Many lives in many worlds

I argue that accepting quantum mechanics to be universally true means that you should also believe in parallel universes. I give my assessment of Everett's theory as it celebrates its 50th anniversary.Comment: Nature version with better graphics at http://www.nature.com/nature/journal/v448/n7149/full/448023a.html Everett bio and other links at http://space.mit.edu/home/tegmark/quantum.htm

Modulation of the cytosolic androgen receptor in striated muscle by sex steroids

The influence of orchiectomy (GDX) and steroid administration on the level of the cytosolic androgen receptor in the rat levator ani muscle and in rat skeletal muscles (tibialis anterior and extensor digitorum longus) was studied. Androgen receptor binding to muscle cytosol was measured using H-3 methyltrienolone (R1881) as ligand, 100 fold molar excess unlabeled R1881 to assess nonspecific binding, and 500 fold molar excess of triamcinolone acetonide to prevent binding to glucocorticoid and progestin receptors. Results demonstrate that modification of the levels of sex steroids can alter the content of androgen receptors of rat striated muscle. Data suggest that: (1) cytosolic androgen receptor levels increase after orchiectomy in both levator ani muscle and skeletal muscle; (2) the acute increase in receptor levels is blocked by an inhibitor of protein synthesis; and (3) administration of estradiol-17 beta to castrated animals increases receptor binding in levator ani muscle but not in skeletal muscle

Another look at part-time employment

A study that disputes recent reports claiming that undesirable and low-paying part-time jobs are overtaking full-time work, explaining how these reports overlook expansion in the labor force, confuse establishment and household data, and disregard differences in worker characteristics that can obscure relative wages.Employment (Economic theory)

Sectoral wage convergence: a nonparametric distributional analysis

An examination of the relative shapes of the wage distribution in the U.S. goods-producing and service-producing sectors that uses a nonparametric measure of density overlap to analyze wage differences between the two sectors over time. ; What implications do 21st century monetary innovations bring for holdings of central bank money and standards of value? Emerging technologies such as cybercash, e-cash, and smart cards can be expected to reduce demand for central bank money, but the theoretical framework for monetary policy has not changed.Manufactures ; Service industries ; Wages

Sectoral wage convergence: a nonparametric distributional analysis

A nonparametric analysis of the similarity between goods and services wage densities, applying kernel density estimates and an overlap statistic to U.S. weekly full-time wages from 1969 to 1993.Manufactures ; Service industries ; Wages