When you make a purchase at a retail store by giving your bank an instruction to transfer funds directly from your bank account to the store's bank account, you have most likely made the purchase using

When the marginal cost curve lies below the average cost curve, ________

A) the marginal cost curve is vertical B) the marginal cost curve is horizontal C) the average cost curve slopes downward D) the average cost curve slopes upward

The "interest rate effect" can be described as an increase in the price level that raises the interest rate and chokes off

A) investment and consumption spending. B) government spending. C) government spending and unplanned investment. D) net exports.