THE ASSOCIATED PRESS/STEPHAN SAVOIAThe Middle Class Is Key
to a Better-Educated Nation
A Stronger Middle Class Is Associatedwith Better Educational OutcomesDavid Madland and Nick Bunker

November 2011

W W W.AMERICANPROGRESSAC TION.ORG

The Middle Class Is Key
to a Better-Educated Nation
A Stronger Middle Class Is Associatedwith Better Educational OutcomesDavid Madland and Nick Bunker

November 2011

Contents

1

Introduction and summary

4

The academic research
46Linking a strong middle class to better education

Why a strong middle class boosts achievement
6

School-funding connections

7

Nonschool-funding connections

9

Results

11

Conclusion

12

Appendix
12

Data

13

Models17

About the authors

18

Endnotes

Introduction and summary
Education is key to America’s economic success as technological change andglobal competition increase exponentially. Unfortunately, where once our nation
was atop the world academically, today American students rank in the middle ofthe pack. Fifteen countries now have higher college graduation rates than us, andour average test scores are lower than those of not just peer countries but also lesswealthy places such as Slovenia and Poland.1
Not surprisingly, business leaders and the American public are concerned about
the quality of American education.2 There are myriad proposals about how to
improve the U.S. education system. Yet a critical but often overlooked reason forour poor educational achievement is the decline of the American middle classover the past four decades.
America today is less of a middle-class society as the wealthy capture most of theeconomy’s gains. The top 1 percent’s share of income reached 23.5 percent in
2007, the last year before the Great Recession, up from 9.12 percent in 1974. Over
this same time period, the share of income going to the middle class, defined as
the middle 60 percent of the population, fell to 46.9 percent from 52.2 percent,and the share of income going to the bottom 20 percent stayed at roughly 3 percent, declining by less than 1 percentage point.3
When poor and lower-income Americans can’t work their way into the middle
class, and when the middle class sees its share of income shrinking, that harms ournation’s educational achievement in several ways. Societies with a strong middle
class make greater investments in education—as described in detail and quantified in our companion report, “Middle Class Societies Invest More in Public
Education”—and all else being equal, higher levels of spending tend to boost
educational performance.4
At the family level, people living in strong middle-class societies are more likely to
get involved in making their children’s schools better, pushing to raise educational

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

standards, and putting pressure on school administrators to fire or transfer badteachers.5 And some of the culture and behaviors that middle-class parents pass onto their children about education, such as valuing school achievement and attending school, are thought to come from their middle position in society with a levelof income and security that makes them neither rich nor poor.6 All of this helps
boost educational achievement. What’s more, in more middle-class societies,
citizens—rich, poor, and middle class alike—tend to be healthier and healthier
students do better academically.7
Finally, expectations for educational performance can have a significant impact on
educational outcomes. Societies sometimes have lower expectations for those at
the bottom of the economic spectrum—an effect that may be more pronounced
in societies with a weaker middle class.8 In contrast, societies that expect everyone
to excel in school if given the opportunity boast more students doing better andgoing onto college.9
To quantify the impact of the middle class on educational achievement, we examined math scores in all 50 states between 2003, the first year data on all states areavailable, and 2009, the most recent year complete data are available. We foundthat a weaker middle class is associated with significantly lower levels of math performance. Our results held even when controlling for a host of other factors that
affect outcomes, such as the state’s income level, childhood poverty rates, and thepercentage of students who are English language learners.
Our results indicate that a stronger middle class is associated with higher testscores, separate and above any effects of poverty, overall income levels, and thepercentage of non-English speakers. In short, the “middle-classness” of a state
directly influences its educational achievement.

In more middleclass societies,
citizens—rich,poor, and middle
class alike—tend
to be healthierand healthier
students do better
academically.

Specifically, we found that each percentage point increase in the share of income
going to the middle class is associated with an increase of 0.69 points on the
National Assessment of Educational Progress composite scale for math.
Our study suggests that if the middle class received the same share of income as it
did in the 1960s—approximately 7 percentage points more—then the median state,
which had a math score of 284 in 2009, would have a score 4.83 points higher today.
If just a single state—for example, Florida, which currently ranks 16th from the bottom on standardized tests—boosted its middle-class income share by 7 percentage

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

points, the results suggest that its scores would rise to the level of the states with themedian score—Delaware, Iowa, and North Carolina in 2009.
To put this in context, a $20,000 increase in a state’s gross domestic product percapita—the commonly used measure of a state’s income level—results in about aneight-point increase in math scores. Such an increase in per capita GDP would be
about the same increase the United States experienced between 1967 and 2009.
In the pages that follow, we will present the array of academic research on this
topic that supports the premise of our paper, and then detail the school andnonschool functions that a strong middle class supports in our education systemand our society. We turn next in the paper to the specific results of our analysis,
which find that a stronger American middle class is associated with higher levelsof academic achievement.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

