Rodrigo Mariscal

Ali Alichi

Daniela Muhaj

Data show that middle-income households have continued moving down, and less so up, the income distribution in the United States since the 1970s—a phenomenon that is often referred to as the polarization or “hollowing out” of the income distribution. While the level of income polarization is generally lower in the richer states (i.e., those with higher median household income levels), there have been wide variations in the changes in income polarization over time across states. The paper develops two indices to measure income polarization including a novel hollowing-out index. Another important contribution of the paper is to examine the proximate causes of income polarization. The econometric analysis is done at both state and household levels. The results suggest that technology, measured by job routinization, and international trade, measured by job offshoring, can fully explain the non-trend rise in income polarization, with broadly equal contributions. Household characteristics, including age, education, race, and gender have also been important drivers but with a net countervailing effect on income polarization. This is mainly thanks to the rising education level of households, which has led to better incomes.

Hollowing Out: The Channels of Income Polarization in the United States

Anna Ivanova

Dyna Heng

Joyce Wong

Ms.Uma Ramakrishnan

This paper examines the state of financial development in the Latin America and Caribbean (LAC) region as well as potential growth and stability implications from further development. The analysis suggests that access to financial institutions has expanded notably in the past decade, and the region compares favorably with other emerging market regions on this dimension. The region, however, continues to lag behind peers on broader financial development, especially with respect to markets, though there is substantial heterogeneity across countries. Financial systems in many LAC countries are also underdeveloped relative to their macroeconomic fundamentals. Further financial development could convey net benefits to the region, provided there is adequate regulatory oversight to prevent excesses.

Rodrigo Mariscal

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