This book examines the International Monetary Fund's (IMF) conditional lending, and particularly why each of the three core elements of its lending arrangements—the amount of credit granted to borrowing governments, the number of conditions attached to the loans, and the rigor with which the conditions are enforced—vary significantly. Drawing on both theory and evidence, it shows that shared economic beliefs strongly influence the character of the IMF's relations with its borrowers. The book argues that economic policymakers at both the international and domestic levels rely on shared economic beliefs for guidance in the presence of uncertainty, and that the IMF decision makers' neoliberal ideas are deeply embedded in the organizational culture. It also discusses three testable mechanisms linking shared beliefs to variations in loan size, conditionality, and enforcement. Finally, it explains how the IMF, through its conditional lending programs, influences who governs the economy.