Assuming all else equal, if the labor demand curve shifts to the left and the labor supply curve remains unchanged, ________

The period over which a call or put option exists is

A) determined by its delivery date. B) determined by its expiration date. C) determined by whether the contract is written for a commodity or for a financial instrument. D) indeterminate; options contracts continue in existence until either the buyer or the seller desires to discontinue it.

If the tax function is given by T = – 20 + 0.1Y the average tax rate would

a. be 0.1. b. fall as income falls. c. vary negatively with income. d. be – 20 + 0.1. e. none of the above