Problem 49 of 333HardStatisticsP049

Omitted variable bias direction

True model $y = \beta_1 x_1 + \beta_2 x_2 + \epsilon$ . You omit $x_2$ and regress $y$ on $x_1$ alone. When is $\hat{\beta}_1$ biased upward?
See the hint and solution with a free account
Every problem on Quant Engine is free, with a hint and a full worked solution. Making an account takes 30 seconds and no card. Then you can see them and track what you have solved.
Create a free account Log in

See the hint and solution with a free account