Abstract

The U. S. Bureau of the Census recently released a set of population projections that include middle and high projections that we argue are too conservative. The projections discount the possibility of future baby booms and assume slow rates of mortality decline and low levels of immigration. In this article we explore the impact on the size and age composition of the U. S. population of alternative scenarios of plausible fertility, mortality, and immigration assumptions. We conclude that (I) the Census Bureau’s highest projection might be interpreted as a reasonable middle projection, (2) a reasonable high projection would yield a U.S. population in 2080 some 300 million persons larger than the Bureau’s highest projection, with the population 85 and older more than twice the Bureau’s greatest estimate, and (3) uncertainty about the pace of population growth is substantially greater than the Bureau’s projections suggest.

References

Ahlburg, D. A. (
1982
).
How Accurate Are the US Bureau of the Census Projections of Total Live Births?
.
Journal of Forecasting
,
1
,
365
374
. 10.1002/for.3980010404
Ahlburg, D. A. (
1983
).
Good Times, Bad Times: A Study of the Future Path of U.S. Fertility
.
Social Biology
,
30
,
1723
1723
.
Ahlburg, D. A. (
l987
).
Population Forecasting
. In S. Makridakis, & S. Wheelwright (Eds.),
The Handbook of Forecasting
(pp.
135
149
). 2nd ed.
New York
:
Wiley
.
Ahlburg, D. A. (
1987
).
Modeling Economic-Demographic Linkages: A Study of National and Regional Models
. In K. Land, & S. Schneider (Eds.),
Forecasting in the Social and Natural Sciences
(pp.
287
336
).
Dordrecht, Netherlands
:
Riedel
.
Ahlburg, D. A. (
1989
).
Demographic and Economic Change in the American Family: 1940–1985
.
Minneapolis
:
University of Minnesota, Center for Population Analysis and Policy
.
Alho, J. M. (In press). “Stochastic Methods in Population Forecasting.” International Journal of Forecasting.
Ascher, W. (
1978
).
Forecasting: An Appraisal for Policy Makers and Planners
.
Baltimore, MD
:
Johns Hopkins Univerity Press
.
Bean, F. D., Schmandt, J., & Weintraub, S. (
1989
).
Mexican and Central American Population and U.S. Immigration Policy
.
Austin
:
University of Texas Press
.
Bean, F. D., Vernez, G., & Keeley, C. B. (
1989
).
Openingand Closing the Doors: Evaluating Immigration Reform and Control
.
Washington, DC
:
Urban Institute Press
.
Behn, R. D., & Vaupel, J. W. (
1979
).
Quick Analysis for Busy Decision Makers
.
New York
:
Basic Books
.
Behrman, J. R., & Taubman, P. (
1989
).
A Test of the Easterlin Fertility Model Using Income for Two Generations and a Comparison With the Becker Model
.
Demography
,
26
,
117
124
. 10.2307/2061498
Berger, M. (
1984
).
Cohort Size and the Earnings Growth of Young Workers
.
Industrial and Labor Relations Review
,
37
,
582
591
. 10.2307/2523674
Berger, M. (
1985
).
The Effect of Cohort Size on Earnings Growth: A Reexamination of the Evidence
.
Journal of Political Economy
,
93
,
561
573
. 10.1086/261315
Berger, M. (
1989
).
Demographic Cycles, Cohort Size, and Earnings
.
Demography
,
26
,
311
322
. 10.2307/2061528
Butz, W. P., & Ward, M. P. (
1979
).
The Emergence of Countercyclical U.S. Fertility
.
American Economic Review
,
69
,
318
328
.
Clark, R. (
1976
).
The Influence of Law Fertility Rates and Retirement Policy on Dependency Costs
.
Washington, DC
:
American Institutes for Research
.
Clark, R., & Spengler, J. (
1980
).
Dependency Ratios:Their Use in Economic Analysis
. In J. Simon, & P. Lindert (Eds.),
Research in Population Economics
(pp.
63
76
).
Greenwich, CT
:
JAI Press
.
Cohen, J. E. (
1986
).
Population Forecasts and Confidence Intervals for Sweden: A Comparison of Model-Based and Empirical Approaches
.
