Improving the labor market and encouraging work are central to our goals of achieving greater responsibility and opportunity in America. The private economy is the arena where most Americans work hard to realize their dreams.

But employment today is failing to achieve the promise it did a few decades ago. Wages of unskilled workers have been fairly stagnant in real terms (especially among men) and have fallen relative to those of more-educated workers; and some groups of Americans (like less-educated men generally and black men, specifically) are working considerably less than they once did.

Stagnant wages and low work participation among some groups of workers are blocking progress. Both must be addressed.

In Chapter 4 of a new report from the AEI-Brookings Working Group on Poverty and Opportunity, the Working Group recommends policies that:

1. Expand opportunities for the disadvantaged by improving their skills;
2. Make work pay better than it does now for the less educated;
3. Expand both work requirements and opportunities for the hard-to-employ while maintaining an effective work-based safety net for the most vulnerable members of our society, especially children; and
4. Make more jobs available.

Downloads

• Download Chapter 4: Work
• Explore the full report

Stephen was still a teenager on the north side of St. Louis when his dad, a police officer, was killed during a robbery in their neighborhood. Despite the trauma, Stephen later joined the police force to continue his dad’s legacy and commitment to safe and inclusive neighborhoods. But even before the fatal shooting of Michael Brown in Ferguson in 2014, Stephen (not his real name) yearned to right local wrongs through broader approaches. “The darkest forces weren’t necessarily the ones getting arrested,” he observed. “So I retired from the police force after 22 years, essentially to chase after a different type of perpetrator.” Wanting to focus on policies at multiple levels of government that “were causing the disparities that fueled increasing crime and violence in St. Louis,” Stephen pivoted to civil rights enforcement, tracking policy violations and innovations at a government agency in the St. Louis region.

I met Stephen in February while in St. Louis for a conference his agency organized on HUD’s recently strengthened Affirmatively Furthering Fair Housing (AFFH ) rule, which increases local accountability in promoting residential integration. He wasn’t a speaker at the event, but hearing his story reinforced the importance of combating the deeply entrenched and often invisible causes of segregation.

Recent events and new academic research, including landmark findings by Raj Chetty and colleagues testifying to the benefits of low-poverty neighborhoods for low-income kids, the updated AFFH rule, and the Supreme Court’s disparate impact decision upholding other tools to fight segregation have brought renewed attention to these challenges. Meanwhile, underlying these developments, poverty has failed to decline since the recession and, as recent Brookings research shows, has become more concentrated in neighborhoods of extreme poverty.

How can regional leaders and practitioners respond to these challenges? I was in St. Louis to discuss one part of the solution—advancing more mixed-income neighborhoods. In the Chicago region, our housing and community development-focused firm, BRicK Partners, is collaborating with the Chicago Metropolitan Agency for Planning (CMAP), the Illinois Housing Development Authority (IHDA), and 10 metropolitan Chicago public housing authorities, with support and leadership from HUD, to develop and operate the Regional Housing Initiative (RHI)

RHI is a small, systemic, and potentially scalable “work around” of a very specific set of programs and policies that contribute inadvertently to regional inequities. A flexible and regional pool of resources working across the many traditional public housing authority (PHA) and municipal jurisdictions in the Chicago region, RHI increases quality rental housing in neighborhoods with good jobs, schools, and transit access and provides more housing options to households on Housing Choice Voucher (HCV) waiting lists. Recognizing that the federal formulas allocating HCVs to each individual PHA are not responsive to population, employment, or poverty trends, RHI partners convert and pool a small portion of their HCVs to provide place-based operating subsidies in support of development activity that advances local and regional priorities. RHI supports both opportunity areas with strong markets and quality amenities as well as revitalization areas where public and private sector partners are planning and investing toward that end. In both cases, the bulk of RHI investments are in the suburbs, where the PHAs are smaller and the rental stock more limited. 

