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The Evolving U.S. Economy and Household Debt
Remarks for Household Debt Tipping Points Research Symposium
June 22, 2017
Karen Dynan
Harvard University and Peterson Institute for International Economics
I want to start by thanking the conference organizers, both for inviting me and for putting
together such an interesting program.
It is a pleasure to be given an opportunity to pull together themes from two areas that I have done
a lot of thinking about—household debt and the evolution of the broader economy. I specialized
in household debt for many years while I was at the Federal Reserve Board, having joined a
group that focused on household finances in the early 2000s (when that topic was still seen as a
sleepy backwater issue!). And, I have just finished 3½ years as the chief economist of the U.S.
Treasury Department, where the causes and implications of broad economic trends were a key
part of my work.
I will spend the first part of my talk on what I see as the implications of some trends in the
economy for household debt tipping points. Some of these trends are probably making
households more vulnerable to reaching tipping points, others make it more difficult for
policymakers to mitigate the immediate macroeconomic fallout from reaching tipping points, and
yet others make the longer-term effects of hitting tipping points more consequential than they
have been in the past.
You will note that I am starting with the negative aspects of the situation, and I wanted to do that
precisely because I have a captive group of smart researchers as an audience. My goal is not so
much to alarm you but rather to motivate the need to continue to build on the excellent research
that has already been done—before we reach the next tipping point.
In the second part of my talk, I will offer some more positive thoughts. In my view, there is good
news regarding both the current state of household balance sheets as well as progress in financial
regulation and other areas that should better protect households and the economy from household
debt tipping points.
I will conclude with some unfinished policy business as well as other things we should be doing
to reduce the likelihood that we reach tipping points and mitigate the consequences when we do
so.
Part 1: Economic Trends and Household Debt Tipping Points
Trends that are Probably Making Households More Vulnerable to Reaching Tipping Points
I will begin with some broad trends that, all else equal, have probably made U.S. households
more vulnerable to hitting tipping points when it comes to their use of debt.

1

The first is the limited growth in household incomes over the past few decades across much of
the distribution. The chart below shows growth in real household income from 1979 to 2013 for
two different parts of the income distribution. These series are from the Congressional Budget
Office (CBO), and they are thought to be the most comprehensive of the available measures
because they are designed to capture all types of income, including benefits and other noncash
income. The solid lines are market income and the dashed lines are after-tax-and-transfer
income.
The blue lines in the chart show household income growth in the middle quintile—essentially
capturing the experience of the typical household, although I will note that the story is not too
different for most of the middle and lower part of the distribution. The typical household has
seen little income growth over the 34 years for which we have data—just 11 percent for market
income and 33 percent for after-taxes-and-transfer income. These rates of growth are far lower
than what the top income quintile (shown in green) experienced—let alone the top 1 percent (not
shown) which saw growth roughly double that for the top quintile.

Growth in Real Household Incomes, 1979-2013
(solid lines = market income; dashed lines = after-tax-and-transfer income)
Percent
125
100
75

+ 88.3%
+ 84.7%

Top quintile

50
+ 33.1%

25

+ 11.2%

0
-25

Middle quintile

-50
1979
1984
1989
Source. Congressional Budget Office.

1994

1999

2004

2009

The second trend is that changes in the workplace in this country in recent decades imply that
income has become less predictable for many households. You have probably read about this in
the press, and there is a growing academic literature exploring the rise of “alternative work
arrangements”—including the so-called “gig” economy as well as other types of freelancers and
those doing contract work for companies. The chart below shows you estimates from Katz and
Krueger of the evolution of the share of the workforce accounted from by independent contract
workers, “on call” workers, temporary help agency workers, and workers provided by contract
firms from 1995 (the lightest blue bar) to 2015 (the darkest blue bar).1 Altogether, the share of
workers in alternative work arrangements has risen by nearly 50 percent over the past two
decades, from around 11 percent in 1995 to about 16 percent in 2015.
1

Katz, Lawrence F. and Alan B. Krueger (2016), “The Rise and Nature of Alternative Work Arrangements in the
United States, 1995-2015,” National Bureau of Economic Research Working Paper No. 22667.

