Improving data in the field of workforce development is a necessary step to evaluating programs and replicating success. What does current data tell us about the populations served? What outcomes should we measure to ensure programs are meeting America’s workforce development needs?

Earlier this month, we convened an expert group of policy makers, practitioners and scholars to address this problem, along with other challenges in workforce development. Previously, we interviewed Kate Blosveren Kreamer on the need to strengthen bridges from school to work. Next up in our Q&A series is Beth Weigensberg, a researcher at Mathematica Policy Research.

A: Although there is increasingly more rigorous research to assess effectiveness of programs, I feel a missing piece is understanding how to replicate and scale-up effective strategies. Often times workforce development programs that are deemed effective in one place do not always succeed when implemented in another. Research that evaluates effectiveness of programs should assess the role of contextual factors (including organizational, leadership, community, and political factors) to identify what is needed to successfully implement, replicate, and scale successful programs.

A: The workforce development field has an unfortunate history of “creaming”—programs selectively work with individuals most likely to succeed at finding employment, leaving those “harder-to-serve” individuals struggling to find assistance. Individuals that are often considered “hard-to-serve” include those who are homeless, disabled, formerly incarcerated, older workers, non-English speakers, low-income, and youth who are disconnected from school and employment. Increasing efforts to focus on these “harder-to-serve” populations include specialized targeted programs and strategies to help address the complex needs of these individuals, which often extend beyond skill development and finding a job. These specialized programs often provide additional support services to help address their complex needs, which can serve as additional barriers to obtaining and retaining employment.

A: Intermediate measures of engagement and skill development would provide interim measures of progress, while the ultimate objectives are obviously employment and educational attainment. Ongoing evaluation on interim measures allows for earlier acknowledgment of achievement and identification of those struggling to progress. Assessing outcomes in ways that control for different populations or barriers to employment, such as using risk-adjusted methodologies, can help us evaluate workforce development programs in an equitable manner.

One of the biggest challenges in the field is ensuring we have valid and reliable data to accurately estimate outcomes. The data available to assess outcomes are usually limited by what is collected in management information systems, which are often developed to be responsive to reporting requirements of publically-funded programs. But these siloed data do not allow for comprehensive assessment of workforce development outcomes within a state, locality, or even within a community-based employment and training organization that relies on numerous funding sources. Efforts are needed to integrate data and assess standardized outcome measures across program and funding silos to allow for more comprehensive assessment of outcomes within the field.

Researchers have long known that the rich live longer than the poor. Evidence now suggests that the life expectancy gap is increasing, at least here the United States, which raises troubling questions about the fairness of current efforts to protect Social Security.

There's nothing particularly mysterious about the life expectancy gap. People in ill health, who are at risk of dying relatively young, face limits on the kind and amount of work they can do. By contrast, the rich can afford to live in better and safer neighborhoods, can eat more nutritious diets and can obtain access to first-rate healthcare. People who have higher incomes, moreover, tend to have more schooling, which means they may also have better information about the benefits of exercise and good diet.

Although none of the above should come as a surprise, it's still disturbing that, just as income inequality is growing, so is life-span inequality. Over the last three decades, Americans with a high perch in the income distribution have enjoyed outsized gains.

Using two large-scale surveys, my Brookings colleagues and I calculated the average mid-career earnings of each interviewed family; then we estimated the statistical relationship between respondents' age at death and their incomes when they were in their 40s. We found a startling spreading out of mortality differences between older people at the top and bottom of the income distribution.

For example, we estimated that a woman who turned 50 in 1970 and whose mid-career income placed her in the bottom one-tenth of earners had a life expectancy of about 80.4. A woman born in the same year but with income in the top tenth of earners had a life expectancy of 84.1. The gap in life expectancy was about 3½ years. For women who reached age 50 two decades later, in 1990, we found no improvement at all in the life expectancy of low earners. Among women in the top tenth of earners, however, life expectancy rose 6.4 years, from 84.1 to 90.5. In those two decades, the gap in life expectancy between women in the bottom tenth and the top tenth of earners increased from a little over 3½ years to more than 10 years.