The academic research
Linking a strong middle class to better education
A significant body of academic research finds that countries with lower levels of
economic inequality do better academically than countries with greater levels of
economic inequality.10 This research tends to examine reading, math, or science
scores on standardized tests, finding that on average students in more equal countries have higher test scores.
Importantly, this research finds that a more equal income distribution boosts theperformance of all students, not just those at the bottom. The poor may benefit
most from being in a more egalitarian society, but those at the top also benefit.
Dennis Condron, an Emory University sociologist, finds that more economicallyequal countries actually have higher percentages of very highly skilled students
than do less egalitarian countries.11 Similarly, Richard Wilkinson, a University of
Nottingham professor, and Kate Pickett of the University of York argue in The
Spirit Level that lower levels of economic inequality increase academic performance, even for students with high socioeconomic status.12
The literature linking inequality and academic performance generally controls
for a country’s income level as well as for a host of other factors that also influence test scores. Some of these studies also control for the poverty level in acountry.13 By controlling for total income and poverty levels, as well as otherfactors, the academic literature on country-level educational achievement makesa compelling case that the relative distribution of income in a society affects
educational performance.
Research at the student and school level has also come to similar conclusions,finding that middle-class students and schools tend to have, for example, higher
test scores, lower dropout rates, and better academic and career achievements inthe future.14 Many of these studies also control for income and poverty levels.
In short, the empirical literature strongly suggests that the “middle-classness” of asociety affects educational outcomes, though the research does not often directly
examine the impact of the middle class, instead focusing on other measures ofinequality. Similarly, many of the theoretical arguments made by researchers about

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nationunequal societies are also likely to be relevant to the effects on the middle class,though they are not always made directly about the middle class.
This is especially true because over the past few decades in the United States andother advanced countries, changes in inequality are largely about the rich pullingaway from not just the poor but also (and especially) the middle class. The middle
class and the poor both experienced relative income decreases that are significant
compared to the top, but the decline in the relative share of income going to the
middle class is especially stark.
In the United States from 1979 to 2007, as the share of national income goingto the top 1 percent increased by more than 14 percentage points, the share ofincome going to the middle 60 percent declined by 4.7 percentage points, compared to a decline of just 0.7 percentage points for the bottom 20 percent.15 The
same trend is also apparent internationally. The share of income going to therich rose dramatically in a number of developed countries, including the United
Kingdom, Australia, and Canada, largely at the expense of their middle class.16
In short, the trends driving inequality are largely because of runaway incomes at thetop, which distanced the rich from the rest of society and weakened the middle class.
This study builds on existing research to argue that a strong middle class boosts
educational achievement in U.S. states. We are aware of only one other study thatexamines state-level inequality and its effect on educational achievement. This study
finds that inequality reduces test scores, though the analysis does not control forother factors that are commonly found to impact test scores, such as income.17
Because the economic literature on this topic finds income distribution effects
academic achievement at the country, school, and individual levels, we have strong
expectations that a stronger middle class is very likely to also boost educational
performance in U.S. states.18

5Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Why a strong middle classboosts achievement
The reasons why middle-class societies have better educational outcomes tend to
fall into two broad categories: school-funding explanations and nonschool-funding explanations. Researchers sometimes emphasize one account over the otherbut generally find that both are at play. Let’s look at each in turn.

School-funding connections
Countries and states with strong middle classes tend to spend more on education
and, all else being equal, higher levels of spending tend to lead to higher levels ofachievement.19 As described at length in our companion report, “Middle Class
Societies Invest More in Public Education,” middle-class societies invest more in
public goods such as education because the economic future of the middle classis more closely tied to the quality of public education than is the economic futureof the rich. And a strong middle class boasts the political power to push for their
desired level of funding. Furthermore, middle-class societies are more trusting ofpeople they don’t know—and trust increases all people’s support for spending on
public education that they may not directly benefit from.
To be sure, there is much room to improve the efficiency of current levels of
education spending.20 But all else being equal, higher levels of spending lead to
improved outcomes.21
Importantly, there is good reason to expect that increased spending from a stronger middle class would be spent in ways that boost achievement. Middle-classsocieties tend to spend government money more efficiently than unequal societies, with less waste, fraud, and abuse.22 And researchers also find that more equalcountries spend their education resources more equitably, ensuring most students
have sufficient resources, not just the privileged.23

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Nonschool-funding connections
There are numerous nonschool-funding explanations for why middle-class societies have higher levels of academic achievement. The reasons range from moreengaged parents to increased levels of public health to higher expectations.
Consider first, the efforts of middle-class parents in pushing for higher academic
standards and putting pressure on administrators to fire or transfer bad teachers
boosts educational achievement.24
Because paying for private school imposes a much greater, and sometimes impossible, hardship on middle-class families than it does on the wealthy, the middle
class has an especially strong incentive to invest their time and energy to makepublic schools work. In addition, in more equal societies, people are more likely tothink their actions can make a difference and thus are more likely to participate inpolitical activities such as volunteering to improve a school.25
As a result, people living in middle-class societies are more likely to get involved
to make their children’s schools better, while people living in unequal societies are
more likely to remain on the sidelines. As America became less of a middle-classsociety, political participation significantly decreased.26 Indeed, membership in
Parent Teacher Associations, a predominantly middle-class organization, declined
dramatically as the middle class declined in the United States.27
Then there’s the question of time. As incomes for the rich rise rapidly and wages
stagnate for the middle class, many middle-class Americans have had to significantly increase their hours of work—in large part by women moving into the paid
workforce—which reduces the time and energy Americans have for volunteering
to improve their children’s schools.28

In more equal
societies, people
are more likely
to think theiractions can makea difference andthus volunteer toimprove a school.