2

Many of these arrangements have less predictable hours than a traditional arrangement. In
addition, there is literature, led by David Weil, a Brandeis professor and former Labor
Department official, exploring how these workers lack many of the other protections and benefits
that workers have in more traditional employment arrangements.2

Individuals with Alternative Work Arrangements
Percent of those employed
10

1995

2005

2015

8
6
4
2
0
Independent
contractors

On-call workers

Temporary help agency Workers provided by
workers
contract firms

Source. Katz and Krueger (2016); 2015 figures are the "alternative weights" estimates.

A third trend that I want to highlight is that more students are borrowing to attend colleges that
tend to add little to their earnings prospects. There is a lot of talk about the overall rise in student
debt (and I will return to the topic later), but what I want to focus on here is a finer point within
that broader trend. Specifically, there has been an enormous rise in borrowing by students who
are attending colleges that have poor records in terms of the future labor market outcomes of
their students. The graphic below is based on work by Adam Looney and Constantine Yannelis
for Brookings, and it shows the colleges whose students owed the most in 2000 (on the left) and
in 2014 (on the right).3
I want to highlight two things about this graphic. First, note the huge increase in magnitudes—
outstanding loans for the top 5 entries in 2000 ranged from 1½ to 2 billion dollars and loans for
the top 5 entries in 2014 ranged from 8 to 36 billion dollars. Second, note just how much more of
the money is going to for-profit higher education institutions, which are highlighted in yellow.
While the problem are not exclusively at for-profit colleges (nor are all for-profit colleges poor
performers), the Looney and Yannelis paper finds that students at for-profit colleges generally

2

Weil, David (2014) The Fissured Workplace: Why Work Became So Bad for So Many and What Can Be Done to
Improve It, Harvard University Press
3
Brookings (2015) ”Media Summary of ‘A Crisis in Student Loans? How Changes in the Characteristics of
Borrowers and the Institutions They Attend Contributed to Rising Loan Defaults’ by Adam Looney and Constantine
Yannelis..”

3

experience materially worse completion rates and go on to have materially higher unemployment
rates and materially lower incomes relative to their counterparts at many other types of schools.4

Why do these trends likely making households more vulnerable to tipping points? As has been
suggested by Rajan and others, limited income growth may engender more borrowing to “keep

4

Looney, Adam and Constantine Yannelis (2015) “A Crisis in Student Loans? How Changes in the Characteristics
of Borrowers and in the Institutions They Attended Contributed to Rising Loan Defaults,” Brookings Papers on
Economic Activity.

4

up with the Jones’s.”5 It may also increase the incentive for politicians to favor easy credit
policies to compensate for their constituents’ lack of income growth. Less predictable incomes
may increase the need for short-term expensive credit among people with limited financial assets
so that they can sustain spending in the face of unanticipated income shortfalls (with the caveat
that the rise of the gig economy may also help people buffer those shortfalls by, for example,
putting in extra hours driving for ride-hailing services). And, growth in enrollment and
borrowing colleges with poor outcomes means that more people will struggle to pay off student
debt.
Trends that Make It More Difficult to Mitigate the Immediate Macroeconomic Fallout from
Reaching Tipping Points
Now let me turn to some trends that make it more difficult for policymakers to mitigate the
immediate macroeconomic fallout from reaching household debt tipping points.
First, nominal interest rates are quite low now—partly (of course) because of accommodative
monetary policy but also because there has been a decades-long downtrend. The chart below
shows the decline in short-term rates (in blue) and 10-year rates (in orange). Rates should rise
from here as the stance of monetary policy normalizes, but most economists agree that the new
normal will be lower than it was a decade or two ago.

Interest Rates
Percent
20

15
10-year Treasury rate
10

Effective
federal
funds rate

5

0
1955

1965

1975

1985

1995

2005

2015

Source. Federal Reserve Board.

