In 2015 the international community agreed on a set of ambitious sustainable development goals (SDGs) for the global society, to be achieved by 2030. One of the lessons that the implementation of the Millennium Development Goals (MDG s) has highlighted is the importance of a systematic approach to identify and sequence development interventions—policies, programs, and projects—to achieve such goals at a meaningful scale. The Chinese approach to development, which consists of identifying a problem and long-term goal, testing alternative solutions, and then implementing those that are promising in a sustained manner, learning and adapting as one proceeds—Deng Xiaoping’s “crossing the river by feeling the stones”—is an approach that holds promise for successful achievement of the SDGs.

Having observed the Chinese way, then World Bank Group President James Wolfensohn in 2004, together with the Chinese government, convened a major international conference in Shanghai on scaling up successful development interventions, and in 2005 the World Bank Group (WBG ) published the results of the conference, including an assessment of the Chinese approach. (Moreno-Dodson 2005). Some ten years later, the WBG once again is addressing the question of how to support scaling up of successful development interventions, at a time when the challenge and opportunity of scaling up have become a widely recognized issue for many development institutions and experts.

Since traditional private and public service providers frequently do not reach the poorest people in developing countries, social enterprises can play an important role in providing key services to those at the “base of the pyramid.”

In parallel with the recognition that scaling up matters, the development community is now also focusing on social enterprises (SEs), a new set of actors falling between the traditionally recognized public and private sectors. We adopt here the World Bank’s definition of “social enterprises” as a social-mission-led organization that provides sustainable services to Base of the Pyramid (BoP) populations. This is broadly in line with other existing definitions for the sector and reflects the World Bank’s primary interest in social enterprises as a mechanism for supporting service delivery for the poor. Although social enterprises can adopt various organizational forms—business, nongovernmental organizations (NGOs), and community-based organizations are all forms commonly adopted by social enterprises—they differ from private providers principally by combining three features: operating with a social purpose, adhering to business principles, and aiming for financial sustainability. Since traditional private and public service providers frequently do not reach the poorest people in developing countries, social enterprises can play an important role in providing key services to those at the “base of the pyramid.” (Figure 1)

Figure 1. Role of SE sector in public service provision

Social enterprises often start at the initiative of a visionary entrepreneur who sees a significant social need, whether in education, health, sanitation, or microfinance, and who responds by developing an innovative way to address the perceived need, usually by setting up an NGO, or a for-profit enterprise. Social enterprises and their innovations generally start small. When successful, they face an important challenge: how to expand their operations and innovations to meet the social need at a larger scale. 

Development partner organizations—donors, for short—have recognized the contribution that social enterprises can make to find and implement innovative ways to meet the social service needs of people at the base of the pyramid, and they have started to explore how they can support social enterprises in responding to these needs at a meaningful scale. 

The purpose of this paper is to present a menu of approaches for addressing the challenge of scaling up social enterprise innovations, based on a review of the literature on scaling up and on social enterprises. The paper does not aim to offer specific recommendations for entrepreneurs or blueprints and guidelines for the development agencies. The range of settings, problems, and solutions is too wide to permit that. Rather, the paper provides an overview of ways to think about and approach the scaling up of social enterprise innovations. Where possible, the paper also refers to specific tools that can be helpful in implementing the proposed approaches. 

Note that we talk about scaling up social enterprise innovations, not about social enterprises. This is because it is the innovations and how they are scaled up that matter. An innovation may be scaled up by the social enterprise where it originated, by handoff to a public agency for implementation at a larger scale, or by other private enterprises, small or large. 

This paper is structured in three parts: Part I presents a general approach to scaling up development interventions. This helps establish basic definitions and concepts. Part II considers approaches for the scaling up of social enterprise innovations. Part III provides a summary of the main conclusions and lessons from experience. A postscript draws out implications for external aid donors. Examples from actual practice are used to exemplify the approaches and are summarized in Annex boxes.

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I attended a fascinating dinner earlier this week with Greek Foreign Minister Nikos Kotzias as part of his whirlwind visit to Washington DC. I shared with the minister some reflections on challenges facing him and the new Greek government at home in Greece and in Europe. When I served in Prague, I often urged the Europeans to take a page from our U.S. approach in 2009-10 and to avoid excessive austerity. I reiterated that view to the minister, and in particular pointed out the need for Germany to do more to help (see, for example, my colleague Ben Bernanke's recent post on the German current account surplus in his Brookings blog.) Paul Krugman hit the nail on the head with his recent column as well. On a personal note, when my father found himself trapped in Poland in 1939 is the Nazis invaded, he made his way to Greece, which gave him shelter until he was able to escape to the United States in 1940. So I was able to thank the Foreign Minister for that as well (somewhat belatedly, but all the more heartfelt for that). I was impressed with the Minister's grasp of the Greek financial crisis and the many other important issues confronting Europe.

Recently, Brookings has posted two articles commenting on proposals to raise the full retirement age for Social Security retirement benefits from 67 to 70. One revealed a fundamental misunderstanding of how the program actually works and what the effects of the policy change would be. The other proposes changes to the system that would subvert the fundamental purpose of the Social Security in the name of ‘reforming’ it.

A number of Republican presidential candidates and others have proposed raising the full retirement age. In a recent blog, Robert Shapiro, a Democrat, opposed this move, a position I applaud. But he did so based on alleged effects the proposal would in fact not have, and misunderstanding about how the program actually works. In another blog, Stuart Butler, a conservative, noted correctly that increasing the full benefit age would ‘bolster the system’s finances,’ but misunderstood this proposal’s effects. He proposed instead to end Social Security as a universal pension based on past earnings and to replace it with income-related welfare for the elderly and disabled (which he calls insurance).