Our findings for men were similar. The gap in life expectancy between men in the bottom tenth and top tenth of the income distribution increased from 5 years to 12 years over the same two decades.

Rising longevity inequality has important implications for reforming Social Security. Currently, the program takes in too little money to pay for all benefits promised after 2030. A common proposal to eliminate the funding shortfall is to increase the full retirement age, currently 66. Increasing the age for full benefits by one year has the effect of lowering workers' monthly checks by 6% to 7.5%, depending on the age when a worker first claims a pension.

For affluent workers, any benefit cut will be partially offset by gains in life expectancy. Additional years of life after age 65 increase the number years these workers collect pensions. Workers at the bottom of the wage distribution, however, are not living much longer, so the percentage cut in their lifetime pensions will be about the same as the percentage reduction in their monthly benefit check.

Our results and other researchers' findings suggest that low-income workers have not shared in the improvements in life expectancy that have contributed to Social Security's funding problem.

It therefore seems unfair to preserve Social Security by cutting future benefits across the board. Any reform in the program to keep it affordable should make special provision to protect the benefits of low-wage workers.

Editor's note: This piece originally appeared in The Los Angeles Times. 

The past few months have seen a flurry of reports on discouraging trends in life expectancy among some of the nation’s struggling populations. Different researchers have emphasized different groups and have tracked longevity trends over different time spans, but all have documented conspicuous differences between trends among more advantaged Americans compared with those in worse circumstances.

In a study published in April, Stanford economist Raj Chetty and his coauthors documented a striking rise in mortality rate differences between rich and poor. From 2001 to 2014, Americans who had incomes in the top 5 percent of the income distribution saw their life expectancy climb about 3 years. During the same 14-year span, people in the bottom 5 percent of the income distribution saw virtually no improvement at all.

Using different sources of information about family income and mortality, my colleagues and I found similar trends in mortality when Americans were ranked by their Social-Security-covered earnings in the middle of their careers. Over the three decades covered by our data, we found sizeable differences between the life expectancy gains enjoyed by high- and low-income Americans. For 50-year old women in the top one-tenth of the income distribution, we found that women born in 1940 could expect to live almost 6.5 years longer than women in the same position in the income distribution who were born in 1920. For 50-year old women in the bottom one-tenth of the income distribution, we found no improvement at all in life expectancy. Longevity trends among low-income men were more encouraging: Men at the bottom saw a small improvement in their life expectancy. Still, the life-expectancy gap between low-income and high-income men increased just as fast as it did between low- and high-income women.

One reason these studies should interest voters and policymakers is that they shed light on the fairness of programs that protect Americans’ living standards in old age. The new studies as well as some earlier ones show that mortality trends have tilted the returns that rich and poor contributors to Social Security can expect to obtain from their payroll tax contributions.

If life expectancy were the same for rich and poor contributors, the lifetime benefits workers could expect to receive from their contributions would depend solely on the formula that determines a worker’s monthly pensions. Social Security’s monthly benefit formula has always been heavily tilted in favor of low-wage contributors. They receive monthly checks that are a high percentage of the monthly wages they earn during their careers. In contrast, workers who earn well above-average wages collect monthly pensions that are a much lower percentage of their average career earnings.

The latest research findings suggest that growing mortality differences between rich and poor are partly or fully offsetting the redistributive tilt in Social Security’s benefit formula. Even though poorer workers still receive monthly pension checks that are a high percentage of their average career earnings, they can expect to receive benefits for a shorter period after they claim pensions compared with workers who earn higher wages. Because the gap between the life spans of rich and poor workers is increasing, affluent workers now enjoy a bigger advantage in the number of months they collect Social Security retirement benefits. This fact alone is enough to justify headlines about the growing life expectancy gap between rich and poor

There is another reason to pay attention to the longevity trends. The past 35 years have provided ample evidence the income gap between America’s rich and poor has widened. To be sure, some of the most widely cited income series overstate the extent of widening and understate the improvement in income received by middle- and low-income families. Nonetheless, the most reliable statistics show that families at the top have enjoyed faster income gains than the gains enjoyed by families in the middle and at the bottom. Income disparities have gone up fastest among working-age people who depend on wages to pay their families’ bills. Retirees have been better protected against the income and wealth losses that have hurt the living standards of less educated workers. The recent finding that life expectancy among low-income Americans has failed to improve is a compelling reason to believe the trend toward wider inequality is having profound impacts on the distribution of well-being in addition to its direct effect on family income.

