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Downward mobility: Where middle-class kids are worse off than their parents

An American flag flies July 5, 2017, at Barry Farm, a Washington D.C. housing development that is to be demolished and rebuilt into multi-income housing. Washington Post photo by Michael Robinson Chavez.

A team of economists led by Raj Chetty of Harvard University has released a massive new data set on prosperity at the neighborhood level in the United States. Called the Opportunity Atlas, the data builds on Chetty and company's previous work on inequality and opportunity, tracing, block by block, how the environments children grow up in shape who they become as adults.

Much of the focus in media and policy circles has been on the plight of children from low-income families, and the social and economic barriers preventing them from pulling themselves out of poverty. But the data strongly suggests that the same forces holding lower-class kids back are creating difficulties for middle- and upper-class families, as well.

Consider, a child born between 1979 and 1983 to a middle-class family with an income right in the middle of the U.S. income distribution - what economists call the 50th income percentile, or about $55,000 in 2015 dollars. Because family income has a huge effect on children's eventual outcomes as adults, we'd expect that child to end up more or less in the 50th income percentile when they grow up.

At the national level, that's true: The average child born to a 50th percentile family in the early 1980s ends up exactly at the 50th percentile today. But if you drill down beyond the national average, you find that children's outcomes vary significantly by where they grew up. In some parts of the country, middle-income children tend to end up much higher in the income distribution than their parents' level. In these places, the dream of ending up better off than your parents is still very much alive.

In other places, however, middle-income children tend to end up worse off than their parents. Sometimes, significantly so.

On average, kids in the Northern Plains, the Mountain West, and parts of the Northeast end up better off than their parents. Kids in much of the Southeast, Southwest and Alaska, on the other hand, end up worse.

The effect of geography on children's outcomes is fairly significant. In nearly every county in the Carolinas, Florida and Georgia, for instance, the typical middle-class kid ends up several notches down the economic ladder from their parents. In places states such as Iowa, Minnesota and the Dakotas, on the other hand, the opposite is true.

Although the national-level averages mask substantial county-level variation, these country-level figures in turn mask considerable differences at the level of neighborhood. By linking up detailed tract-level census data with millions of individual income tax returns filed between 1989 and 2015, Chetty and his team traced these outcomes down to a precise level of geographic detail.

The Opportunity Atlas data shows that these patterns aren't just apparent among middle-class kids. The same places that have better outcomes for middle-class kids also tend to have better outcomes for poor and upper-class kids, too. When it comes to neighborhoods, what's good for poor and middle-class kids seems to be good for rich ones as well. Rising geographic tides lift all economic boats.

Another important thing to note: Until a few weeks ago, these data sets didn't even exist. The implication is that our understanding of how places shape who we are and how we live is still in its infancy.

This article was written by Christopher Ingraham, a reporter for The Washington Post.

  
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