Demography
,
23
,
105
126
. 10.2307/2061412
Crimmins, E. (
1981
).
The Changing Pattern of American Mortality Decline
.
Population and Development Review
,
7
,
229
254
. 10.2307/1972622
Crimmins, E., Saito, Y., & Ingegneri, D. (
(1989
).
Changes in Life Expectancy and Disability-Free Life Expectancy in the United States
.
Population and Development Review
,
15
,
235
268
. 10.2307/1973704
Demeny, P. (
1984
).
Perspective on Long-Term Population Growth
.
Population and Development Review
,
10
,
103
126
. 10.2307/1973168
Easterlin, R. (
1987
).
Birth and Fortune
. 2nd ed.
Chicago
:
University of Chicago Press
.
Farber, J. F. (
1982
).
Life Tables for the United States: 1900–2050
.
Washington, DC
:
U.S. Dept. of Health and Human Services
.
Fries, J. F., & Crapo, L. M. (
1981
).
Vitality and Aging
.
San Francisco
:
Freeman
.
Greenwood, M. J., & McDowell, J. M. (
1986
).
The Factor Market Consequences of U.S. Migration
.
Journal of Economic Literature
,
24
,
1738
1772
.
Guralnik, J. M., & Schneider, E. L. (
1987
).
The Compression of Morbidity: A Dream Which May Come True Someday
.
Gerontologica Perspecta
,
1
,
23
30
.
Himes, C. L., Condran, G. A., & Preston, S. H. (1990). “A Comparison of Old Age Mortality Patterns in Low Mortality Countries.” Paper presented at the Annual Meeting of the Population Association of America, Toronto.
Jasso, G., & Rosenzweig, M. R. (
1990
).
The New Chosen People: Immigrants in the United States
.
New York
:
Russell Sage
.
R. L. Kane, J. G. Evans, & D. Macfadyen (
1989
).
Improving the Health of Older People
.
Oxford, UK
:
Oxford University Press
.
Keyfitz, N. (
1981
).
The Limits of Population Forecasting
.
Population and Development Review
,
7
,
579
593
. 10.2307/1972799
Keyfitz, N. (
1982
).
Population Change and Social Policy
.
Cambridge, MA
:
Abt
.
Kramer, W., & Neusser, K. (
1984
).
The Emergence of Countercyclical U.S. Fertiity: Note
.
American Economic Review
,
74
,
201
202
.
Land, K. C. (
1986
).
Methods for National Population Forecasts: A Review
.
Journal of the American Statistical Association
,
81
,
888
901
. 10.2307/2289057
Lee, R. D. (
1974
).
Forecasting Births in Post-transition Populations
.
Journal of the American Statistical Association
,
69
,
607
617
. 10.2307/2285990
Lee, R. D. (
1987
).
Population Dynamics of Humans and Other Animals
.
Demography
,
24
,
443
465
. 10.2307/2061385
Lee, R. D., & Carter, L. (1990). “Modeling and Forecasting the Time Series of U.S. Mortality.” Paper presented at the Annual Meeting of the Population Association of America, Toronto.
Lillard, L. A., & Macunovich, D. J. (
1988
).
Why the Baby Bust Cohorts Haven’t Boomed Yet: A Reconsideration of Cohort Variables in Labor Market Analysis
.
Santa Monica, CA
:
RAND Corp
.
Long, J. F., & McMillen, D. B. (
1987
).
A Survey of Census Bureau Population Projection Methods
. In K. C. Land, & S. H. Schneider (Eds.),
Forecasting in the Social and Natural Sciences
(pp.
141
178
).
Dordrecht, Netherlands
:
Reidel
.
Lusky, R. A. (
1986
).
Anticipating the Needs of the U.S. Aged in the 21st Century: Dilemmas in Epidemiology, Gerontology, and Public Policy
.
Social Science Medicine
,
23
,
1217
1227
. 10.1016/0277-9536(86)90284-4
Macunovich, D. J. (1990). “An Evaluation of the Butz Ward Hypothesis of Counter-cyclical Fertility.” Paper presented at the Annual Meeting of the Population Association of America, Toronto.
Manton, K. G. (
1987
).