RHI has committed over 550 RHI subsidies to nearly 40 mixed-income and supportive housing developments across Chicagoland, supporting more than 2,200 total apartments, over half of which are in opportunity areas. The pooling and transferring of subsidies has allowed RHI to support proposals that local jurisdictions wouldn’t be able to undertake otherwise.

Although a number of innovative programs around the country provide assistance to households moving to opportunity areas, RHI is unique its focus on increasing the supply of housing in opportunity areas regionwide. Its approach is consistent with lessons learned from Brookings’ work on Confronting Suburban Poverty in America: With CMAP as a strong quarterback, RHI has addressed the shortage of rental housing in the suburbs by working across jurisdictions, developing shared priorities, metrics and selection criteria, and by working with IHDA and other stakeholders to leverage greater private sector investment.

This recipe for success is now being deployed in communities beyond Chicago. Baltimore is preparing to advertise for its first round of developer applicants under the leadership of the Baltimore Metropolitan Council, with regionwide PHAs, the State Housing Finance Agency, and a regional housing counselor lined up as supportive partners. In St. Louis, the regional planning and housing finance organizations both attended the February conference where I met Stephen, signaling the potential for greater collaboration for both these entities and the PHAs.

Like many housing advocates and professionals, my colleagues and I at BRicK Partners derive a lot of satisfaction from supporting communities like Baltimore and St. Louis and individuals like Stephen and his peers with replicable best practices. Given today’s political realities, we don’t expect major changes in the federal formulas and statutes behind some of the regional inequities, but “work arounds” such as RHI can still scale up. Nationwide, just a small percentage of HCVs have been converted for such flexible supply-side solutions, but there is reason to be hopeful that this will change. The Regional Mobility Demonstration proposed in the 2017 budget as well as federal public housing voucher legislation passed by the House of Representatives earlier this year are signs that there is real momentum to advance regional strategies that increase access to opportunity for low income residents and families. 

MEDIA RELEASE

Low-Income Boys in Higher Inequality Areas Drop Out of School More Often than Low-Income Boys in Lower Inequality Areas, Limiting Social Mobility, New Brookings Paper Finds
“Economic despair” may contribute if those at the bottom do not believe they have the ability to achieve middle class status

Greater income gaps between those at the bottom and middle of the income distribution lead low-income boys to drop out of high school more often than their counterparts in lower inequality areas, suggesting that there is an important link between income inequality and reduced rates of upward mobility, according to a new paper presented today at the Brookings Panel on Activity. The finding has implications for social policy, implying a need for interventions that focus on bolstering low-income adolescents' perceptions of what they could achieve in life.

In “Income Inequality, Social Mobility, and the Decision to Drop Out Of High School,” Brookings Nonresident Senior Fellow and University of Maryland economics professor Melissa S. Kearney and Wellesley economics professor Phillip B. Levine propose a channel through which income inequality might lead to less upward mobility—often assumed to be the case but not yet fully proven. The conventional thinking among economists is that income inequality provides incentives for individuals to invest more in order to achieve the higher income position in society, but Kearney and Levine observe that if low-income youth view middle-class life as out of reach, they might decide to invest less in their own economic future.

See an interactive map of inequality by state, plus more findings »

The authors focus on income inequality in the lower half of the income distribution, as measured by income gaps between the 10th and 50th percentiles of the income distribution rather than income gaps between the the top and bottom of the income distribution, which has been more of a focus in popular culture. They show this "lower-tail" inequality is more relevant to the lives of poor youth because the middle is a more realistic ambition. Furthermore, their research could reconcile a puzzle: social mobility does not appear to be falling, despite the rise in income inequality. But, as Kearney and Levine point out, U.S. income inequality has been rising because the top of the distribution has been pulling away from the middle, not because the bottom is falling farther behind the middle.