Over the past century, we have become accustomed to seeing successive generations live longer than the generations that preceded them. This is not true every year, of course, nor is it always clear why the improvements in life expectancy have occurred. Still, it is reasonable to think that long-run improvements in average life spans have been linked to improvements in our income. With more money, we can afford more costly medical care, healthier diets, and better public health. Even Americans at the bottom of the income ladder have participated in these gains, as public health measures and broader access to health insurance permit them to benefit from improvements in knowledge. For the past three decades, however, improvements in average life spans at the bottom of the income distribution have been negligible. This finding suggests it is not just income that has grown starkly more unequal.

Editor's note: This piece originally appeared in Real Clear Markets.

At the previous Summit of the Americas in Cartagena, Colombia in April 2012, President Barack Obama was badly roughed up by his Latin American counterparts (and embarrassed by his Secret Service for entertaining sex workers). Happily, the president and his entourage did much better at last week’s Summit in Panama, but the United States still has a way to go before the Summits once again become the productive vehicle for U.S. foreign policy that they once were, at their founding in Miami in 1994.

In Cartagena, leader after leader criticized the United States for allegedly heavy-handed counter-narcotics policies; oppressive treatment of immigrants; a weak response to crime and poverty in Central America; and monetary policies that supposedly harmed their economies. Most pointedly, speakers denounced the decades-old economic sanctions against Cuba. But given the upcoming Congressional elections, Obama and his Secretary of State Hillary Clinton did not want to do anything to endanger their Democratic Party’s chances. Obama was reduced to affirming, uncharacteristically, “I am here to listen, but our policies will not change.”

Once the November 2012 mid-term elections were over, policies did, in fact, change as the United States took a more relaxed approach to counternarcotics; the administration announced immigration policy reforms, including negotiating agreements with Central American nations to reduce the outflow of children and promote economic growth and jobs at home; and Vice President Joseph Biden met repeatedly with Central American leaders, and offered $1 billion in economic and security assistance.

In Cartagena, the Latin Americans threatened to boycott the Panama Summit if Cuba was not invited. But last December 17, President Obama and Cuban President Raúl Castro announced their agreement to negotiate the normalization of diplomatic relations, and in one blow, the United States transformed a thorn in relations with Latin America into a triumph of inter-American diplomacy that significantly enhanced U.S. prestige in the region.

So in Panama, most of the Latin American and Caribbean leaders, rather than berate the U.S. president, praised him for his courage and generally treated him with courtesy and respect. The three leaders of Central America’s Northern Tier (Guatemala, Honduras, and El Salvador—whose president is a former guerrilla commander) were effusive in their praise. The president of Brazil, Dilma Rousseff, who in Cartagena had sharply criticized U.S. monetary policies and had cancelled a visit to the White House to protest NSA spying, was pleased to announce that her visit had been rescheduled for this June. 

Obama’s own performance was more spirited than it had been in Cartagena. In response to a harsh polemic by Ecuadorean President Rafael Correa, Obama shot back: “The U.S. may be a handy excuse for diverting attention from domestic political problems, but it won’t solve those problems.” After listening politely through Raúl Castro’s extended remarks—during which Castro praised him as a man of honesty and authenticity—Obama departed to avoid having to sit through the predictable harangues of Argentine President Cristina Kirchner and Bolivian leader Evo Morales. Few could blame him.

At the parallel CEO Summit of business executives, Obama delivered thoughtful responses to questions posed by several entrepreneurs including Facebook founder Mark Zuckerberg, distinguishing himself from the facile rhetorical answers of the other presidents on the panel. At a Civil Society Forum where delegates affiliated with Cuban government organizations engaged in disruptive tactics, Obama lectured firmly on the virtues of civility and tolerance. Together with two other presidents (Tabaré Vasquez of Uruguay and Guillermo Solis of Costa Rica), Obama met privately with a dozen leaders of nongovernmental organizations, took notes, and incorporated at least one of their suggestions into his later public remarks.

