By Dom DiFurio

Americans have long understood that their birthplace can significantly affect their futures, and academics have increasingly been able to connect tangible early life factors like where they live and the friendships they've cultivated with potential future income.

Among the most recent studies shedding light on what's known as economic mobility—a person's ability to move themselves and their families up the socioeconomic ladder over their lifetime—are a series of papers authored by Harvard University researchers leveraging vast troves of social networking data.

Wealth Enhancement Group used data from Harvard University's Social Capital Atlas project to identify where in the U.S. children have the best (and worst) chances at upward economic mobility.

The research draws on a privacy-protected dataset representing 21 billion friendships from Facebook made public through its parent company Meta's Data for Good project. It also uses anonymous tax records, according to the authors. The scholars assigned a score to locales according to how economically connected low- and high-income people living in the area have historically been over at least a decade, per that data. The dataset does not include scores for about 180 of the 3,000 or so counties in the U.S.

The research attempts to fill in the gaps of previous efforts to study American economic mobility that did not consider a person's vast social networks nor their importance in creating better lives for themselves and their children.

It turns out the ability to cultivate friendships linking people of different socioeconomic backgrounds with one another is the strongest factor in determining whether a child can surpass the earning potential of their parents, Harvard researchers found. They call this economic connectedness. Economic connectedness is a form of social capital, which is the relationships that allow us to obtain resources and opportunities to gain advantages in life. It's a measure that refers to the degree to which low-income people have connections with people across class lines and are friends with high-income people.

To start planning for your family's future, consult an experienced financial advisor today.

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Where climbing the ladder is most daunting

The authors specifically define economic connectedness as the share of above-median income friends a person earning below median income has on the social media platform.

Many of the counties that score the lowest for economic connectedness are located in places where the typical household income and the size of the overall population are low relative to the rest of the U.S. The lowest-scoring counties for economic connectedness are located in Southern region states—including Georgia, Alabama, the Carolinas, Mississippi, and Florida— and the Texas border, with Mexico.

The study has also shone a light on the racial and ethnic differences in economic mobility. Black and Native American children born into poverty are more likely than white and Latino children to stay there. The counties that rank low in economic connectedness and, therefore, opportunities for upward mobility provide an outline for future work that can improve the lives of people where they currently live through investment and reform.

Read on to see the five counties where children have the least opportunity for upward economic mobility.

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#3,014. Allendale County, South Carolina

Economic connectedness: 0.36 (ranked #3,014 among counties)

Median household income: $31,800

Population: 8,304

• 22.9% white
• 73.2% Black
• 0.2% American Indian and Alaska Native
• 0.8% Asian

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#3,015. Bullock County, Alabama

Economic connectedness: 0.35

Median income: $29,063

Population: 10,386

• 24.8% white
• 69% Black
• 0% American Indian and Alaska Native
• 0.4% Asian

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#3,016. Terrell County, Georgia

Economic connectedness: 0.34

Median income: $38,879

Population: 9,102

• 36.1% white
• 57% Black
• 0.1% American Indian and Alaska Native
• 4.1% Asian

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#3,017. Shannon County, South Dakota

Economic connectedness: 0.33

Median income: $33,192

Population: 13,835

• 4.3% white
• 0% Black
• 94.8% American Indian and Alaska Native
• 0% Asian

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#3,018. Todd County, South Dakota

Economic connectedness: 0.29

Median income: $26,250

Population: 9,434

• 8.3% white
• 0% Black
• 87.4% American Indian and Alaska Native
• 2.9% Asian

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'Connections across class lines'

The link between fewer individuals of higher income in an area and the lower economic connectedness score may suggest it's difficult to be upwardly mobile when there are simply fewer people of greater means for individuals of lower socioeconomic status to befriend.

"Connections across class lines are what appear to matter," Harvard researchers found.

Conversely, counties with higher median incomes tended to also have higher economic connectedness scores—with some caveats. Those connections may provide people with the motivation, opportunities, and access to information that can help them improve their circumstances.

Read on to see the five counties where children have the most opportunity for upward economic mobility.

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#5. Madison County, Idaho

Economic connectedness: 1.28

Median income: $53,498

Population: 50,979

• 91.5% white
• 0.5% Black
• 0.2% American Indian and Alaska Native
• 1.5% Asian

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#4. Morgan County, Utah

Economic connectedness: 1.29

Median income: $112,721

Population: 12,162

• 94.9% white
• 0.7% Black
• 0.2% American Indian and Alaska Native
• 0.2% Asian

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#3. San Francisco County, California

Economic connectedness: 1.31

Median income: $126,187

Population: 865,933

• 43.4% white
• 5.2% Black
• 0.5% American Indian and Alaska Native
• 34.4% Asian

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#2. Douglas County, Colorado

Economic connectedness: 1.35

Median income: $127,443

Population: 351,929

• 85.7% white
• 1.5% Black
• 0.4% American Indian and Alaska Native
• 5.2% Asian

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#1. Rockingham County, New Hampshire

Economic connectedness: 1.35

Median income: $101,683

Population: 312,771

• 93% white
• 0.9% Black
• 0.1% American Indian and Alaska Native
• 2.1% Asian

Story editing by Jeff Inglis. Copy editing by Paris Close. Content provided by Stacker.