Which of the following are examples of first-degree, second-degree, or third-degree price discrimination?
a) The publishers of the Journal of Price Discrimination charge a subscription price of $75 per year to individuals and $300 per year to libraries.
b) The U.S. government auctions off leases on tracts of land in the Gulf of Mexico. Oil companies bid for the right to explore each tract of land and to extract oil.
c) Ye Olde Country Club charges golfers $12 to play the first 9 holes of golf on a given day, $9 to play an additional 9 holes, and $6 to play 9 more holes.
d) The telephone company charges you $0.10 per minute to make a long-distance call from Monday through Saturday and $0.05 per minute on Sunday.
e) You can buy one computer disk for $10, a pack of 3 for $27, or a pack of 10 for $75.
f) When you fly from New York to Chicago, the airline charges you $250 if you buy your ticket 14 days in advance, but $350 if you buy the ticket on the day of travel.