But Obama’s Panama experience was marred by an inexplicable misstep by his White House aides a month earlier—the very public sanctioning of seven Venezuelan officials for alleged human rights violation and corruption, and the declaration that Venezuela was a “threat to U.S. national security.” To Latin American ears, that language recalled Cold War-era justifications for CIA plots and military coups. The State Department claims it warned the White House against Latin American blowback, but perhaps not forcefully enough. Once Latin American anger become apparent, the White House tried to walk the “national security” language back, saying it was just a formality required by U.S. legislation, but the damage was done. Speaker after speaker condemned the “unilateral sanctions” and called for their repeal.

The ill-timed sanctions announcement provided Venezuelan President Nicolás Maduro and his populist allies with a ready stick to beat the United States. For whileObama’s diplomacy had managed to peel off most of the Central Americans and win over or at least diminish the antagonism of other leaders, it had not found a way to tranquilize the rejectionist states (Ecuador, Bolivia, Nicaragua, Argentina) tied to Venezuela in an “anti-imperialist” alliance. Although a relatively small minority, these spoilers seriously disrupt plenary meetings with long and vituperative monologues, and small minorities of “veto” players can block the signing of otherwise consensus documents such that in Panama, as in Cartagena, no consensus declaration was issued; rather the host leader signed brief “mandates for action” that lacked full legitimacy.

The problem of the rejectionist minority will be partially alleviated when Kirchner is shortly replaced, likely by a more moderate government in Argentina, and political turnover will eventually come in Venezuela, but the hemisphere needs new rules that protect majority rights to get things done. Some simple procedural innovations, such as a more forceful chair, or even the simple system of red-yellow-green lights that alert speakers to their time limits, would help.

Notwithstanding the misstep on Venezuela sanctions and the disruptive tactics of the rejectionist minority, the overall mood in Panama was upbeat, even celebratory. Leaders made reference to the xenophobic violence and religious intolerance plaguing other continents, and remarked with some pride that, in comparison, Latin America was a zone of peace that was also making progress, however inadequate, on human rights, poverty alleviation, and clean energy. With some procedural fixes, favorable political winds, and continued progress on concrete issues of mutual interest, inter-American relations could well continue their upward trajectory.

Read more about the Summit with Richard Feinberg's post on Cuba's multi-level strategy at the Seventh Summit of the Americas.

Editor’s Note: The following chapter is part of the report, "After the Drug Wars," published in February 2016 by the London School of Economics and Political Science's Expert Group on the Economics of Drug Policy.

Even as the administration of Mexico’s President Enrique Peña Nieto has scored important reform successes in the economic sphere, its security and law enforcement policy toward organized crime remains incomplete and ill-defined. Despite the early commitments of his administration to focus on reducing drug violence, combating corruption, and redesigning counternarcotics policies, little significant progress has been achieved. Major human rights violations related to the drug violence, whether perpetrated by organized crime groups or military and police forces, persist – such as at Iguala, Guerrero, where 43 students were abducted by a cabal of local government officials, police forces and organized crime groups. This has also been seen in Tatlaya and Tanhuato, Michoacán, where military forces have likely been engaged in extrajudicial killings of tens of people. Meanwhile, although drug violence has abated in the north of the country, such as in Ciudad Juárez, Monterrey and Tijuana, government policies have played only a minor role. Much of the violence reduction is the result of the vulnerable and unsatisfactory narcopeace – the victory of the Sinaloa or Gulf Cartels. 

The July 2015 spectacular escape of the leader of the Sinaloa Cartel and the world’s most notorious drug trafficker – Joaquín Guzmán Loera, known as El Chapo – from a Mexican high-security prison was a massive embarrassment for the Peña Nieto government. Yet it serves as another reminder of the deep structural deficiencies of Mexico’s law enforcement and rule-of law system which persists more than a decade after Mexico declared its war on the drug cartels.