More equal societies also tend to be healthier. The rich, poor, and middle class all
tend to be healthier in more middle-class societies.29 In contrast, inequality canharm public health in several ways, specifically by:r Reducing investment in public health efforts30r Undermining social cohesion and networks31r Causing frustration and work stress that leads to reduced health32
This is a major problem because healthier students score better on standardized tests.
Research by Phillip B. Levine and Diane Schanzenbach, economists at Wellesley

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

College and Northwestern University respectively, find that children who arehealthier score higher on the National Assessment of Educational Progress tests.33
Cultural expectations may also be
defined by the size of a nation’s
middle class. Societies sometimes
have lower educational expectations for those at the bottom of
the economic spectrum.34 And
society’s expectations for educational performance can havea significant impact on achievement.35 As the rich pulled awayfrom the poor and especially the
middle class over the past several
decades, the social distances are
now greater, which could makeelite expectations especially low
for the poor and middle class.36

FIGURE 1

States with stronger middle classes have better education outcomes
Scores on standardized tests are correlated with the share of income
going to the middle class
NAEP math scores
300

MA
MN

290
NJ
CT
TX
280 NY

NCOR

SD
PA CO
MD

IL
FL

270

LA

MS

AL

KS
VA
OH
ID NEINME

DE
MO SC

ND
MT
NH
WI
WA
WY
IA
UT

AK

MI

KY
AZ
AR TN

OK

VT

RI
WV

CA

GA
NV

HI

NM

Finally, some of the culture and260
behaviors that middle-class
.44
.46
.48
.50
parents pass on to their children
Middle-class share of state income
about education are thought tocome from the unique economic
Sources: Data are the averages of the data for 2009,2007, 2005 and 2003.
position of the middle class. Unlike the rich, the middle class has more of an ecoThe math scores are the composite score index
for 8th grade students and are from the National
nomic need to work for a living and thus values education for its potential economic
Assessment of Education Progress.
returns. Yet unlike the poor, the middle class has greater economic resources to delay The middle class share is the share of income goingto the middle 60 percent of the income distribution
and the data are from the Current Population Survey
gratification and make investments in human capital.37 These middle-class values
and the American Community Survey.
and behaviors, such as valuing school achievement and attending school, promote
educational achievement.38 In especially unequal societies, people on the bottom
end may be more likely to reject these values and develop an oppositional culture orlose their sense of control over their destiny if they don’t see a clear path to success.39
In sum, there are a number of ways in which a strong middle class might be
expected to increase educational outcomes. Figure 1 demonstrates how thisdynamic plays out in a state-by-state evaluation of a strong middle class and better
educational outcomes.
We turn now to an analysis of the data that underpins this chart.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Results
To examine the relationship between the middle class and educational achievement, we analyze state standardized math test scores for eighth-grade students inall 50 states from 2003 to 2009, the first year data are available on all states to themost recent year complete data are available. We control for a range of variables
that have been found to affect educational achievement, including state income
levels, state childhood poverty rates, and the share of students who are English
language learners. By controlling for state wealth and poverty, as well as other factors, we attempt to measure the effect of the “middle-classness” of a state.
We find a strong and statistically significant relationship between the strength ofthe middle class and math scores. Additional details on our analysis are available
in the appendix. Our results are similar even when using different econometrictechniques, indicating that our results are quite robust.
In our main model, we find that a 1 percentage point increase in the share ofincome received by the middle class is associated with an increase of 0.69 points
on the National Assessment of Educational Progress composite scale for math.
The median score on the math test in 2009 was 284. The relationship is statistically significant at beyond the 5 percent level, meaning the results are unlikely tooccur by chance. (More detailed analysis of the data is in the appendix.)
Our study suggests that if the middle class received the same share of income as
it did in the 1960s—approximately 7 percentage points more—then the score
for math would be 4.83 points higher. If just a single state—for example, Florida,
which currently ranks 16th from the bottom on standardized tests—boosted
its middle-class income share by 7 percentage points, the results suggest thatits scores would rise to the level of the states with the median score—currently
Delaware, Iowa, and North Carolina. To put this in context, a $20,000 increase ina state’s gross domestic product per capita—a commonly used measure of a state’s
income level—results in about an eight-point increase in math scores. Such anincrease in per capita GDP would be about the same increase in the United States
experienced between 1967 and 2009.
For our other control variables, results are consistent with other studies and are
as expected: We find that both the percent of students who are English language
learners and childhood poverty rates are associated with lower test scores.

9Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

As a further test of the importance of a strong middle class on educational
achievement, we also run a model that controls for education spending. In thisway, we are able to test whether the middle class affects educational outcomesthrough channels outside of increased spending. Our main model accounts for all
the ways that the middle class improves outcomes, while our second model shows
how the factors outside of spending affect outcomes. In both cases, the strength ofthe middle class is strongly correlated with educational outcomes.
Specifically, when we control for state educational spending as well as for state
income and poverty levels and the share of students who are English language
learners, we find that a 1 percentage point increase in the share of income received
by the middle class is associated with an increase of 0.55 points on the math scale.
This result is significant at the 5 percent level, again indicating that the results
are unlikely to occur by chance. This suggests that a stronger middle class boosts
achievement through both school-funding and nonschool-funding mechanisms.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Conclusion
Our study uses data from all 50 states and finds that a stronger middle class is
associated with concrete improvements in educational outcomes. A stronger
middle class is likely to lead to better educational outcomes by not only increasing levels of spending but also through other means including healthier societies,
more involvement with the educational system, and strengthening middle-classvalues. Improving America’s educational system is no easy task but strengthening
the middle class is likely an important part of that task.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Appendix

Data
Our dependent variable, and our measure of educational attainment, is thecomposite National Assessment of Educational Progress math scale for eighthgrade students. We also ran our models using data for fourth-grade students andfound similar results.40
The scale is a composite index that measures a student’s ability across several areas
within the subject. The math scale covers knowledge of measurement, geometry, data analysis, probability, and algebra, and ranges from 0 to 500.41 The data
are available for 2000, 2003, 2005, 2007, 2009, and 2011, but we only use 2003
through 2009. The 2000 data do not cover all 50 states and our other variables are
not updated to 2011. For the 2009 data the scores for math ranged from 265 to
299 with a standard deviation of 7.6 points.
Our independent variable of interest is the share of income going to the middle 60
percent of the income distribution. We adopt this definition of the middle classfrom work on economic growth and the middle class by William Easterly.42 These
data are from the Current Population Survey and the American Community
Survey. Note that using a similar definition of the middle class—the share ofincome going to the middle 20 percent—produced very similar results. These
definitions of middle class are similar because they are both affected similarly by
the rise in income share going to the top. The standard deviation of middle-classshare is 2.12 percentage points. A one standard deviation increase in middle-classshare would translate into a 1.46 point increase on the NAEP scale.
We control for demographic features of a state that may affect educational attainment: overall income levels, child poverty levels, and the percentage of students
who are English language learners.
Wealthier societies tend to have better educational outcomes due to more available resources. Research that compares educational outcomes across countries
often controls for income level using national GDP per capita as a control variable.43 Accordingly, we account for state income level in our regressions byusing state GDP per capita as a control variable. The data are from the Bureau of
Economic Analysis and are available for all the years in our analysis.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

In contrast, we expect child poverty levels and the percentage of students who are
English language learners to be negatively correlated with educational attainment
due to the higher concentration of disadvantaged students.44 Studies on educational outcomes commonly control for levels of poverty and other factors that
impede academic achievement.45 Our measure of childhood poverty is the percentof those ages 17 and under who live in poverty. The data are from the Census
Bureau’s Small Area Income and Poverty Estimates. The data used to calculate thepercent of students who are English language learners is from the National Center
for Education Statistics. We used data on the number of students who are learning
English and total enrollment to calculate the percentages.
We control for state per-pupil education spending in one set of regressions. While
increased spending does not always result in better educational attainment, we
would expect that spending is positively correlated with outcomes.46 Including
spending in the regressions helps us confirm whether the relationship between the
middle-class share of income and achievement is not just due to higher spendingby middle-class states but also due to their “middle-classness.”
The spending data are from the Common Core of Data at the National Center for
Education Statistics. We deflated the figures using the Consumer Price Index for
All Urban Consumers from the Bureau of Labor Statistics. To confirm our results,
we also ran regressions with spending adjusted by the Comparable Wage Index.
The index is often used in studies of education spending to adjust for regional
differences in labor markets.47 The regressions using CWI-adjusted spending
were generally similar to our main results but the limited availability of the CWI
restricted our sample size.

