OECD, Divided We Stand: Why Inequality Keeps Rising（2011年）

In the three decades prior to the recent economic downturn, wage gaps widened and household income inequality increased in a large majority of OECD countries. This occurred even when countries were going through a period of sustained economic and employment growth. This report analyses the major underlying forces behind these developments:

An Overview of Growing Income Inequalities in OECD Countries
Special Focus: Inequality in Emerging Economies
Part I. How Globalisation, Technological Change and Policies Affect Wage and Earnings Inequalities
Part II. How Inequalities in Labour Earnings Lead to Inequalities in Household Disposable Income
Part III. How the Roles of Tax and Transfer Systems Have Changed