The "dual" nature of our banking system got its start in the

Under imperfect multicollinearity

A) the OLS estimator cannot be computed. B) two or more of the regressors are highly correlated. C) the OLS estimator is biased even in samples of n > 100. D) the error terms are highly, but not perfectly, correlated.

________ recessions pose major macropolicy dilemmas.

Fill in the blank(s) with the appropriate word(s).