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The Trend of BMI Values Among US Adults

37 Pages Posted: 24 Mar 2010  

John Komlos

Ludwig Maximilian University of Munich - Faculty of Economics; CESifo (Center for Economic Studies and Ifo Institute)

Marek Brabec

Department of Nonlinear Modeling, Institute of Computer Science, Academy of Sciences of the Czech Republic

Date Written: March 2010

Abstract

Background: The trend in the BMI values of the US population has not been estimated accurately because time series data are unavailable and because the focus has been on calculating period effects.

Object: To estimate the trend and rate of change of BMI values by birth cohorts stratified by gender and ethnicity born 1882-1986.

Methods: We use loess additive regression models to estimate age and trend effects of BMI values of US-born black and white adults measured between 1959 and 2006. We use all the NHES and NHANES survey data.

Results: The increase in BMI was already underway among the birth cohorts of the early 20th century. The rate of increase was fastest among black females; for the three other groups under consideration, the rates of increase were similar. The generally persistent upward trend was punctuated by upsurges, particularly after each of the two World Wars. That the estimated rate of change of BMI values increased by 71% among black females between the birth cohorts 1955 and those of 1965 is indicative of the rapid increases in their weight.

Conclusion: We inference that transition to post-industrial weights was a gradual process and began considerably earlier than hitherto supposed.

Keywords: BMI, US, NHANES, obesity, overweight, semiparametric modeling

JEL Classification: I10, N00

Suggested Citation

Komlos, John and Brabec, Marek, The Trend of BMI Values Among US Adults (March 2010). CESifo Working Paper Series No. 2987. Available at SSRN: https://ssrn.com/abstract=1573500

John Komlos (Contact Author)

CESifo (Center for Economic Studies and Ifo Institute)

Poschinger Str. 5
Munich, DE-81679
Germany

Ludwig Maximilian University of Munich - Faculty of Economics ( email )

Ludwigstrasse 28
Munich, D-80539
Germany

Marek Brabec

Department of Nonlinear Modeling, Institute of Computer Science, Academy of Sciences of the Czech Republic ( email )

Pod Vodarenskou vezi 2
Praha 8, 182 07
Czech Republic

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