The authors look specifically at high school drop-out rates through a geographic lens, noting the link between highly variable rates of high school completion and income inequality across the country. One-quarter or more of those who start high school in the higher inequality states of Louisiana, Mississippi, Georgia, and the District Columbia fail to graduate in a four-year period, as compared to only around 10 percent in Vermont, Wisconsin, North Dakota, and Nebraska—lower inequality states. Their econometric analysis goes on to show that low-income youth—boys in particular—are 4.1 percentage points more likely to drop out of high school by age 20 if they live in a high-inequality location relative to those who live in a low-inequality location.

Kearney and Levine examine a number of potential explanations for this link, including differences in educational inputs, poverty rates, demographic composition, and other factors. Ultimately, the evidence suggests that there is something specific about areas with greater income gaps that lead low-income boys there to drop out of school at higher rates than low-income boys elsewhere. The authors' research suggests that adolescents make educational decisions based on their perceived returns to investing in their educational development: a greater distance to climb to get to the middle of the income distribution could lead to a sense that economic success is unlikely—what they term “economic despair.”

"Income inequality can negatively affect the perceived returns to investment in education from the perspective of an economically disadvantaged adolescent,” they write. “Perceptions beget perceptions."

Digging into reasons students themselves give for dropping out, they find that low-income students from more unequal places are more likely to give up on their educational pursuits. Surprisingly, survey evidence shows that academic performance does not have as large an impact on low-income students in high inequality states: 51 percent of dropouts in the least unequal states reported that they dropped out because they were performing poorly, as compared to only 21 percent of students who dropped out in the most unequal states.

The finding suggests that economic despair could play an important role: if a student perceives a lower benefit to remaining in school, then he or she will choose to drop out at a lower threshold of academic difficulty. They also note that while the wage premium of completing high school should reduce the dropout rate, household income inequality has an offsetting negative effect.

The choice between staying in school and dropping out may reflect actual or perceived differences from the benefits of graduating. For instance, the authors note their past research showing that youth from low-income households who grow up in high lower-tail inequality states face lifetime incomes that are over 30 percent lower than similar children in lower inequality states. They also highlight other research showing that the overwhelming majority of 9th graders aspire to go to college, but by 11th grade, low-SES students are substantially less likely to expect they will enroll in college, even among those students with high test scores.

"There are important policy implications for what types of programs are needed to improve the economic trajectory of children from low-SES backgrounds," they write. "Successful interventions would focus on giving low income youth reasons to believe they have the opportunity to succeed. Such interventions could focus on expanded opportunities that would improve the actual return to staying in school, but they could also focus on improving perceptions by giving low-income students a reason to believe they can be the "college-going type." For example, interventions might take the form of mentoring programs that connect youth with successful adult mentors and school and community programs that focus on establishing high expectations and providing pathways to graduation. They could also take the form of early-childhood parenting programs that work with parents to create more nurturing home environments to build self-esteem and engender positive behaviors."

Read the full paper from Kearney and Levine here »

Downloads

• Download the full paper

Video

• How “economic despair” affects high school graduation rates for America’s poorest students

Ryan’s EITC is pro-mobility… but funding it may not be

Paul Ryan seems to be thinking seriously about the issues of poverty and social mobility. He is a reformer as well as an authentic conservative.

While his willingness to embrace EITC expansion is welcome, his proposed funding methods raise serious questions. Paying for anti-poverty programs by cutting anti-poverty programs runs the risk of being self-defeating. No doubt some of them are not working as intended. But reform is the answer, rather than abolition. Many of these programs help those in the deepest poverty - who in many cases are those least likely to benefit from welfare-to-work policies such as the EITC, according to recent research from the Center for Budget and Policy Priorities and from the National Poverty Center. 

Ryan's package is worthy of serious attention, not least from the perspective of social mobility. It is important, however, not to consider the impact of the EITC expansion alone, but also how - and by whom- it will be paid for. 

As a rhetorical ideal, greater opportunity is hard to beat. Just about all candidates for high elected office declare their commitments to promoting opportunity – who, after all, could be against it? But opportunity is, to borrow a term from the philosopher and political theorist Isaiah Berlin, a "protean" word, with different meanings for different people at different times.