ModelsWe use three different econometric models in this study but our preferred model
uses panel-corrected standard errors, or PCSE. We also ran regressions using apooled ordinary least squares, or OLS, method and state and year fixed effects.
The results of all three models are included in this report but we use the results of
the regressions using PCSE in the body of the paper. We believe PCSE is the best
choice because the share of income going to the middle class, the independent
variable of interest, is relatively slow moving over time.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated NationPCSE was first described by Nathaniel Beck, a political scientist at New York
University, and Jonathan Katz, a professor of social sciences and statistics at the
California Institute for Technology, and has since become common in the study ofpolitical economy. PCSE is a method to improve the accuracy of estimates whenusing time-series cross-sectional data. 48 Time-series cross-sectional data are characterized by repeated observations (often annual) on the same fixed political units(usually states or countries), and thus the data are often correlated over time.
As Nathaniel Beck and Jonathan Katz argue, “The inclusion of fixed effects almost
always masks the impact of slowly changing independent variables.”49 They argue
that using fixed effects with time-series cross-sectional data that have slowly
changing variables of interest is not just a minor problem but rather can be “profoundly misleading in assessing the impacts of important independent variables.
We stress that we are not simply talking about some minor changes in estimation
efficiency, but, rather estimates that are so far off as to be completely useless.”50
While we prefer PCSE, we show all of our specifications. The majority of thestudies we examined that studied similar questions use pooled OLS or similarlinear models that adjust standard errors.51 Using pooled OLS and PCSE models,
we find a relationship between the strength of the middle class and math scoresthat is significant at the 5 percent level. When we use fixed effects, the relationshipbetween the strength of the middle class and math scores is significant at the 10
percent level. That the middle class is associated with higher test scores across avariety of models provides strong support for our arguments. (see Figure 2 for thetabled results of our analysis)

FIGURE 2

Regression results indicate middle-class income shareassociated with educational outcomesThree different models produce similar results
Variable

Description

Strength of the middle class

The share of income going to the middle 60 percent of the income distribution

Eighth-grade math score

NAEP composite score for eighth-grade mathChild poverty rate

Percent of those 17 and under who are in poverty

English language learners

Percent of students who are English language learners

Spending per student

K-12 education spending per student

Per capita GDP ($2009)

Real gross domestic product per capita, in 2009 dollars

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Summary statistics
Variable

Observations

Mean

Min

Max

Strength of the middle class200

0.47720.42000.5228Eighth-grade math score200

280.04261

299

Child poverty rate

200

17.6

7.8

30.7

English language learners

181

0.061137

0.004535

0.251751

Spending per student

150

11,570.28

7,338.67

19,212.40

Per capita GDP ($2009)200

37,909.52

27,972.60

57,559.40

Regression results
Panel-corrected standard errors
Independent variable

Coefficientp-valueStrength of the middle class

68.64

0.030

Child poverty rate

-0.5780.015

English language learners-35.510.000

Per capita GDP ($2009)

0.00040.034

Coefficientp-valueR-squared: 0.4173
N: 181

Fixed effects
Independent variable
Strength of the middle class

19.26

0.087

Child poverty rate

0.11650.551

English language learners

-6.92

0.617

Per capita GDP ($2009)

0.0002

0.409

Independent variable

Coefficientp-valueStrength of the middle class

68.64

0.032

Child poverty rate

-0.5780.000

R-squared: 0.9706
N: 181Pooled OLSEnglish language learners-35.510.000

Per capita GDP ($2009)

0.00040.005

R-squared: 0.4173
N: 181

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

With spending controls
Panel-corrected standard errors
Independent variable

Coefficientp-valueStrength of the middle class

54.98

0.015

Child poverty rate

-0.7520.000

English language learners-32.430.000

Spending per student

0.00005

0.760

Per capita GDP ($2009)

0.00020.179

R-squared: 0.4748
N: 136

Fixed effects
Independent variable

Coefficientp-valueStrength of the middle class

19.31

0.091

Child poverty rate

0.18030.460

English language learners-13.280.453

Spending per student

0.00040.315

Per capita GDP ($2009)

0.000050.842

Coefficientp-valueR-squared: 0.9771
N: 136Pooled OLS
Independent variable
Strength of the middle class

54.98

0.087

Child poverty rate

-0.7520.000

English language learners-32.43

0.002

Spending per student

0.0001

0.872

Per capita GDP ($2009)

0.00020.273

R-squared: 0.4748
N: 13616

Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

About the authors
David Madland is the Director of the American Worker Project at the Center for

American Progress Action Fund. He has a Ph.D. in government from Georgetown
University and received his B.S. from the University of California at Berkeley.
His dissertation about the political reaction to the decline of the defined-benefit
retirement system was awarded the Best Dissertation Award by the Labor and
Employment Relations Association. Previously, he worked for Congressman George
Miller (D-CA) on the House Committee on Education and the Workforce as well as
the Resources Committee.
Nick Bunker is a Special Assistant with the Economic Policy team at the Center

for American Progress Action Fund. He works on issues related to economic
security and working conditions of the American worker. Nick graduated from
Georgetown University with a B.S. in international economics. During his undergraduate career, he was involved with student government and helped found amagazine on international affairs. Nick was an intern at CAP during the 2009-10
academic year. He was born and raised in Norwood, Massachusetts.

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Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

Endnotes
1

For international test scores, see: Jessica Shepard, “World education rankings: which country does best at reading, maths, andscience?”, DataBlog, December 7, 2010, available at http://www.
guardian.co.uk/news/datablog/2010/dec/07/world-educationrankings-maths-science-reading. For college graduation rates, see:Tamar Lewin, “Once a Leader, U.S. Lags in College Degrees,” The
New York Times, July 23, 2010, available at http://www.nytimes.
com/2010/07/23/education/23college.html.

