Tax cuts can have a strong impact on economic growth, or none at all--it depends on whether the tax cut encourages private sector investment. IPI Resident Scholar Dr. Merrill Matthews and President Tom Giovanetti look back at the IPI archives to a 2001 study that ranked different types of tax cuts based on their impact on economic growth. Hint: Tax cuts designed to "put more money in people's pockets" aren't going to get the job done.