Ariane Breitfelder

Department of Economics
University of Munich
Ludwigstr. 33/IV
80539 Munich

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: University of Munich

NBER Working Papers and Publications

March 2008The Transition to Post-industrial BMI Values Among US Children
with John Komlos, Marco Sunder: w13898
In our opinion, the trend in the BMI values of US children has not been estimated accurately. We use five models to estimate the BMI trends of non-Hispanic US-born black and white children and adolescents ages 2-19 born 1941-2006 on the basis of all NHES and NHANES data sets. We also use some historical BMI values for comparison. The increase in BMIZ values during the period considered was on average 1.3`sigma` (95% CI: 1.16`sigma`; 1.44`sigma`) among black girls, 0.8`sigma` for black boys, 0.7`sigma` for white boys, and 0.6`sigma` for white girls. This translates into an increase in BMI values of some 5.6, 3.3, 2.4, and 1.5 units respectively. While the i...

Published: The transition to post-industrial BMI values among US children John Komlos1,*, Ariane Breitfelder1, Marco Sunder2 Article first published online: 5 NOV 2008 DOI: 10.1002/ajhb.20806 Copyright © 2008 Wiley-Liss, Inc. Issue American Journal of Human Biology American Journal of Human Biology Volume 21, Issue 2, pages 151–160, March/April 2009

August 2007The height of US-born non-Hispanic children and adolescents ages 2-19, born 1942-2002 in the NHANES Samples
with John Komlos: w13324
We examine the height of non-Hispanic US-born children born 1942-2002 on the basis of all NHES and NHANES data sets available. We use the CDC 2000 reference values to convert height into Height-for-Age z-scores stratified by gender. We decompose deviations from the reference values into an age-effect and a secular trend effect and find that after an initial increase in the 1940s, heights experienced a downward cycle to reach their early 1950s peak again only c. two decades later. After the early 1970s heights increased almost continuously until the present. Girls born in 2002 are estimated to be 0.35[sigma] and boys are 0.39[sigma] above their 1971 values implying an increase of circa 2.5 cm between birth cohorts 1971 and 2002 as an average of all ages (Table 3). Age effects are also subst...

Published: American Journal of Human Biology Volume 20, Issue 1, pages 66–71, January/February 2008

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