The second trend is that government debt has risen and is projected to rise further. The chart
below shows actual and projected federal debt relative to GDP from the Congressional Budget
Office. Debt rose during the financial crisis and is projected to rise further in coming years
because of population aging and ongoing increases in the cost of health care.

5

Rajan, Raghuram (2009) Fault Lines: How Hidden Fractures Still Threaten the World Economy, Princeton
University Press.

5

Federal Debt Held by the Public
120

Percent of GDP

Actual

Projected

2010

2020

100
80
60

40
20
0
1940

1950

1960

1970

1980

1990

2000

Source. Congerssional Budget Office.

I show you these trends because they make it harder for policymakers to mitigate the short-run
harms of reaching household debt tipping points. Academic work has demonstrated that the
downtrend in nominal interest rates means that the Fed will hit the zero lower-bound more often,
complicating the use of countercyclical monetary policy to support economic activity. 6 Low
interest rates also mean that inflation is likely to fall short of the Fed’s target more often, which
means that there is less scope for inflation to erode nominal debt burdens.
And, of course, high levels of government debt make it harder to use fiscal policy to counteract a
downturn in the economy.
Trends that Make the Longer-term Effects of Hitting Tipping Points More Consequential than in
the Past
The last two trends that I want to highlight are ones that make the longer-term effects of hitting
tipping points more consequential than in the past.
First of all, productivity growth—the output produced per unit of labor—has been low.
Productivity growth tends to be volatile from quarter to quarter but has trends over longer
periods. The chart below shows four eras of productivity growth identified by economists, with
the width of the bars corresponding to the length of the period. From left to right you can see a
long post-World-War-II boom, a slump from the mid-1970s to the mid-1990s, a brief pickup in
the late 1990s with the information-technology boom, and then low growth again beginning in
the early 2000s.
Of all macro challenges that concern me, I put low productivity growth at the top of the list,
partly because productivity is such an important determinant of household income. Other factors,
such as labor force participation and trends in income inequality also influence the income of the
6

See Kiley, Michael T. and John M. Roberts (2017) “Monetary Policy in a Low Interest Rate World,” Brookings
Papers on Economic Activity.

6

typical household, but slower productivity growth is the main reason why middle-class incomes
went from growing briskly in the first 25 years after World War II to experiencing very limited
growth over the past few decades.7

Productivity Growth
(percent change, annual rate)
3.3
2.8

1.6
1.3

1950-1973

1974-1995

1996-2003

2004-2017

Note: Nonfarm business sector. Time ranges correspond to different "eras" of productivity
growth; width of each bar corresponds to the duration of time.
Source. Bureau of Labor Statistics.

Relatedly, there has been a concerning downtrend in dynamism in the U.S. economy. The chart
below shows data on business-sector dynamism from a paper by Decker and co-authors.8 The
blue line shows a pronounced drop over the past few decades in the share of firms that are
young, from 50 percent in the early 1980s to 35 percent in 2011. The orange line shows a similar
drop in the share of employment associated with young firms. The rate of business start-up (not
shown) also shows a material decline over the past few decades.
This trend is important because less dynamism means less reallocation of resources to more
productive uses. While reallocation can be disruptive for firms and workers, it turns out to
significantly contribute to productivity growth. Indeed, Decker and coauthors conclude that
young firms are critical to innovative activity in our economy.
In my view, what these last two trends imply is that the longer-term effects of hitting tipping points are more consequential than in the past. To be specific, hitting tipping points causes
households and businesses to lose access to credit, and access to credit is key determinant of
productivity growth and business dynamism because people need to borrow to invest in human
capital and people need to borrow to invest in new businesses.

7

See Table 1-3 of the Economic Report of the President (2015).
See Decker, Ryan, John Haltiwanger, Ron Jarmin, and Javier Miranda (2014), “The Role of Entrepreneurship in
US Job Creation and Economic Dynamism,” Journal of Economic Perspectives 28(3).
8

7

Activity Measures for Young Firms (Age 5 or Less)
Percent

Percent
25

60
Share of firms that are
young (left axis)

50

20

40
15
30

Share of employment from
young firms (lright axis)

10

20
5

10

0

0
1982

1987

1992

1997

2002

2007

Source. Decker, Haltiwanger, Harmin, and Miranda (2014).

