MacArthur Genius Raj Chetty Talks Economic Opportunity Creation | Global Conference 2024

National Mobility Trends:

• 92% of children born in 1940 earned more than their parents by age 35.
• This probability dropped to approximately 50% for children born in the mid-1980s.
• The decline in mobility correlates with increased public frustration regarding the ease of upward advancement through hard work.
• Research utilizes anonymized tax return data for 20 million children born in the early 1980s to measure these trends.

Spatial Variation and Neighborhood Effects:

• Upward mobility varies significantly across hyper-local neighborhoods, even within the same city (e.g., two miles apart in New York City).
• Low-income children in rural Iowa (e.g., Dubuque) have a high probability of reaching the middle class, with adult incomes averaging $45,000–$50,000.
• Conversely, low-income children in Charlotte, North Carolina, earn less on average than their parents did.
• Moving to a high-opportunity neighborhood increases adult income in proportion to the number of years spent growing up there, indicating a causal effect of place.

Predictors of Upward Mobility:

• Neighborhoods with high mobility rates typically exhibit four characteristics: low poverty rates, income integration, stable two-parent family structures, and better K-12 educational access.
• A fifth, critical factor is "social capital," defined as cross-class interactions and economic connectedness.
• Analysis of Facebook data from 72 million users identifies "economic connectedness" (low-income individuals being friends with high-income individuals) as the single strongest predictor of upward mobility.
• Mechanisms for this effect include job referrals and the shaping of aspirations through exposure to successful role models.

Policy Interventions and Housing Vouchers:

• Current usage of $45 billion annually in affordable housing vouchers often clusters recipients in low-opportunity ("red") areas rather than high-opportunity ("green") areas.
• A randomized trial in Seattle (1,000 families) provided social capital support and brokerage services to help families move.
• In the treatment group, over 50% of families moved to high-opportunity areas compared to 14% in the control group.
• Children in the treatment group are estimated to earn $200,000 more over their lifetimes due to this intervention.
• The $2,500 cost of the brokerage assistance represents only 2% of the voucher's value but yields massive long-term returns.
• Congress has authorized $80 million to replicate the Seattle model in nine cities and is considering a $5 billion annual expansion of housing vouchers with integrated mobility support.

Place-Based Investment and Private Sector Role:

• Transforming low-opportunity areas into high-opportunity areas ("place-based investment") remains less scientifically understood than migration strategies.
• Charlotte invested approximately $200 million in programs ranging from pre-K readiness to mentoring following its identification as the 50th lowest mobility city among major US urban centers.
• Bank of America committed to hiring 1,000 low-income Charlotte residents, partnering with "Year Up" to provide job training skills.
• An evaluation of the Year Up program using tax data showed that participants' earnings surged and remained 35% higher than non-participants for years following the program.

Innovation and Economic Growth:

• Children from the top 1% of the income distribution are 10 times more likely to become inventors than those from low-income families.
• Researchers term this loss of talent "lost Einsteins," estimating that if inventors were distributed equally across race and class, the US would have four times its current number of inventors.
• Increasing mobility is framed as essential not only for fairness but for generating the talent required to drive future economic growth and technological innovation.

Future Research and Global Application:

• Opportunity Insights will soon release data analyzing how economic opportunity trends by race and class, expected to reveal striking disparities.
• The organization is collaborating with the Milken Center to establish a framework for rigorously evaluating public and philanthropic programs to determine their rates of return.
• Researchers have replicated the mobility mapping methodology in India, Brazil, and Scandinavian countries to address similar inequality issues globally.