James P. Ziliak

Decomposing trends in income volatility: The 'wild ride' at the top and bottom

We provide a detailed accounting of the trend increase in family income volatility in recent decades by quantifying the contributions of household head earnings, spouse earnings, non-transfer non-labor income, transfer income, and tax payments (inclusive of the refundable Earned Income Tax Credit), along with covariances among the income components. Using twoyear matched panels in the Current Population Survey from 1980 to 2009, we find that the volatility of family income, as measured by the variance of the arc percent change, doubled over the past three decades.

On persistent poverty in a rich country

We examine differences in income within the U.S., and the regions of persistent poverty that have arisen, using a newly assembled dataset of counties that links historical 19th century Census data with contemporaneous data. The data, along with an augmented human capital growth model, permit us to identify the roles of contemporaneous differences in aggregate production technologies and factor endowments, in conjunction with the historical roles of institutions, culture, geography, and human capital.

Recent developments in antipoverty policies in the United States

I survey recent developments in antipoverty policy in the United States over the past decade and examine how the safety net and tax system affects poverty and its correlates using data from the 2000 to 2010 waves of the Current Population Survey-Annual Social and Economic Supplement. Unlike the 1980s and 1990s, and until the health care overhaul in 2009, the first decade of the 21st Century was relatively tepid in terms of major transfer policy reforms.

Food insecurity among older adults

Reducing hunger risk among older Americans requires a concerted policy effort that is informed by rigorous research on the extent, causes, and consequences of food insecurity. In this report we provide a comprehensive portrait of the causes and consequences of food insecurity among adults age 50-59 in comparison to those in their 40s and those 60 and older.

Earnings volatility in America: Evidence from matched CPS

We offer new evidence on earnings volatility of men and women in the United States over the past four decades by using matched data from the March Current Population Survey. We construct a measure of total volatility that encompasses both permanent and transitory instability, and that admits employment transitions and losses from self employment. We also present a detailed decomposition of earnings volatility to account for changing shares in employment probabilities, conditional variances of continuous workers, and conditional mean variances from labor-force entry and exit.

The Appalachian Regional Development Act and economic change

The Appalachian Regional Development Act of 1965 is one of the longest serving place-based regional development programs in the U.S., and is the largest in terms of geographic scope. I use county-level data from the 1960 thru 2000 Decennial Censuses to evaluate the effect of ARDA on poverty rates and real per capita incomes in Appalachia. The intent to treat parameter is identified in a difference-in-difference-in-difference framework by comparing outcomes in Appalachia to her border counties.

Senior hunger in the United States: Differences across states and rural and urban areas

Many pressing questions remain regarding the extent, causes, and consequences of senior hunger in America.  Is the threat of senior hunger common across all states in the nation?  Are there differences in hunger risk across urban and rural areas?  In this follow-up study to our 2008 report entitled The Causes, Consequences, and Future of Senior Hunger in America we document the geographic distribution of senior hunger across states and metropolitan location.