2

Business leaders are collaborating with the public sector in an
attempt to improve the educational system. See: Ezra Mechaber,“Staying Competitive Through Education: The President and American Business Leaders Announce New Commitments,” The WhiteHouse Blog, July 18, 2011, available at http://www.whitehouse.gov/
blog/2011/07/18/staying-competitive-through-education-president-and-american-business-leaders-announ.

3

Data on share of income going to top 1 percent are from: Thomas
Piketty and Emmanuel Saez, “Income Inequality in the United States,
1913 – 1998,” Quarterly Journal of Economics 118 (1) (2003): 1–39.
Data on the share of going to the middle 60 percent and bottom 20
percent are from: “Share of Aggregate Income Received by Each Fifth
and Top 5 Percent of Households,” available at http://www.census.
gov/hhes/www/income/data/historical/household/index.html (lastaccessed October 2011).

4David Madland and Nick Bunker, “Middle Class Societies Invest Morein Public Education” (Washington: Center for American Progress
Action Fund, 2011).

5

Richard D. Kahlenberg, All Together Now: Creating Middle-Class
Schools through Public School Choice (Washington: Brookings Institute Press, 2001).

6

Mathias Doepke and Fabrizio Zilibotti, “Occupational Choice and theSpirit of Capitalism.” Working Paper 2007-049 (Humboldt-Universität
zu Berlin, School of Business and Economics, 2007).

7

Phillip B. Levine and Diane Schanzenbach, “The Impact of Children’s
Public Health Insurance Expansions on Educational Outcomes,”
Forum for Health Economics & Policy 12 (1) (2009): 1–26; Robert
Wilkinson, “The epidemiological transition from material society tosocial disadvantage?”, Daedalus 123 (4) (1994): 61–77.

8

V.J. Roscigno and J.W. Ainsworth-Darnell, “Race, cultural capital andeducational resources: Persistent inequalities and achievement
returns,” Sociology of Education 72 (3) (1999): 158–178; Pamela E.
Davis-Kean, “The Influence of Parent Education and Family Income
on Child Achievement: The Indirect Role of Parental Expectations
and the Home Environment,” Journal of Family Psychology 19 (2)(2005): 294–304.

9

Adena M. Klem and James P. Connell, “Relationships Matter: Linking Teachers Support to Student Engagement and Achievement,”
Journal of School Health 74 (7) (2004): 262–273.

10 Richard Wilkinson and Kate Pickett, The Spirit Level: Why Greater
Equality Makes Societies Stronger (London: Bloomsbury Press,2009); Ming Ming Chiu and Lawrence Khoo, “Effects of Resources,
Inequality, and Privilege Bias on Achievement: Country, School, andStudent Level Analyses,” American Educational Research Journal 42 (4)(2005): 575–603; Dennis J. Condron, “Egalitarianism and Educational
Excellence: Compatible Goals for Affluent Societies?”, Educational
Researcher 40 (2) (2011): 47–55.
11 Condron, “Egalitarianism and Educational Excellence.”

