In common value auctions
a. every bidder know the value of the object being sold
b. each bidder makes the same estimate of the value of the good
c. bidders do not know the estimates of the others
d. the true value of the item differs across bidders

He interest rate effect is the change in real gdp caused by the federal reserve adjusting target interest rates. is the change in consumer and investment spending due to changes in interest rates resulting from changes in the aggregate price level. is the change in exports and imports, resulting from changes in the interest rate caused by changes in the aggregate price level. is the change in investment spending and government purchases caused by changes in money demand. is the change in interest rates, caused by changes to government purchases.