Kohlberg Kravis Roberts & Co. (KKR) played the lead role in pursuing large-scale leveraged buyouts in the U.S. market for corporate control in the 1980s by taking advantage of investment opportunities created by three decades of public policies regarding antitrust, pensions, corporate governance, and banking. KKR's innovations were its ability to overcome investors' collective action and monitoring problems by arranging takeovers through limited partnerships and by managing acquired firms through shared equity ownership with management. These organizational innovations, when combined with the financial changes of the 1980s, allowed KKR and its investor-controlled associations to challenge managerially controlled firms.