13 For studies that do account for poverty, see, for example: Chiu andKhoo, “Effects of Resources, Inequality, and Privilege Bias on Achievement”; Amita Chudgar and Thomas F. Luschei, “National income,income inequality, and the importance of schools: A hierarchicalcross-national comparison,” American Educational Research Journal
46 (3) (2009): 626–658.
14 Kahlenberg, All Together Now; Heather Schwartz, “Housing Policy is
School Policy: Economically Integrative Housing Promotes Academic
Success in Montgomery County, Maryland” (Washington: The
Century Foundation, 2010); Chudgar and Luschei, “National income,income inequality, and the importance of schools.” Chiu and Khoo,“Effects of Resources, Inequality, and Privilege Bias on Achievement”; Ming Ming Chiu, “Effects of Inequality, Family and School onMathematics Achievement: Country and Student Differences,” Social
Forces 88 (4) (2010): 1645–1676.
15 Piketty and Saez, “Income Inequality in the United States, 1913–
1998”; “Share of Aggregate Income Received by Each Fifth and Top 5
Percent of Households.”
16 Organisation for Economic Co-operation and Development, “Growing Unequal?: Income Distribution and Poverty in OECD Countries”(2008); “The World Top Income Database,” available at http://g-mond.
parisschoolofeconomics.eu/topincomes/ (last accessed September2011).
17 Condron, “Egalitarianism and Educational Excellence.”
18 Chudgar and Luschei, “National income, income inequality, andthe importance of schools.” Chiu and Khoo, “Effects of Resources,
Inequality, and Privilege Bias on Achievement”; Chiu, “Effects ofInequality, Family and School on Mathematics Achievement.”
19 David P. Baker, Brian Goesling, and Gerald K. Letendre, “Socioeconomic Status, School Quality, and National Economic Development,”
Comparative Economic Review 46 (3) (2002): 291–312; Adam Gamoran and Daniel A. Long, “Equality of Educational Opportunity: A 40
Year Perspective.” In Richard Teese, Stephen Lamb, and Marie DuruBellat, eds., Education and Equity: International Perspectives on Theory
and Policy (New York: Springer, 2006); Claudia Buchman, “Measuring
Family Background in International Studies of Education.” In Andrew
C. Porter and Adam Gamoran, eds., Methodological Advances in
Cross-national Surveys of Educational Achievement, National ResearchCouncil (Washington: National Academy Press, 2002); Bruce Fuller
and Prema Clarke, “Raising School Effects While Ignoring Culture?”,Review of Educational Research 57 (3) (1994): 119–157.
20 On efficiency, see: Ulrich Boser, “Return on Educational Investment:
A District-by-District Evaluation of U.S. Educational Productivity”(Washington: Center for American Progress, 2011). On marginal
returns of education spending, see: Chiu and Khoo, “Effects ofResources, Inequality, and Privilege Bias on Achievement.”
21 David P. Baker, Brian Goesling, and Gerald K. Letendre, “Socioeconomic Status, School Quality, and National Economic Development,”
Comparative Economic Review 46 (3) (2002): 291–312; Adam Gamoran and Daniel A. Long, “Equality of Educational Opportunity: A 40
Year Perspective.” In Richard Teese, Stephen Lamb, and Marie DuruBellat, eds., Education and Equity: International Perspective on Theory
and Policy (New York: Springer, 2006); Claudia Buchman, “Measuring
Family Background in International Studies of Education.” In Andrew
C. Porter and Adam Gamoran, eds., Methodological Advances in
Cross-national Surveys of Educational Achievement, National ResearchCouncil (Washington: National Academy Press, 2002); Bruce Fuller
and Prema Clarke, “Raising School Effects While Ignoring Culture?”,Review of Educational Research 57 (3) (1994): 119–157.

12 Wilkinson and Pickett, The Spirit Level.

18

Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

22 David Callahan, The Cheating Culture: Why More Americans Are
Doing Wrong to Get Ahead (New York: Houghton Mifflin Harcourt,2004); Eric M. Uslaner, Corruption, Inequality, and the Rule of Law:
The Bulging Pocket Make the Easy Life; Alberto Chong and Mark
Gradstein, “Inequality and Institutions,” The Review of Economics andStatistics 89 (4) (2007): 454–465; Karla Hoff and Joseph Stiglitz, “Afterthe Big Bang? Obstacles to the Emergence of the Rule of Law in
Post-Communist Societies,” American Economic Review 94 (3) (2004):
753–763; Konstantin Sonin, “Why the rich may favor poor protectionof property rights,” Journal of Comparative Economics 31 (4) (2003):
715–731; Philip Keefer and Stephen Knack, “Polarization, Politics andProperty Rights: Links Between Inequality and Growth,” Public Choice
111 (2) (2002): 127–154.
23 Chiu and Khoo, “Effects of Resources, Inequality, and Privilege Biason Achievement”; Gamoran and Long, “Equality of Educational Opportunity: A 40 Year Perspective.”
24 Kahlenberg, All Together Now.
25 Frederick Solt, “Economic Inequality and Democratic Political Engagement,” American Journal of Political Science 52 (1) (2008): 48–60;
Joe Soss and Lawrence R. Jacobs, “The Place of Inequality: Non
Participation in the American Polity,” Political Science Quarterly 124(1) (2009); Geraldine Downey and Phyllis Moen, “Personal Efficacy,
Income, and Family Transitions: A Longitudinal Study of Women
Heading Households,” Journal of Health and Social Behavior 28 (3)(1987): 320–333; Jan Delhey and Kenneth Newton, “Who trusts?:
The origins of social trust in seven societies,” European Societies 5 (2)(2003): 93–137; Eric M. Uslaner, The Moral Foundations of Trust (NewYork: Cambridge University Press, 2002); Bo Rothstein and Eric M.
Uslaner, “All for One: Equality, Corruption, and Social Trust,” World
Politics 58 (1) (2005): 41–72.
26 Frederick Solt, “Economic Inequality and Democratic Political Engagement,” American Journal of Political Science 52 (1) (2008): 48–60;
Joe Soss and Lawrence R. Jacobs, “The Place of Inequality: Non
Participation in the American Polity,” Political Science Quarterly 124(1) (2009).

