(4 The a are inefficient The variances of as will be generally larger than those of the b. estimated from the true model The confidence intervals based on the standard errors of a will be larger than those based on the standard errors of b of the true model The ols estimators are lue but not blue（4）The as are inefficient ——The variances of as will be generally larger than those of the bs estimated from the true model. ——The confidence intervals based on the standard errors of as will be larger than those based on the standard errors of bs of the true model. ∴The OLS estimators are LUE but not BLUE