The Peña Nieto administration often pointed to the February 2014 capture of El Chapo as the symbol of its effectiveness in fighting drug cartels and violent criminal groups in Mexico. The Peña Nieto administration’s highlighting of Chapo’s capture was both ironic and revealing: ironic, because the new government came into office criticizing the anti-crime policy of the previous administration of Felipe Calderón of killing or capturing top capos to decapitate their cartels; and revealing, because despite the limitations and outright counterproductive effects of this high-value-targeting policy and despite promises of a very different strategy, the Peña Nieto administration fell back into relying on the pre-existing approach. In fact, such high-value-targeting has been at the core of Pena Nieto’s anti-crime policy. Moreover, Chapo’s escape from Mexico’s most secure prison through a sophisticated tunnel (a method he had also pioneered for smuggling drugs and previously used for escapes) showed the laxity and perhaps complicity at the prison, and again spotlighted the continuing inadequate state of Mexico’s corrections system.

Read the full chapter here.

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During his address at the U.S. Coast Guard Academy graduation this week, President Obama highlighted climate change as “a serious threat to global security, an immediate risk to (U.S.) national security.” Is President Obama right? Are the national security threats from climate change real?

When I listen to the “know-nothing” crowd and their front men in Congress who actively ignore ever-stronger scientific evidence about the pace of climate change, I want to quit my day job and organize civic action to close them down. The celebration of anti-knowledge, the denial of science, the treatment of advanced education as a mark of ignominy rather than the building block of American innovation and citizenship—these are as grave a threat to America’s future as any I can identify. So I’m sympathetic to the Obama administration’s desire to take a bludgeon to climate deniers. But is “national security” the right stick to move the naysayers forward? 

The Danger of Overstating for Effect

The White House’s report on the national security implications of climate change is actually pretty measured and largely avoids waving red flags, but it overstates for effect, as do the President’s remarks to the Coast Guard Academy. 

The report gets right the notion that climate change will hit hardest where governance is weakest and that this will exacerbate the challenge of weak states; but it’s a pre-existing challenge and almost all weak states are already embroiled in forms of internal war—climate change may exacerbate this problem, but it certainly won’t create it. The White House report also asserts a link to terrorist havens, and of course there are risks here—but it’s far from a 1:1 relationship, and there’s little evidence that the countries where climate will hit governance worst are the places where the terrorism problem is most serious. 

The report also highlights the Arctic as a region most dramatically effected by climate change, and that is true—but so far what we’re seeing in the Arctic is that receding ice is triggering commercial competition and governance cooperation; not conflict. The security challenge from the Arctic is modest: the climate challenge of melting ice caps and potential release of trapped greenhouse gases is potential very serious indeed. 

Then there are the domestic effects. The report highlights that the armed services may be drawn in more to dealing with coastal flooding and similar crises, and that’s a fair point—though it’s a National Guard point more than its an armed forces point. That is to say, it’s about the question of whether we have enough domestic disaster response capacity: an important question, not obviously a national security question. And it oddly passes over what’s likely to be the most important consequence of climate change in the United States, namely declining agricultural productivity in the American heartland. America’s farmers, not just its coastal cities, are in the front lines here. 

All of these are real issues and the U.S. government will have to plan for lots of them, including in the armed services; all fair. But is national security really the right way to frame this? Is linking it directly to the capacities needed for America’s armed services the right way to mobilize support for more serious action on climate change? 

Of course the term “security” has been evolving, and has long since extended beyond the limited purview of nuclear risks and great power conflict. Civil wars and weak governance and rising sea leaves are certainly a security issue to somebody, and we’re sure to be involved—whether it’s in dealing with refugee flows, or more acute crises where severe impacts overlay on pre-existing tensions. These are global security issues for someone, to be sure; I’m not sure they are “immediate risks to our national security.

Words Matter

Why does the rhetoric matter? Am I glad that we have a President who cares about climate change? Yes. Do I want the Obama administration to be focusing on mobilizing the American public on this? Yes. So why does it bother me if they use a national security lens? A national security framework implicitly does several things: it invokes a sense of direct threat, which I think distorts the nature of the challenge; it puts military responses front forward, which is the wrong emphasis; and although the report doesn’t get into this question, if the President highlights the immediate national security risk from climate, it displaces other security threats that we confront and truly require U.S. strategic planning, preparedness, and resources. None of this is totally wrong, but surely there are other ways to mobilize the American public to an erosion of our natural and agricultural environment than to invoke the security frame? 

