The growth rate of business investment in information technology boomed in the 1990s and 2000 before plunging in 2001. This boom and bust raises some natural questions: what were the reasons for the accentuated swings in growth rates, and, more importantly, what do those reasons portend for the future of IT investment? Much of the increase in IT investment in the late 1990s appears to be attributable to falling prices of IT goods, which in turn is largely attributable to technological change. However, IT investment was much higher in 1999 and 2000 than a model would predict. Another reason for the high growth rates in IT investment was that expectations were too high, especially in two sectors of the economy, telecommunications services and the dot-com sector. Looking ahead, technological change in the IT area will likely continue to move quickly, in large part because large amounts of research and development are being devoted to finding further technological breakthroughs.