coefficient on D tells you the difference in the intercept and the coefficient on D*X tells you the difference in the effect of X on Y.


Dear Startz,
Thanks for your help but the main problem here is about my data.
Here is the description of the factors:
earns Wife’s weekly earnings
educ Wife’s years of schooling
age Wife’s age
exper Age – educ – 6
union =1 if wife is in union
kidge6 =1 if child>=6 in family
kidlt6 =1 if child<6
hours Wife’s weekly hours
inlf =1 if wife is in labour force
nwifeinc Non-wife income, $1000s
faminc Annual family income
husage Husband’s age
husearns Husband’s weekly earnings
husunion =1 if husband is in union
huseduc Husband’s years of schooling
husexp Husage – Huseduc – 6
hushrs Husband’s weekly hours
With this data I need to estimate Earnings Function separately for male and female, and assess the gender differences. Therefore I think it's hard to generate the model as you mentioned above :(
Please help!
Attachments
Data.xls
(730 KiB) Downloaded 492 times

startz
Non-normality and collinearity are NOT problems!
Posts: 3775
Joined: Wed Sep 17, 2008 2:25 pm

Re: Gender Income Difference Test

Postby startz » Thu Jan 23, 2014 10:12 pm

The equation I gave you does estimate the equations separately. But you can also go

Code: Select all

smpl if D
ls y c x
smpl if not D
ls y c x

badman127
Posts: 4
Joined: Thu Jan 23, 2014 8:23 pm

Re: Gender Income Difference Test

Postby badman127 » Thu Jan 23, 2014 10:26 pm

Please take a look at the data, each row represents a household with a husband and a wife, and I don't know how to deal with it to generate the dummy variables you're saying :(
The model you said is really good, but how to achieve it is too hard for me :(

Thanks for your help in advance!

startz
Non-normality and collinearity are NOT problems!
Posts: 3775
Joined: Wed Sep 17, 2008 2:25 pm

Re: Gender Income Difference Test

Postby startz » Thu Jan 23, 2014 11:01 pm

Run one regression with earns as the dependent variable and one with husearns as the dependent variable?

badman127
Posts: 4
Joined: Thu Jan 23, 2014 8:23 pm

Re: Gender Income Difference Test

Postby badman127 » Thu Jan 23, 2014 11:18 pm

That's exactly what I have done, I got the estimation for those 2.
And the thing I tried to ask is how to assess the gender difference in income? :P
Sorry if I couldn't clarify it from the beginning.

startz
Non-normality and collinearity are NOT problems!
Posts: 3775
Joined: Wed Sep 17, 2008 2:25 pm

Re: Gender Income Difference Test

Postby startz » Fri Jan 24, 2014 7:16 am

What do you mean by "assess the difference?" If your assignment is what I think it is, you might google "Blinder-Oaxaca Decomposition"


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