Question: A suitable instrumental variable is one that is correlated with the independent variable and affects the dependent variable only through changes in the independent variable.

A suitable instrumental variable is one that is correlated with the independent variable and affects the dependent variable only through changes in the independent variable. Suppose that you are interested in studying the effects of years of education (educ) on hourly wage (wage). You consider the following regression model: wage = g +1educ + it Which of the following would make the best instrumental variable for educ? " Financial aid availability in the individual's state ' Height ' Work ethic Natural ability
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