Tax "Holidays" on Back to School Supplies

http://www.npr.org/templates/story/story.php?storyId=128983150&f=1002&sc=igg2
Several states are initiating a "tax holiday" on back to school supplies, hoping that shoppers coming in to take advantage of the tax removal will also shop for other items, which will remain taxable. Will the idea boost sales and state revenues? Many analysts don't believe so...