Typically, opportunity is closely entwined with an idea of upward mobility, especially between generations. The American Dream is couched in terms of a daughter or son of bartenders or farm workers becoming a lawyer, or perhaps even a U.S. senator. But even here, there are competing definitions of upward mobility.

It might mean being better off than your parents were at a similar age. This is what researchers call "absolute mobility," and largely relies on economic growth – the proverbial rising tide that raises most boats.

Or it could mean moving to a higher rung of the ladder within society, and so ending up in a better relative position than one's parents.

Scholars label this movement "relative mobility." And while there are many ways to think about status or standard of living – education, wealth, health, occupation – the most common yardstick is household income at or near middle age (which, somewhat depressingly, tends to be defined as 40).

As a basic principle, we ought to care about both kinds of mobility as proxies for opportunity. We want children to have the chance to do absolutely and relatively well in comparison to their parents.

On the One Hand…

So how are we doing? The good news is that economic standards of living have improved over time. Most children are therefore better off than their parents. Among children born in the 1970s and 1980s, 84 percent had higher incomes (even after adjusting for inflation) than their parents did at a similar age, according to a Pew study. Absolute upward income mobility, then, has been strong, and has helped children from every income class, especially those nearer the bottom of the ladder. More than 9 in 10 of those born into families in the bottom fifth of the income distribution have been upwardly mobile in this absolute sense.

There's a catch, though. Strong absolute mobility goes hand in hand with strong economic growth. So it is quite likely that these rates of generational progress will slow, since the potential growth rate of the economy has probably diminished. This risk is heightened by an increasingly unequal division of the proceeds of growth in recent years. Today's parents are certainly worried. Surveys show that they are far less certain than earlier cohorts that their children will be better off than they are.

If the story on absolute mobility may be about to turn for the worse, the picture for relative mobility is already pretty bad. The basic message here: pick your parents carefully. If you are born to parents in the poorest fifth of the income distribution, your chance of remaining stuck in that income group is around 35 to 40 percent. If you manage to be born into a higher-income family, the chances are similarly good that you will remain there in adulthood.

It would be wrong, however, to say that class positions are fixed. There is still a fair amount of fluidity or social mobility in America – just not as much as most people seem to believe or want. Relative mobility is especially sticky in the tails at the high and low end of the distribution. Mobility is also considerably lower for blacks than for whites, with blacks much less likely to escape from the bottom rungs of the ladder. Equally ominously, they are much more likely to fall down from the middle quintile.

Relative mobility rates in the United States are lower than the rhetoric about equal opportunity might suggest and lower than people believe. But are they getting worse? Current evidence suggests not. In fact, the trend line for relative mobility has been quite flat for the past few decades, according to work by Raj Chetty of Stanford and his co-researchers. It is simply not the case that the amount of intergenerational relative mobility has declined over time.

Whether this will remain the case as the generations of children exposed to growing income inequality mature is not yet clear, though. As one of us (Sawhill) has noted, when the rungs on the ladder of opportunity grow further apart, it becomes more difficult to climb the ladder. To the same point, in his latest book, Our Kids – The American Dream in Crisis, Robert Putnam of Harvard argues that the growing gaps not just in income but also in neighborhood conditions, family structure, parenting styles and educational opportunities will almost inevitably lead to less social mobility in the future. Indeed, these multiple disadvantages or advantages are increasingly clustered, making it harder for children growing up in disadvantaged circumstances to achieve the dream of becoming middle class.

The Geography of Opportunity

Another way to assess the amount of mobility in the United States is to compare it to that found in other high-income nations. Mobility rates are highest in Scandinavia and lowest in the United States, Britain and Italy, with Australia, Western Europe and Canada lying somewhere in between, according to analyses by Jo Blanden, of the University of Surrey and Miles Corak of the University of Ottawa. Interestingly, the most recent research suggests that the United States stands out most for its lack of downward mobility from the top. Or, to paraphrase Billie Holiday, God blesses the child that's got his own.