Every piece of evidence I’ve seen about the state of temperature change; the real pathway we are on in terms of carbon-based fuels consumption (despite optimistic pledges in the lead up to the Paris climate conference); realistic projections of growth in renewable energies; and demand growth in the developing world (especially India) tells me that we’re rapidly blowing past the two degree target for limiting the rise in average global temperatures, and we’re well on our way to a four degree shift. 

We need urgently to pivot our scientific establishment away from the now well-trod field of predicting temperature shift to getting a much more granular understanding about the ways in which changing temperature will affect water sources, agricultural productivity, biodiversity, and dramatic weather events. And we need to treat those who willfully deny science—in climate and other areas—as a serious threat to our nation’s  future. I’m just not convinced that national security is the right or best way to frame the arguments and mobilize the America public’s will around this critically important issue.

Donald Trump has made waves during this year’s election cycle by taking a hard line on illegal immigration. This, however, builds on years of heated debate among policymakers. It is also an enduring hot-button issue in Arizona, which has passed several immigration laws over the years.  In 2010, the passage of SB 1070 brought national attention to this debate.  Deemed the strictest immigration law to date, SB 1070 sought to achieve “attrition [of illegal immigrants] through enforcement” by requiring law enforcement to detain any person whom they believed to be residing in the country illegally. Although SB 1070’s effects on individuals and families have been well documented, little is known about its impact on students and schools. To this end, we sought to estimate the relationship between the passage of SB 1070 and school-level student achievement.

We anticipated that anti-immigration policies would primarily affect children from the families of undocumented immigrants. Such effects could be observed in different ways. For instance, the emotional and psychological distress of these children could result in a decline in average test scores at the school-level. On the other hand, students might have left the country or the state under the threat of being deported in which case school-level test scores would rise (since these students often perform below their peers). To this end, we considered three scenarios: 

1. Immigrant children remain in the state but experience higher levels of stress.  As a result, average school-level test scores will drop while Hispanic enrollment remains the same.
2. Children of undocumented immigrants leave the state, which results in a drop in Hispanic enrollment accompanied by an increase in school-level test scores.
3. Or, the first two scenarios occur simultaneously and we do not observe any change in test scores since the two effects would cancel each other, but note a slight decrease in Hispanic enrollment.

In order to see which of these hypothetical scenarios is supported by the data, we first estimated the relationship between the passage of SB 1070 and average school-level reading test scores. We then attempted to unpack the mechanism through which such an effect might have taken place. To this end, we used publicly available data on school-level achievement and enrollment collected by the Arizona Department of Education (ADE). Given the targeted nature of the policy and the demographics of immigrants in Arizona, the majority of whom are of Hispanic or Mexican descent, we focused on schools that traditionally enroll large proportions of Hispanic students. We identified schools with high (more than 75 percent) shares of Hispanic students as those whose average achievement and student composition are most likely to be affected by immigration reform. We contrasted changes in school-level achievement and enrollment in those schools with schools that enroll less than 25 percent Hispanic students, as these schools are less likely to experience any changes as a result of tightening immigration laws.

Figures 1 and 2 show trends in the average percentage of students passing the state reading test and average Hispanic enrollment at these schools between 2006-2007 and 2011-2012.           

Figure 1. Average Percent of Students Passing AIMS Reading

Figure 2. Average Hispanic Student Enrollment

Clearly, the rate of growth in school-level reading scores was much higher for high Hispanic schools after the passage of SB 1070 in 2010 (Figure 1). At the same time, there was a significant decrease in Hispanic enrollment in these schools (Figure 2). Thus, it appears the second scenario is likely driving the patterns we observe.

The data also suggest that the trends for high Hispanic and low Hispanic schools started diverging before the passage of SB 1070 - after the 2007-2008 school year.  This happens to be the year that Arizona passed an even more restrictive, though less controversial, immigration law – the Legal Arizona Workers Act (LAWA). LAWA required Arizona business owners to verify the legal status of their employees using E-Verify, an online tool managed by the federal government. Although LAWA used a different mechanism, similar to SB 1070 it sought to achieve the attrition of undocumented immigrants from the state. 

