Why US corporations are hoarding cash and not investing (Paul Krugman)

In dozens of cases between 1945 and 1981, antitrust officials forced large companies like AT&T, RCA, IBM, GE, and Xerox to make available, for free, the technologies they had developed in-house or gathered through acquisition. Over the thirty-seven years this policy was in place, American entrepreneurs gained access to tens of thousands of ideas—some patented, some not—including the technologies at the heart of the semiconductor. The effect was transformative. In Inventing the Electronic Century, the industrial historian Alfred D. Chandler Jr. argued that the explosive growth of Silicon Valley in subsequent decades was largely set in motion by these policies and the "middle-level bureaucrats" in the Justice Department’s Antitrust Division who enforced them in the field.