Any differences among countries, while notable, are more than matched by differences within Pioneering work (again by Raj Chetty and his colleagues) shows that some cities have much higher rates of upward mobility than others. From a mobility perspective, it is better to grow up in San Francisco, Seattle or Boston than in Atlanta, Baltimore or Detroit. Families that move to these high-mobility communities when their children are still relatively young enhance the chances that the children will have more education and higher incomes in early adulthood. Greater mobility can be found in places with better schools, fewer single parents, greater social capital, lower income inequality and less residential segregation. However, the extent to which these factors are causes rather than simply correlates of higher or lower mobility is not yet known. Scholarly efforts to establish why it is that some children move up the ladder and others don't are still in their infancy.

Models of Mobility

What is it about their families, their communities and their own characteristics that determine why they do or do not achieve some measure of success later in life?

To help get at this vital question, the Brookings Institution has created a life-cycle model of children's trajectories, using data from the National Longitudinal Survey of Youth on about 5,000 children from birth to age 40. (The resulting Social Genome Model is now a partnership among three institutions: Brookings, the Urban Institute and Child Trends). Our model tracks children's progress through multiple life stages with a corresponding set of success measures at the end of each. For example, children are considered successful at the end of elementary school if they have mastered basic reading and math skills and have acquired the behavioral or non-cognitive competencies that have been shown to predict later success. At the end of adolescence, success is measured by whether the young person has completed high school with a GPA average of 2.5 or better and has not been convicted of a crime or had a baby as a teenager.

These metrics capture common-sense intuition about what drives success. But they are also aligned with the empirical evidence on life trajectories. Educational achievement, for example, has a strong effect on later earnings and income, and this well-known linkage is reflected in the model. We have worked hard to adjust for confounding variables but cannot be sure that all such effects are truly causal. We do know that the model does a good job of predicting or projecting later outcomes.

Three findings from the model stand out. First, it's clear that success is a cumulative process. According to our measures, a child who is ready for school at age 5 is almost twice as likely to be successful at the end of elementary school as one who is not.

This doesn't mean that a life course is set in stone this early, however.

Children who get off track at an early age frequently get back on track at a later age; it's just that their chances are not nearly as good. So this is a powerful argument for intervening early in life. But it is not an argument for giving up on older youth.

Second, the chances of clearing our last hurdle – being middle class by middle age (specifically, having an income of around $68,000 for a family of four by age 40) – vary quite significantly. A little over half of all children born in the 1980s and 1990s achieved this goal. But those who are black or born into low-income families were very much less likely than others to achieve this benchmark.

Third, the effect of a child's circumstances at birth is strong. We use a multidimensional measure here, including not just the family's income but also the mother's education, the marital status of the parents and the birth weight of the child. Together, these factors have substantial effects on a child's subsequent success. Maternal education seems especially important.

The Social Genome Model, then, is a useful tool for looking under the hood at why some children succeed and others don't. But it can also be used to assess the likely impact of a variety of interventions designed to improve upward mobility. For one illustrative simulation, we hand-picked a battery of programs shown to be effective at different life stages – a parenting program, a high-quality early-edcation program, a reading and socio-emotional learning program in elementary school, a comprehensive high school reform model – and assessed the possible impact for low-income children benefiting from each of them, or all of them.

No single program does very much to close the gap between children from lower- and higher-income families. But the combined effects of multiple programs – that is, from intervening early and often in a child's life – has a surprisingly big impact. The gap of almost 20 percentage points in the chances of low-income and high-income children reaching the middle class shrinks to six percentage points. In other words, we are able to close about two-thirds of the initial gap in the life chances of these two groups of children. The black-white gap narrows, too.

Looking at the cumulative impact on adult incomes over a working life (all appropriately discounted with time) and comparing these lifetime income benefits to the costs of the programs, we believe that such investments would pass a cost-benefit test from the perspective of society as a whole and even from the narrower prospective of the taxpayers who fund the programs.

What Now?

