The article reviews over 50 studies on the impact of IT investment on productivity. It shows that investing in IT leads to higher productivity and economic growth at both the firm and country levels. The research refutes the idea of a productivity paradox and highlights the importance of complementary investments in organizational capital for maximizing the benefits of IT. Despite a decrease in IT investment in the early 2000s, the returns from IT investments are real and continue to drive innovation and productivity gains in companies.