A period in which real GDP in the economy declines for at least six months is referred to as

Which of the following statements is (are) correct? According to real business cycle theory,

a. the desirable monetary policy would appear to be one that results in a slow steady growth in the money supply and, thus, stable prices. b. there is some role for activist monetary stabilization policy of a Keynesian type. c. changes in aggregate demand cannot impact output. d. Both a and b e. Both a and c

Sample selection bias

A) occurs when a selection process influences the availability of data and that process is related to the dependent variable. B) is only important for finite sample results. C) results in the OLS estimator being biased, although it is still consistent. D) is more important for nonlinear least squares estimation than for OLS.