Accurate population estimates are critical to effective planning and policy. This study evaluates county population estimates using three different approaches to estimate domestic migration—typically the most volatile component of population change. Using the 2010 Census as a benchmark, it compares the standard net-migration approach to two gross migration approaches—a biregional approach and a multiregional approach that models migration between county pairs. The biregional model produces the lowest average error and is a good choice when producing estimates for a large number of diverse areas. The multiregional model works well for many counties, but is prone to extreme errors.
BlumermanL. M.VidalP. M.2009. “Uses of Population and Income Statistics in Federal Funds Distribution—With a Focus on Census Bureau Data.” In Governments Division Report Series, Research Report #2009-1. Washington, DC.
2.
GoldenkoffR.2009. “Census Data Are among Several Factors That Can Affect Funding Allocations.” In Testimony Before the Subcommittee on Information Policy, Census, and National Achives, Committee on Oversight and Government Reform. Washington, DC: United States General Accounting Office.
3.
GreenwoodM. J.1985. “Human Migration: Theory, Models, and Empirical Studies.”Journal of Regional Science25 (4): 521–44.
4.
IhrkeD. K.FaberC. S.KoerberW. K.2011. “Geographic Mobility: 2008 to 2009.” In Current Population Reports. Washington, DC: U.S. Census Bureau, Economic and Statistics Administration.
5.
IssermanA. M.1993. “The Right People, the Right Rates—Making Population Estimates with an Interregional Cohort-Component Model.”Journal of the American Planning Association59 (1): 45–64.
6.
KlostermanR.1990. Community Analysis and Planning Techniques. Savage, MD: Rowman & Littlefield.
7.
LongJ.1993. “Postcensal Population Estimates: States, Counties and Places.” In Technical Working Paper No. 3. Washington, DC: U.S. Bureau of the Census.
8.
PlaneD. A.Rogerson.P. A.1994. The Geographical Analysis of Population. New York: John Wiley.
9.
RayerS.2008. “Population Forecast Errors.”Journal of Planning Education and Research27 (4): 417–30.
10.
RogersA.1976. “Shrinking Large-Scale Population-Projections Models by Aggregation and Decomposition.”Journal of Regional Science9: 417–24.
11.
RogersA.1990. “Requiem for the Net Migrant.”Geographical Analysis22 (4): 283–300.
12.
RupasinghaA.Goetz.S. J.2004. “County Amenities and Net Migration.”Agricultural and Resource Economics Review33 (2): 245–54.
13.
ShryockH.SiegelJ. and Associates. 1973. The Methods and Materials of Demography. Washington, DC: U.S. Bureau of the Census.
14.
SmithS. K.1986. “Accounting for Migration in Cohort-Component Projections of State and Local Populations.”Demography23 (1): 127–35.
15.
SmithS. K.1987. “Tests of Forecast Accuracy and Bias for County Population Projections.”Journal of the American Statistical Association82: 991–1003.
16.
SmithS. K.SwansonD. A.1998. “In Defense of the Net Migrant.”Journal of Economic & Social Measurement24 (3/4): 249–64.
WilsonT.BellM.2004. “Comparative Empirical Evaluations of Internal Migration Models in Subnational Population Projections.”Journal of Population Research21 (2): 127–60.
