But in reality, the vast majority of millennials live close to where they grew up, according to a paper released Monday by the U.S. Census Bureau in collaboration with Harvard University.

The paper, based on census and tax data for individuals born between 1984 and 1992, found that by age 26, 80% of young adults had moved less than 100 miles from where they grew up. Just 10% had moved more than 500 miles away.

The researchers were looking at whether the benefits of wage increases go to the local economy. They wanted to see if migration patterns in young adulthood changed when there were more economic opportunities available in one’s hometown or nearby.

They found that higher wages lead to fewer people leaving a so-called “commuting zone,” an area’s local economy where people live and work. For every $1,600 in additional compensation a year, around 99% of the wage gains benefit the community.

The migration patterns of young adults varies greatly depending on race and parental income. Those from low-income families and Black and Hispanic Americans tended to stay closest to home, the paper finds.

On average:

• Asian Americans move 220 miles away from home
• White Americans move 190 miles away from home
• Hispanic Americans move 140 miles away from home
• Black Americans move 130 miles away from home
• Individuals born into top 1% move 325 miles away from home
• Individuals born at the 25th percentile move 160 miles away from home

When reviewing the data as a whole, the “radius of economic opportunity,” as the researchers call it, “is quite narrow,” especially for Black, Hispanic, and low-income Americans. Those who were born in a poorer area tend to stay there into young adulthood.

There are a number of policy takeaways from the report, the researchers write. The results should be considered when thinking about subsidies or other types of investment in communities, like attracting new businesses.