The Logic of Collective Action: Public Goods and the Theory of Groups, Second printing with new preface and appendix (Harvard Economic Studies)

Get your workout on track with the Timex fitness tracker watch. The lightweight transmitter clips to the waist and communicates wirelessly to the watch for ultimate performance. Black resin strap and round case. Digital dial features pace, steps, distance and calories burned. Quartz movement. Water resistant to 50 meters. One-year limited warranty.

Get in touch with your dark side. Watch by Emporio Armani crafted of black ion-plated stainless steel and gray silicone bracelet and round black ion-plated stainless steel case. Textured black chronograph dial features applied stick indices, minute track, three subdials, date window at three o'clock, three hands and logo. Quartz movement. Water resistant to 50 meters. Two-year limited warranty.