Let’s start with the misunderstandings common to both authors and to many others. Each writes as if raising the ‘full retirement age’ from 67 to 70 would fall more heavily on those with comparatively low incomes and short life expectancies. In fact, raising the ‘full retirement age’ would cut Social Security Old-Age Insurance benefits by the same proportion for rich and poor alike, and for people whose life expectancies are long or short. To see why, one needs to understand how Social Security works and what ‘raising the full retirement age’ means.

People may claim Social Security retirement benefits starting at age 62. If they wait, they get larger benefits—about 6-8 percent more for each year they delay claiming up to age 70. Those who don’t claim their benefits until age 70 qualify for benefits -- 77 percent higher than those with the same earnings history who claim at age 62. The increments approximately compensate the average person for waiting, so that the lifetime value of benefits is independent of the age at which they claim. Mechanically, the computation pivots on the benefit payable at the ‘full retirement age,’ now age 66, but set to increase to age 67 under current law. Raising the full retirement age still more, from 67 to 70, would mean that people age 70 would get the same benefit payable under current law at age 67. That is a benefit cut of 24 percent. Because the annual percentage adjustment for waiting to claim would be unchanged, people who claim benefits at any age, down to age 62, would also receive benefits reduced by 24 percent.

In plain English, ‘raising the full benefit age from 67 to 70' is simply a 24 percent across-the-board cut in benefits for all new claimants, whatever their incomes and whatever their life-expectancies.

Thus, Robert Shapiro mistakenly writes that boosting the full-benefit age would ‘effectively nullify Social Security for millions of Americans’ with comparatively low life expectancies. It wouldn’t. Anyone who wanted to claim benefits at age 62 still could. Their benefits would be reduced. But so would benefits of people who retire at older ages.

Equally mistaken is Stuart Butler’s comment that increasing the full-benefit age from 67 to 70 would ‘cut total lifetime retirement benefits proportionately more for those on the bottom rungs of the income ladder.’ It wouldn’t. The cut would be proportionately the same for everyone, regardless of past earnings or life expectancy.

Both Shapiro and Butler, along with many others including my other colleagues Barry Bosworth and Gary Burtless, have noted correctly that life expectancies of high earners have risen considerably, while those of low earners have risen little or not at all. As a result, the lifetime value of Social Security Old-Age Insurance benefits has grown more for high- than for low-earners. That development has been at least partly offset by trends in Social Security Disability Insurance, which goes disproportionately to those with comparatively low earnings and life expectancies and which has been growing far faster than Old-Age Insurance, the largest component of Social Security.

But even if the lifetime value of all Social Security benefits has risen faster for high earners than for low earners, an across the board cut in benefits does nothing to offset that trend. In the name of lowering overall Social Security spending, it would cut benefits by the same proportion for those whose life expectancies have risen not at all because the life expectancy of others has risen. Such ‘evenhandeness’ calls to mind Anatole France’s comment that French law ‘in its majestic equality, ...forbids rich and poor alike to sleep under bridges, beg in streets, or steal loaves of bread.’

Faulty analyses, such as those of Shapiro and Butler, cannot conceal a genuine challenge to policy makers. Social Security does face a projected, long-term funding shortfall. Trends in life expectancies may well have made the system less progressive overall than it was in the past. What should be done?

For starters, one needs to recognize that for those in successive age cohorts who retire at any given age, rising life expectancy does not lower, but rather increases their need for Social Security retirement benefits because whatever personal savings they may have accumulated gets stretched more thinly to cover more retirement years.

For those who remain healthy, the best response to rising longevity may be to retire later. Later retirement means more time to save and fewer years to depend on savings. Here is where the wrong-headedness of Butler’s proposal, to phase down benefits for those with current incomes of $25,000 or more and eliminate them for those with incomes over $100,000, becomes apparent. The only source of income for full retirees is personal savings and, to an ever diminishing degree, employer-financed pensions. Converting Social Security from a program whose benefits are based on past earnings to one that is based on current income from savings would impose a tax-like penalty on such savings, just as would a direct tax on those savings. Conservatives and liberals alike should understand that taxing something is not the way to encourage it.

Still, working longer by definition lowers retirement income needs. That is why some analysts have proposed raising the age at which retirement benefits may first be claimed from age 62 to some later age. But this proposal, like across-the-board benefit cuts, falls alike on those who can work longer without undue hardship and on those in physically demanding jobs they can no longer perform, those whose abilities are reduced, and those who have low life expectancies. This group includes not only blue-collar workers, but also many white-collar employees, as indicated by a recent study of the Boston College Retirement Center. If entitlement to Social Security retirement benefits is delayed, it is incumbent on policymakers to link that change to other ‘backstop’ policies that protect those for whom continued work poses a serious burden. It is also incumbent on private employers to design ways to make workplaces friendlier to an aging workforce.

The challenge of adjusting Social Security in the face of unevenly distributed increases in longevity, growing income inequality, and the prospective shortfall in Social Security financing is real. The issues are difficult. But solutions are unlikely to emerge from confusion about the way Social Security operates and the actual effects of proposed changes to the program. And it will not be advanced by proposals that would bring to Social Security the failed Vietnam War strategy of destroying a village in order to save it.

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.