We then would anticipate both laws to have similar effects on school-level achievement and Hispanic enrollment. Indeed, we estimated that LAWA likely led to an average increase of roughly 4 percent of students passing the state reading test at high Hispanic schools. This was accompanied by an average loss of 38 Hispanic students per school. Because the passage of SB 1070 was preceded by the passage LAWA as well as a language policy that would have affected treatment schools, disentangling the effects of these two policies is not straightforward. However, based on our analysis, we estimate that SB 1070 is associated with an average increase of between 1.5 percent and 4.5 percent of students passing the state reading test at the school-level accompanied by an average loss of between 14 and 40 Hispanic students. 

Despite the fact that we cannot pin down the exact magnitude of SB 1070’s effect on school-level achievement, our analysis shows that when Arizona passed restrictive immigration laws in 2008 and 2010, it looked as if the state’s lowest performing schools were improving rapidly. This, however, likely had more to do with the changing composition of schools as an indirect though anticipated effect of immigration policies than with policies aimed at improving student achievement. 

Despite this, the Arizona Department of Education took credit for these gains. Similarly, Arizona was recently recognized as one of the nation’s leaders in growth on the National Assessment of Educational Progress (NAEP) over the last ten years. Although wrongly attributing these gains may seem harmless at first glance, it is important to remember that Arizona is viewed by many as a model for controversial education reforms like school choice and high-stakes accountability. It is easy to imagine how policymakers might look at increasing test scores in Arizona and wrongly attribute them to these kinds of reforms. That’s not to say that these policies don’t have merit. However, if other states adopt education policy reforms under the assumption that they worked in Arizona, then they might find that these policies fail to deliver.

In the developing world, more than 200 million children under the age of five years are at risk of not reaching their full development potential because they suffer from the negative consequences of poverty, nutritional deficiencies and inadequate learning opportunities. Overall, 165 million children (one in four) are stunted, and 90 percent of these children live in Africa and Asia. And though some progress has been made globally, child malnutrition remains a serious public health problem with enormous human and economic costs. Worldwide, only about 50 percent of children are enrolled in preprimary education, and in low-income countries a mere 17 percent. And though more and more children are going to school, millions have little to show for it. By some accounts, 250 million children of primary school age cannot read even part of a sentence. Some of these children have never been to school (58 million); but more often, they perform poorly despite having spent several years in school, which reflects not only the poor quality of many schools but also the multiple disadvantages that characterize their early life.

Ensuring that all children—regardless of their place of birth and parental income or education level—have access to opportunities that will allow them to reach their full potential requires investing early in their development. To develop their cognitive, linguistic, socioemotional and physical skills and abilities, children need good nutrition and health, opportunities for play, nurture and learning with caregivers, early stimulation and protection from violence and neglect.

The Case for Early Interventions 

The arguments for investing in children early are simple and convincing. Early investment makes sense scientifically. The brain is almost fully developed by age three, providing a prime opportunity to achieve high gains. We know that the rapid rate of development of the brain’s neural pathways is responsible for an individual’s cognitive, social and emotional development, and there is solid evidence that nutrition and stimulation during the first 1,000 days of life are linked to brain development. 

Early investment makes sense in terms of equity. The playing field has the highest chances of being leveled early on, and we know that programs have a higher impact for young children from poorer families. In the United States, for example, increasing preschool enrollment to 100 percent for low-income children would reduce disparities in school readiness by 24 percent between black and white children and by 35 percent between Hispanic and white children. We also know that equalizing initial endowments through early childhood development (ECD) programs is far more cost-effective than compensating for differences in outcomes later in life. 

Early investment makes sense economically. Investing early prevents higher costs down the road, and interventions yield a high return on investment. There is evidence of the benefits for the individual and for society more broadly. For instance, at the level of the individual, in Jamaica children participating in an early childhood stimulation program were found to have 25 percent higher earnings 20 years later compared with children who did not participate. At the economy-wide level, eliminating malnutrition is estimated to increase gross domestic product by 1 to 2 percentage points annually, while countries with school systems that have a 10-percentage-point advantage in the proportion of students

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