Americans used to be the tallest people in the world, but have been falling behind other nations since World War II. The Associated Press talked to scholars in demography and economics about the possible causes and implications of this trend (AP via Centre Daily Times).
See also:
John Komlos & Benjamin E. Lauderdale (2007). Underperformance in affluence: The remarkable relative decline in U.S. heights in the second half of the 20th century. Social Science Quarterly 88(2): 283–305. [Available online to Penn State faculty, staff, and students.]
John Komlos & Benjamin E. Lauderdale (2007). The mysterious trend in American heights in the 20th century. Annals of Human Biology 34(2): 0301-4460. [Available online to Penn State faculty, staff, and students.]
John Komlos & Benjamin E. Lauderdale (in press). Spatial correlates of US heights and body mass indexes, 2002. Journal of Biosocial Science. [Available online to Penn State faculty, staff, and students.]
Eileen M. Crimmins & Caleb E. Finch (2006). Infection, inflammation, height, and longevity. Proceedings of the National Academy of Sciences 103: 498-503. [Available online to Penn State faculty, staff, and students.]