regress model questions.... please help~ thanks

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Equation1:E[wage|race,married, racemarried]=8.93-1.2race1married-2.19race2-1.96race2married-0.5race3-0.33race3married
if I want to calculate the wage of the race3married, it should be 8.93-0.5-0.33?
the basegroup is race1unmarried?
the wage that race3married is 0.33 less than the wage that race1unmarried made?



Equation2:E[wage|race,married, racemarried]=8.93-2.19race2-0.5race3-1.2married+1.44race2married+1.38race3married
the two regression models have the same data, but the coefficients of the race2married and race3married are so different, may I ask why?

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关键词：questions question regress please thanks regression分析 multiple regression Regressions 回归 regression Regression Analysis

交互效应要含主变量，Equation2 better。