Understanding the processes that lie beneath the patterns of social mobility is critical. It is not enough to know how good the odds of escaping are for a child born into poverty. We want to know why. We can never eliminate the effects of family background on an individual's life chances. But the wide variation among countries and among cities in the U.S. suggests that we could do better – and that public policy may have an important role to play. Models like the Social Genome are intended to assist in that endeavor, in part by allowing policymakers to bench- test competing initiatives based on the statistical evidence.

America's presumed exceptionalism is rooted in part on a belief that class-based distinctions are less important than in Western Europe. From this perspective, it is distressing to learn that American children do not have exceptional opportunities to get ahead – and that the consequences of gaps in children's initial circumstances might embed themselves in the social fabric over time, leading to even less social mobility in the future.

But there is also some cause for optimism. Programs that compensate at least to some degree for disadvantages earlier in life really can close opportunity gaps and increase rates of social mobility. Moreover, by most any reasonable reckoning, the return on the public investment is high.

Editor's note: This piece originally appeared in the Milken Institute Review.

We can be sure that the 2016 presidential candidates, whoever they are, will be in favor of promoting opportunity and cutting poverty. The question is: how? In our contribution to a new volume published today, “Campaign 2016: Eight big issues the presidential candidates should address,” we show that people who clear three hurdles—graduating high school, working full-time, and delaying parenthood until they in a stable, two-parent family—are very much more likely to climb to middle class than fall into poverty:

But what specific policies would help people achieve these three benchmarks of success?  Our paper contains a number of ideas that candidates might want to adopt. Here are a few examples: 

1. To improve high school graduation rates, expand “Small Schools of Choice,” a program in New York City, which replaced large, existing schools with more numerous, smaller schools that had a theme or focus (like STEM or the arts). The program increased graduation rates by about 10 percentage points and also led to higher college enrollment with no increase in costs.

2. To support work, make the Child and Dependent Care Tax Credit (CDCTC) refundable and cap it at $100,000 in household income. Because the credit is currently non-refundable, low-income families receive little or no benefit, while those with incomes above $100,000 receive generous tax deductions. This proposal would make the program more equitable and facilitate low-income parents’ labor force participation, at no additional cost.

3. To strengthen families, make the most effective forms of birth control (IUDs and implants) more widely available at no cost to women, along with good counselling and a choice of all FDA-approved methods. Programs that have done this in selected cities and states have reduced unplanned pregnancies, saved money, and given women better ability to delay parenthood until they and their partners are ready to be parents. Delayed childbearing reduces poverty rates and leads to better prospects for the children in these families.

These are just a few examples of good ideas, based on the evidence, of what a candidate might want to propose and implement if elected. Additional ideas and analysis will be found in our longer paper on this topic.

As a rhetorical ideal, greater opportunity is hard to beat. Just about all candidates for high elected office declare their commitments to promoting opportunity – who, after all, could be against it? But opportunity is, to borrow a term from the philosopher and political theorist Isaiah Berlin, a "protean" word, with different meanings for different people at different times.

Typically, opportunity is closely entwined with an idea of upward mobility, especially between generations. The American Dream is couched in terms of a daughter or son of bartenders or farm workers becoming a lawyer, or perhaps even a U.S. senator. But even here, there are competing definitions of upward mobility.

It might mean being better off than your parents were at a similar age. This is what researchers call "absolute mobility," and largely relies on economic growth – the proverbial rising tide that raises most boats.

Or it could mean moving to a higher rung of the ladder within society, and so ending up in a better relative position than one's parents.

Scholars label this movement "relative mobility." And while there are many ways to think about status or standard of living – education, wealth, health, occupation – the most common yardstick is household income at or near middle age (which, somewhat depressingly, tends to be defined as 40).

As a basic principle, we ought to care about both kinds of mobility as proxies for opportunity. We want children to have the chance to do absolutely and relatively well in comparison to their parents.

