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aldosterone

(Encyclopedia) aldosteronealdosteroneălˌdōstĭrōnˈ [key], steroid secreted by the cortex of the adrenal gland. It is the most potent hormone regulating the body's electrolyte balance. Aldosterone acts…

Kremer, Michael Robert

(Encyclopedia) Kremer, Michael Robert, 1964–, American economist, b. New York City, Ph.D. Harvard, 1992. After serving as a postdoctoral fellow (1992–93) at the Massachusetts Institute of Technology…

Deaton, Angus Stewart

(Encyclopedia) Deaton, Angus Stewart, 1945–, British-American economist, b. Edinburgh, Scotland, Ph.D Cambridge, 1974. He was a professor of econometrics at the Univ. of Bristol, England, from 1976…

Social Security Contribution and Rate Schedule

(percent of covered earnings)Year Retirement survivors,and disability insurance Hospital insurance (%)TotalEmployers and Employees 1978 4.95% 1.10% 6.05%1979–80 5.08 1.05 6.131981 5.35 1.30 6…

Live Births and Birth Rates, by Year

The following table shows the number of live births and the birth rate in the United States between 1910 and 2005. Year Births1 Rate2 1910 2,777,000 30.1 1915 2,965,000 29.5…

Teen Birth Rates, 1980–2012

According to the Center for Disease Control's National Center for Health Statistics, the birth rate for teenagers aged 15–19 dropped 6% from 2011 to 2012, to 29.4 per 1,000—the lowest rate ever…

Infant Mortality Rates, 1950–2010

The following table lists the infant mortality rates in the United States from 1950 to 2010, according to year, race, and gestation period. Year Deaths…