Students: If your book did not come with a MyEconLab Student Access Kit, you can purchase access online with a credit card. Go to http://www.myeconlab.com/perloff/index.html and select purchase access to MyEconLab if your instructor has given or will give you a Course ID (a Course ID looks like "smith2345" and can only be given to you by your instructor), or select purchase access to the Companion Website if your instructor will not be giving you a Course ID.