That is a list of the things that are keeping me up at night (actually, it’s a very incomplete list but
most of the other things are not directly related to this topic!). What I want to do now is spend a
little time on what I view as better news related to the topic of household debt tipping points.
Part 2: Some Better News
The Current State of U.S. Household Balance Sheets
Let me start with the current state of household balance sheets
Household Debt to Income Ratio

Household Debt Service Ratio

Percent of disposable income
140

Percent of disposable income
14
13

120

12

100
11

80
10

60
40
1980

9

1990

2000

8
1980

2010

Source. Federal Reserve Board.

1990

2000

Source. Federal Reserve Board.

8

2010

As you can see from the charts above, the traditional indicators—the main tools that we used to
assess the state of household balance sheets when I started working on the topic in the early
2000s—show enormous improvement. The aggregate debt-to-income ratio, on the left, is down
from a peak of 130 percent in 2007 to 102 percent right now, matching its level in late 2002.
And, reflecting both the drop in debt and the drop in interest rates, the aggregate debt service
ratio, on the right, is near its lowest level in the more than 35-year history of the series
Now, it would be a big mistake to just focus on the traditional aggregate indicators. One of the
lessons of the financial crisis is that one does not just want to watch households on average—one
needs to look at especially vulnerable groups. With that in mind, the next chart on the next page
shows underwater mortgages. As can be seen, the share of mortgages with negative equity has
dropped substantially, from more than 30 percent at its peak in 2012 according to Zillow to about
10 percent now.

Share of Mortgages with Negative Equity
Percent
35

30
25
20
15

10
5
0
2009

2010

2011

2012

2013

2014

2015

2016

Source. Zillow.

Delinquency rates also speak to how vulnerable groups are doing. The slide below shows that the
overall household serious delinquency rate as estimated by the New York Fed has largely
normalized. Even though the rate has stabilized at a level that is a bit above its pre-crisis range,
the pattern is consistent with a very large drop in the number of borrowers who are distressed.

9

Overall Household Debt Delinquency Rate
Percent of balances that are 90 or more days delinquent
10
8
6
4
2
0
1999

2002

2005

2008

2011

2014

2017

Source. Federal Reserve Bank of New York.

To be sure, there are some areas of concern. The most important in my view is student debt. As
shown in the panel on the left below, student debt as a share of overall household debt, at around
10 percent, is about triple what it was in the earlier 2000s. As shown in the panel on the right, the
delinquency rate on student debt rose in the wake of the Great Recession and has receded only a
little bit since then. This lack of significant improvement is partly why the overall delinquency
rate that I showed you in the last slide has not reverted to its previous norms.
Student Debt as a Share of
Overall Household Debt

Student Debt Delinquency Rate
Percent of balances 90+ days delinquent
14

Percent
12

12

10

10
8
8
6
6
4

4

2

2

0
2003

2006

2009

2012

0

2015

2003
2006
2009
2012
2015
Source. Federal Reserve Bank of New York.

Source. Federal Reserve Bank of New York.

To be clear, as I mentioned earlier, my chief concern is not about student debt broadly. For the
typical student, college remains an excellent investment, even taking account of rising costs (and

