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Globalization of trade and finance has gone a long way over the last half-century. But it is less impressive than most non-economists think, judged either by the standard of 100 years ago or by the hypothetical standard of perfect international integration. The paper documents the extent of globalization, and some reasons for the barriers that remains. It(More)
The lead concentration in bone and tooth has been determined in 105 well-preserved Nubian skeletons from the period 3300 B.C. - 750 A.D., as well as in 17 individuals from present-day Denmark. The analyses were performed blind in two different laboratories, and the results were in close agreement. Compared to contemporary lead levels in Denmark, the oldest(More)
Lead storage in teeth was evaluated by examining the lead concentration in deciduous teeth of 32 children whose habits of pica and state of lead exposure had been studied when they were between 1 and 3 years of age. Concentratios of lead in their teeth depended on the reported amount of paint or plaster intake and the duration of exposure. The mean dental(More)
The Welch Allyn AudioScope is a new screening instrument that allows both audiometric testing at 500, 1000, 2000, and 4000 Hz at 25 dB hearing level and otoscopic examination. Sixty-eight patients between 3 and 9 years of age with normal hearing or a variety of hearing losses comprised the study population. Immediately after receiving an audiologic(More)