Which of the following is a reason why estimating the slope and intercept of a simple linear regression line using the least absolute deviations (LAD) approach is not as common as OLS?
A. LAD suffers from heteroskedasticity.
B. The solution for LAD isn't always unique.
C. The objective function for LAD is less intuitive than for OLS.
D. Taking the absolute value of residuals in most software programs is difficult.
Answer: B
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