On the One Hand…

So how are we doing? The good news is that economic standards of living have improved over time. Most children are therefore better off than their parents. Among children born in the 1970s and 1980s, 84 percent had higher incomes (even after adjusting for inflation) than their parents did at a similar age, according to a Pew study. Absolute upward income mobility, then, has been strong, and has helped children from every income class, especially those nearer the bottom of the ladder. More than 9 in 10 of those born into families in the bottom fifth of the income distribution have been upwardly mobile in this absolute sense.

There's a catch, though. Strong absolute mobility goes hand in hand with strong economic growth. So it is quite likely that these rates of generational progress will slow, since the potential growth rate of the economy has probably diminished. This risk is heightened by an increasingly unequal division of the proceeds of growth in recent years. Today's parents are certainly worried. Surveys show that they are far less certain than earlier cohorts that their children will be better off than they are.

If the story on absolute mobility may be about to turn for the worse, the picture for relative mobility is already pretty bad. The basic message here: pick your parents carefully. If you are born to parents in the poorest fifth of the income distribution, your chance of remaining stuck in that income group is around 35 to 40 percent. If you manage to be born into a higher-income family, the chances are similarly good that you will remain there in adulthood.

It would be wrong, however, to say that class positions are fixed. There is still a fair amount of fluidity or social mobility in America – just not as much as most people seem to believe or want. Relative mobility is especially sticky in the tails at the high and low end of the distribution. Mobility is also considerably lower for blacks than for whites, with blacks much less likely to escape from the bottom rungs of the ladder. Equally ominously, they are much more likely to fall down from the middle quintile.

Relative mobility rates in the United States are lower than the rhetoric about equal opportunity might suggest and lower than people believe. But are they getting worse? Current evidence suggests not. In fact, the trend line for relative mobility has been quite flat for the past few decades, according to work by Raj Chetty of Stanford and his co-researchers. It is simply not the case that the amount of intergenerational relative mobility has declined over time.

Whether this will remain the case as the generations of children exposed to growing income inequality mature is not yet clear, though. As one of us (Sawhill) has noted, when the rungs on the ladder of opportunity grow further apart, it becomes more difficult to climb the ladder. To the same point, in his latest book, Our Kids – The American Dream in Crisis, Robert Putnam of Harvard argues that the growing gaps not just in income but also in neighborhood conditions, family structure, parenting styles and educational opportunities will almost inevitably lead to less social mobility in the future. Indeed, these multiple disadvantages or advantages are increasingly clustered, making it harder for children growing up in disadvantaged circumstances to achieve the dream of becoming middle class.

The Geography of Opportunity

Another way to assess the amount of mobility in the United States is to compare it to that found in other high-income nations. Mobility rates are highest in Scandinavia and lowest in the United States, Britain and Italy, with Australia, Western Europe and Canada lying somewhere in between, according to analyses by Jo Blanden, of the University of Surrey and Miles Corak of the University of Ottawa. Interestingly, the most recent research suggests that the United States stands out most for its lack of downward mobility from the top. Or, to paraphrase Billie Holiday, God blesses the child that's got his own.

Any differences among countries, while notable, are more than matched by differences within Pioneering work (again by Raj Chetty and his colleagues) shows that some cities have much higher rates of upward mobility than others. From a mobility perspective, it is better to grow up in San Francisco, Seattle or Boston than in Atlanta, Baltimore or Detroit. Families that move to these high-mobility communities when their children are still relatively young enhance the chances that the children will have more education and higher incomes in early adulthood. Greater mobility can be found in places with better schools, fewer single parents, greater social capital, lower income inequality and less residential segregation. However, the extent to which these factors are causes rather than simply correlates of higher or lower mobility is not yet known. Scholarly efforts to establish why it is that some children move up the ladder and others don't are still in their infancy.

Models of Mobility

What is it about their families, their communities and their own characteristics that determine why they do or do not achieve some measure of success later in life?

