In this paper, the authors discuss the second order asymptotic efficiency of estimators of [beta] based on MLE for Y=X[beta]+g(T)+[epsilon], where X,T, [epsilon] are independent, g is unknown, [epsilon] [approximate] [phi](·) is known with mean 0 and variance [sigma]2.

The decline in the growth rate of the national economy as shown in the statistics of the first half of 1986 has aroused the concern of theoreticians. Some people regard this as a danger signal and cast blame on the policy of macroeconomic control carried out since 1985. Others believe that a...