Nordhaus has suggested that countries form what he calls Climate Clubs.11 As with other kinds of clubs, such as a tennis club, members would enjoy certain benefits (use of the courts), but would also have to agree to the club rules (no racket throwing, paying dues on time). Failure to follow the rules can get you kicked out of the club. The key to the Climate Club idea, however, is that countries that do not agree to join and follow the rules would be subject to punishment by club members (perhaps via some kind of tariff).