To help get at this vital question, the Brookings Institution has created a life-cycle model of children's trajectories, using data from the National Longitudinal Survey of Youth on about 5,000 children from birth to age 40. (The resulting Social Genome Model is now a partnership among three institutions: Brookings, the Urban Institute and Child Trends). Our model tracks children's progress through multiple life stages with a corresponding set of success measures at the end of each. For example, children are considered successful at the end of elementary school if they have mastered basic reading and math skills and have acquired the behavioral or non-cognitive competencies that have been shown to predict later success. At the end of adolescence, success is measured by whether the young person has completed high school with a GPA average of 2.5 or better and has not been convicted of a crime or had a baby as a teenager.

These metrics capture common-sense intuition about what drives success. But they are also aligned with the empirical evidence on life trajectories. Educational achievement, for example, has a strong effect on later earnings and income, and this well-known linkage is reflected in the model. We have worked hard to adjust for confounding variables but cannot be sure that all such effects are truly causal. We do know that the model does a good job of predicting or projecting later outcomes.

Three findings from the model stand out. First, it's clear that success is a cumulative process. According to our measures, a child who is ready for school at age 5 is almost twice as likely to be successful at the end of elementary school as one who is not.

This doesn't mean that a life course is set in stone this early, however.

Children who get off track at an early age frequently get back on track at a later age; it's just that their chances are not nearly as good. So this is a powerful argument for intervening early in life. But it is not an argument for giving up on older youth.

Second, the chances of clearing our last hurdle – being middle class by middle age (specifically, having an income of around $68,000 for a family of four by age 40) – vary quite significantly. A little over half of all children born in the 1980s and 1990s achieved this goal. But those who are black or born into low-income families were very much less likely than others to achieve this benchmark.

Third, the effect of a child's circumstances at birth is strong. We use a multidimensional measure here, including not just the family's income but also the mother's education, the marital status of the parents and the birth weight of the child. Together, these factors have substantial effects on a child's subsequent success. Maternal education seems especially important.

The Social Genome Model, then, is a useful tool for looking under the hood at why some children succeed and others don't. But it can also be used to assess the likely impact of a variety of interventions designed to improve upward mobility. For one illustrative simulation, we hand-picked a battery of programs shown to be effective at different life stages – a parenting program, a high-quality early-edcation program, a reading and socio-emotional learning program in elementary school, a comprehensive high school reform model – and assessed the possible impact for low-income children benefiting from each of them, or all of them.

No single program does very much to close the gap between children from lower- and higher-income families. But the combined effects of multiple programs – that is, from intervening early and often in a child's life – has a surprisingly big impact. The gap of almost 20 percentage points in the chances of low-income and high-income children reaching the middle class shrinks to six percentage points. In other words, we are able to close about two-thirds of the initial gap in the life chances of these two groups of children. The black-white gap narrows, too.

Looking at the cumulative impact on adult incomes over a working life (all appropriately discounted with time) and comparing these lifetime income benefits to the costs of the programs, we believe that such investments would pass a cost-benefit test from the perspective of society as a whole and even from the narrower prospective of the taxpayers who fund the programs.

What Now?

Understanding the processes that lie beneath the patterns of social mobility is critical. It is not enough to know how good the odds of escaping are for a child born into poverty. We want to know why. We can never eliminate the effects of family background on an individual's life chances. But the wide variation among countries and among cities in the U.S. suggests that we could do better – and that public policy may have an important role to play. Models like the Social Genome are intended to assist in that endeavor, in part by allowing policymakers to bench- test competing initiatives based on the statistical evidence.

America's presumed exceptionalism is rooted in part on a belief that class-based distinctions are less important than in Western Europe. From this perspective, it is distressing to learn that American children do not have exceptional opportunities to get ahead – and that the consequences of gaps in children's initial circumstances might embed themselves in the social fabric over time, leading to even less social mobility in the future.

But there is also some cause for optimism. Programs that compensate at least to some degree for disadvantages earlier in life really can close opportunity gaps and increase rates of social mobility. Moreover, by most any reasonable reckoning, the return on the public investment is high.

Editor's note: This piece originally appeared in the Milken Institute Review.