9. Using regression adjustments to estimate the effects of policy intervention Suppose you want to examine the effects of a job training program, and estimate the following regression model to do so: carn 98 4.6+2.5train +0.34earn 96+0.35educ-0.2age +2.3 married where earn 98- labor market earnings in 1998, in thousands of dollars train-1 if the employee participated in the training program, and -0 otherwise earn 96- labor market earnings in 1996 (the year before the training program), in thousands f dollars educ= years of schooling age age, in years married 1 if the employee is married, and =0 otherwise 74 1.120 R2=0.42 Using unrestricted regression adjustment, which of the following best represents the estimated equation with full interactions? Ⓒearn 98-5.3+3.2train +0.33earn 96+0.37educ-0.2age +3married +0.13 train (earn 96-earn 96) +0.036 train-(educ-educ) +0.053 train- (age-age)+1.15 train- (married-married) O carn 98= 5.3 +3.2train +0.33carn 96 + 0.37educ-0.2age +3married + 0.13 train-(earn 96 carn 96) + 0.036 train- (carn96-carn96) + 0.053 train (carn 96- carn96) + 1.15 train (carn 96-carn96) O earn 98 5.3+3.2train +0.33earn 96+0.37educ-0.2age +3married+0.13 train- (age-age) +0.036 train- (age-age) +0.053 train- (age-age)+1.15 train-(age-age) O carn 98=5.3+3.2train +0.33earn 96+0.37educ-0.2age +3married +0.13 earn96-(train-train) +0.036 educ- (train-train) +0.053 age- (train-train) + 1.15 married- (train-train) Using your answer from the preceding question, the estimated average treatment effect of the training program is fure= Which of the following best represents the meaning of the estimated average effect of the training program? O The training program led to an increase in 1998 earnings of $3,200. O The training program led to a decrease in 1998 earnings of $3,000. O The training program led to an increase in 1998 earnings of $1,150. O The training program led to an increase in 1998 earnings of $200.