Because it is a. neither excludable nor rival in consumption, a tornado siren is a public good. b. excludable but not rival in consumption, a tornado siren is produced by a natural monopoly. c. neither excludable nor rival in consumption, a tornado siren is a common resource. d. rival in consumption but not excludable, a tornado siren is a common resource.

When a shortage or a surplus arises in the loanable funds market a. the supply of loanable funds changes to return the economy to its original real interest rate b. the nominal interest rate is pulled to the new equilibrium level c. the demand for loanable funds changes to return the economy to its original real interest rate d. the real interest rate is pulled to the new equilibrium level

Arnold rossiter is a 40-year-old employee of the barrington company who will retire at age 60 and expects to live to age 75. the firm has promised a retirement income of $20,000 at the end of each year following retirement until death. the firm's pension fund is expected to earn 7 percent annually on its assets and the firm uses 7% to discount pension benefits. what is barrington's annual pension contribution to the nearest dollar for mr. rossiter? (assume certainty and end-of-year cash flows.)

Describe how to write a main idea expressed as a bottom-line statement