34 Wilkinson and Pickett, The Spirit Level; James P. Connell and Bonnie L.
Halpern-Felsher, “How Neighborhoods Affect Educational Outcomesin Middle Childhood and Adolescence: Conceptual Issues and an
Empirical Example.” In Jeanne Brooks-Gunn, Greg J. Duncan, and J.
Lawrence Aber, eds., Neighborhood Poverty: Context and Consequences
for Children (New York: Russell Sage Foundation, 1997).
35 V.J. Roscigno and J.W. Ainsworth-Darnell, “Race, cultural capital andeducational resources: Persistent inequalities and achievement
returns,” Sociology of Education 72 (3) (1999): 158–178; Pamela E.
Davis-Kean, “The Influence of Parent Education and Family Income
on Child Achievement: The Indirect Role of Parental Expectations
and the Home Environment,” Journal of Family Psychology 19 (2)(2005): 294–304.
36 George A. Akerlof, “Social Distance and Social Decisions,” Econometrica 65 (5) (1997): 1005–1027.
37 Mattias Doepke and Fabrizio Zilibotti, “Occupational Choice andthe Spirit of Capitalism,” The Quarterly Journal of Economics 123(2) (2008): 747–793; Abhijit V. Banerjee and Esther Duflo, “What is
Middle Class about the Middle Classes around the World?”, Journal of
Economic Perspectives 22 (2) (2008): 3–28.
38 Kahlenberg, All Together Now.
39 Robert K. Merton, “Social Structure and Anomie,” American Sociological Review 3 (5) (1938): 672–682; Andrew Steptoe and others,“Depressive symptoms, socio-economic background, sense of control, and cultural factors in University students from 23 countries,”
International Journal of Behavioral Medicine 14 (2) (2007): 97–107.
40 We also ran our model with reading scores. We found a statistically significant relationship between the middle class and readingscores, even with control variables, until we added measures ofpoverty to the model.
41 “The NAEP Mathematics Scale,” available at http://nces.ed.gov/nationsreportcard/mathematics/scale.asp.

27 Theda Skocpol and Jillian Dickert, “Speaking for Families andChildren in a Changing Civic America.” In Carol J. De Vita and Rachel
Mosher-Williams, eds., Who Speaks for America’s Children?: The Roleof Child Advocates in Public Policy (Washington: The Urban InstitutePress, 2001); Theda Skocpol, Diminished Democracy: From Membership to Management in American Civic Life (Norman, OK: University ofOklahoma University Press, 2004).

42 Easterly, “The Middle Class Consensus.”

28 Robert Putnam, Bowling Alone: The Collapse and Revival of American
Community (New York: Simon and Schuster, 2001). In other writings,
Putman has also highlighted the role of increased work hours formothers has had on the decline of PTA membership. See: Robert
Putnam, “Bowling Alone: America’s declining social capital,” Journalof Democracy 1 (6) (1995): 65–78.

45 Chudgar and Luschei, “National Income, Income Inequality, and theImportance of Schools.”

29 Wilkinson and Pickett, The Spirit Level.
30 George A. Kaplan and others, “Income inequality and mortality in
the United States,” BMJ 312 (7037) (1996).
31 Ichiro Kawachi and others, “Social Capital, Income Inequality, andMortality,” American Journal of Public Health 87 (9) (1997): 1491–1498;
James S. House, Karl R. Landis, and Debra Umberson, “Social Relationships and Health,” Science 241 (4865) (1988): 540–545.
32 Wilkinson, “The epidemiological transition from material society tosocial disadvantage?”
33 Levine and Schanzenbach, “The Impact of Children’s Public Health
Insurance Expansions on Educational Outcomes,” Forum for Health
Economics & Policy 12 (1) (2009): 1–26.

43 Dennis J. Condron, “Egalitarianism and Educational Excellence”; Chiu
and Khoo, “Effects of Resources, Inequality, and Privilege Bias on
Achievement.”
44 Boser, “Return on Educational Investment.”

46 Baker, Goesling, and Letendre, “Socioeconomic Status, School Quality, and National Economic Development.”
47 The spending data in “Return on Educational Investment” is adjusted
by the CWI. For more on the index, see: Lori L. Taylor and William
J. Fowler, Jr., “A Comparable Wage Approach to Geographic Cost
Adjustment,” (Washington: Education Finance Statistical Center,
National Center for Education Statistics, 2006).
48 Nathaniel Beck and Jonathan N. Katz, “Nuisance vs. substance:
specifying and estimating time-series–cross-section models,” Political Analysis 6 (1) (1996): 1–36; Nathaniel Beck, “Times-Series-CrossSection Data: What Have We Learned in the Past Few Years?”, Annual
Review of Political Science 4 (1) (2001): 271–293.
49 Nathaniel Beck and Jonathan N. Katz, “Throwing Out the Baby With
the Bath Water: A Comment on Green, Kim and Yoon,” International
Organization 55 (2) (2001).
50 Ibid.
51 Chiu and Khoo, “Effects of Resources, Inequality, and Privilege Biason Achievement”; Chiu, “Effects of Inequality, Family and School onMathematics Achievement.”

19

Center for American Progress Action Fund | The Middle Class Is Key to a Better-Educated Nation

The Center for American Progress Action Fund transforms progressive ideas into policy
through rapid response communications, legislative action, grassroots organizing andadvocacy, and partnerships with other progressive leaders throughout the country andthe world. The Action Fund is also the home of the Progress Report and ThinkProgress.

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