Jan Tinbergen, a Nobel laureate in Economics, investigates the complex factors contributing to income disparities across nations and within societies. This seminal work, drawing on his extensive experience in economic modeling and policy analysis, presents a framework for understanding the historical, structural, and policy-driven elements that perpetuate or alleviate income inequality.

Jan Tinbergen's work is recognized for its foundational contributions to the study of income distribution. His rigorous analytical approach and policy-oriented insights have informed subsequent economic research and policy debates on inequality. The book is considered a significant academic text for understanding the economic underpinnings of global and national income disparities.