Forecasting Health Status Changes in an Aging U.S. Population: Assessment of the Current Status and Some Proposals
. In K. C. Land, & S. H. Schneider (Eds.),
Forecasting in the Social and Natural Sciences
(pp.
179
210
).
Dordrecht, Netherlands
:
Reidel
.
Morrison, P. A. (
1986
).
America’s Dependents?
.
Santa Monica, CA
:
RAND Corp.
.
Murphy, M. J. (
1984
).
Population Forecasting: Alternative Approaches
.
London
:
Office of Population Census and Surveys
.
Myers, G. C. (
1981
).
Future Age Projections and Society
. In A. Gilmore (Ed.),
Aging: A Challenge to Science and Social Policy
.
Oxford, UK
:
Oxford University Press
.
Myers, G. C., & Manton, K. G. (
1984
).
Compression of Mortality: Myth or Reality?
.
Gerontologist
,
24
,
346
353
.
Olshanksy, J. (
1988
).
On Forecasting Mortality
.
Mil/bank Quarterly
,
66
,
482
530
. 10.2307/3349966
Rosenfeld, A. (
1985
).
Prolongevity
. 2nd ed.
New York
:
Knopf
.
Sauvy, A. (
1969
).
General Theory of Population
.
New York
:
Basic Books
.
Scott, P., & Johnson, P. (
1988
).
The Economic Consequences of Population Ageing in Advanced Societies
.
London
:
Centre for Economic Policy Research
.
Siegel, J. S. (
1972
).
Development and Accuracy of Projections of Population and Households in the United States
.
Demography
,
9
,
51
68
. 10.2307/2060545
Spencer, G. (
1989
).
Projections of the Population of the United States, by Age, Sex, and Race: 1988 to 2080
.
Washington, DC
:
U.S. Government Printing Office
.
Stoto, M. A. (
1983
).
The Accuracy of Population Projections
.
Journal of the American Statistical Association
,
78
,
13
20
. 10.2307/2287094
Teitelbaum, M. S. (
1986
).
Intersections: Immigration and Demographic Change and Their Impact on the United States
. In J. Menken (Ed.),
World Population and U.S. Policy
(pp.
133
174
).
New York
:
Norton
.
Tuliapurkar, S. (
1987
).
Cycles in Non-linear Age-Structured Models. I: Renewal Equations
.
Theoretical Population Biology
,
32
,
26
41
. 10.1016/0040-5809(87)90037-2
Vaupel, J. W. (
1986
).
How Change in Age-Specific Mortality Affects Life Expectancy
.
Population Studies
,
40
,
147
157
. 10.1080/0032472031000141896
Vaupel, J. W., & Gowan, A. E. (
1986
).
Passage to Methuselah: Some Demographic Consequences of Continued Progress Against Mortality
.
American Journal of Public Health
,
76
,
430
433
. 10.2105/AJPH.76.4.430
Vaupel, J. W., Manton, K. G., & Stallard, E. (
1979
).
The Impact of Heterogeneity in Individual Frailty on the Dynamics of Mortality
.
Demography
,
16
,
439
454
. 10.2307/2061224
Verbrugge, L. M. (
1984
).
Longer Life but Worsening Health?
.
Millbank Memorial Fund Quarterly/Health and Socieity
,
62
,
475
519
. 10.2307/3349861
Wachter, K., & Lee, R. D. (
1987
).
American Limit Cycle Oscillations
.
Berkeley
:
University of California, Graduate Group in Demography
.
Wachter, M. L. (
1975
).
A Time-Series Fertility Equation: The Potential for a Baby-Boom in the 1980s
.
International Economic Review
,
16
,
609
624
. 10.2307/2525999
Walford, R. L. (
1983
).
Maximum Life Span
.
New York
:
Norton
.
Welch, F. (
1979
).
Effects of Cohort Size on Earnings: The Baby Boom’s Financial Bust
.
Journal of Political Economy
,
87
,
s65
s98
. 10.1086/260823
Wolf, D., Wils, B., Lutz, w., & Scherbov, S. (
1988
).
Population Futures for Europe: An Analysis of Alternative Scenarios
(pp.
653
654
).
Laxenburg, Austria
:
International Institute for Applied Systems Analysis
.