dummy variable的問題thanks! - 經濟

各位好~
這是個有關於Dummy variable的model
這是Take home exam其中的一小題>_<
我想破頭了還是不確定答案是甚麼(黃色那段)
希望有好心的經濟/統計高手給我一些指點
今天下午2:00是繳交報告的期限(大概12:30就會出門了)

She wishes to test whether three other variables also affect earnings.
These variables are marital status, union membership and whether
or not the person lives in the northeast
region. She has obtained sample data that contains results for the
following variables.

wage earnings per hour
educ years of education
age years
exper years of work experience
female =1 if female
married =1 if married
union =1 if union member
northeast =1 if northeast
midwest =1 if midwest
south =1 if south
west =1 if west
fulltime =1 if full time worker
metro =1 if lives in metropolitan area


Formulate a model that will allow the economist to test
whether the three variables mentioned above have significant
effects on earnings.

The economist wants to be able to test whether base salary
is affected or whether the rates that earnings increase with
education and experience are also affected.

She also wishes to determine whether effect of union membership
on earnings is different for the northeast region compared to
the rest of the country (intercept term only).

我的答案是:
ln(wage)=b1+b2educ+b3exper+r1married+r2union+r3northeast+v1(union*northeast)

但我不知道黃色那段的要求是甚麼:只是把educ和exper放入model裡面嗎?
另外綠色那段我不是非常確定加入v1(union*northeast)就好
P.S r1和v1都只是代表係數

感謝任何給我意見的人!


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