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Introductory Econometrics 4th Edition by Jeffrey Wooldridge
Edition 4ISBN: 978-0324660609Introductory Econometrics 4th Edition by Jeffrey Wooldridge
Edition 4ISBN: 978-0324660609 Exercise 21
To test the effectiveness of a job training program on the subsequent wages of workers, we specify the model 
where train is a binary variable equal to unity if a worker participated in the program. Think of the error term u as containing unobserved worker ability. If less able workers have a greater chance of being selected for the program, and you use an OLS analysis, what can you say about the likely bias in the OLS estimator of 1 (Hint: Refer back to Chapter 3.)
where train is a binary variable equal to unity if a worker participated in the program. Think of the error term u as containing unobserved worker ability. If less able workers have a greater chance of being selected for the program, and you use an OLS analysis, what can you say about the likely bias in the OLS estimator of 1 (Hint: Refer back to Chapter 3.)
Explanation
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So, the above expre...
Introductory Econometrics 4th Edition by Jeffrey Wooldridge
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