10

borrowing).9 My concern is about the students that have taken out material amounts of student
debt to finance educations that are not likely to pay off.
Another noteworthy feature of the student loan situation is who is at risk on the lender side.
These days, most student lending is funded by the federal government not private investors. So,
while defaults on student loans incur costs on U.S. taxpayers, they do not pose the same sort of
spillover risk to the financial system that, say, subprime mortgage lending did.
So, all in all, student loans are problem for the individual borrowers who have used loans to
finance educations that are not enhancing their earnings prospects, and we can see evidence of
that in their higher default rates. There is also some academic evidence that student debt may be
delaying homeownership (although it is unclear how important the effects are from a
macroeconomic point of view).10 The defaults are also imposing costs on taxpayers. For both
these reasons, I think we need better regulation of student loans. However, the available evidence
suggests that student loans do not post an immediate threat to macroeconomic stability.
To summarize, the current state of household balance sheets is, on the whole, good. The odds of
reaching a household debt tipping point in the near future is low, although we should certainly
keep monitoring the situation. We should be concerned about some aspects of student loans, but
the immediate risk to the macroeconomy from student loans is limited. There are a few other
problem areas (e.g. subprime auto lending)—and we should be watching them—but they are not
large by macro standards.
Progress in Financial Regulation and Other Areas
The other piece of good news is that the improvement in household balance sheets have
accompanied by important progress in financial regulation and other areas. Banks are lending
more prudently (with lending perhaps too conservative in some areas but that is a topic for
another day). Banks are also better capitalized and so better able to withstand households
reaching tipping points.
In addition, the new Consumer Financial Protection Bureau has taken constructive steps in terms
rule-writing, financial institution supervision, and that collectively should better protect
households from reaching debt tipping points.
Lastly, in conducting mortgage market interventions in the last crisis, through, for example, the
Home Affordable Modification Program and the Home Affordable Refinance Program, the
government learned valuable lessons about how to best design the programs to reach as many
struggling borrowers as possible. So it is better equipped to deal with another crisis.
Conclusion
9

See Abel, Jaison R. and Richard Deitz (2014) “Do the Benefits of College Still Outweigh the Costs?” Federal
Reserve Bank of New York.
10
See Mezza, Alvaro, Daniel R. Ringo, Shane M. Sherlund, and Kamila Sommer (2016) “On
the Effect of Student Loans on Access to Homeownership,” Federal Reserve Board Finance and Economics
Discussion Series 2016-010.

11

Let me conclude with a few thoughts on areas where more work needs to be done to reduce the
risk and consequences of hitting household debt tipping points.
There is important unfinished policy business related to household debt. We need legislation that
does comprehensive mortgage finance reform in order to put in place a new system that provides
broad ongoing access to mortgage credit without the incentives for excess risk-taking that
characterized the pre-crisis system.
We also need better regulation for student loans to address the problems that I discussed earlier. I
think the top priority here should be taking steps to hold colleges more accountable for the
quality of the services they offer. The so-called “gainful employment” regulations put in place by
the last Administration are a step in this direction, but I believe that we need something broader
and stronger like the “risk sharing” program that was proposed in a recent Brookings Hamilton
Project paper by Chou, Looney and Tara Watson.11
There are also some items we should be thinking about outside of policy. The first is the
potential for so-called “fintech” innovations to improve household debt management. It is great
that young adults have applications that help them track their income, assets, and liabilities that
my cohort did not have at their age. I hope these types of applications will get even better over
time.
The second is the scope for the private sector to develop new mortgage products that might better
protect households from reaching dangerous debt tipping points. For example, Eberly and
Krishnamurthy propose fixed-rate mortgages that have an option to convert to an adjustable-rate
loans even when the loans are underwater so that strained borrowers can more easily enjoy the
benefits of lower rates when the Fed eases in response to a downturn.12
And, finally, we need to keep pushing for more publicly available data for tracking and
researching household debt tipping points. This conference helps to demonstrate just how far we
have come from the days in which the topic household debt was a sleepy backwater topic for
researchers and policy analysts. And, the amount of household debt data that is internally tracked
and analyzed by many policy institutions is probably orders of magnitude larger than prior to the
crisis. But, I think it would be very constructive to have more indicators and data for research in
the public domain so there can be a fuller discourse among economists and analysts. In that
regard, I will close by commending the St. Louis Fed for developing its relatively new Quarterly
Debt Monitor, joining a few other parts of the Federal Reserve System and the government who
have been taking steps in this direction.

11

See Chou, Tiffany, Adam Looney and Tara Watson (2017) “A Risk Sharing Proposal for Student Loans”
Brookings Hamilton Project Proposal 2017-04.
12
See Eberly, Janice, and Arvind Krishnamurthy (2014) “Efficient Credit Policies in a Housing Debt Crisis”
Brookings Papers on Economic Activity.

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