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The city's population rose from about 5,000 in the 15th century to about 12,000 by 1800 and to above 60,000 by 1900, passing the 100,000 mark during the 1920s. Population peaked during the 1960s at 165,000, and has since decreased slightly, to below 130,000 by 2000. As of October 2015, the resident population stood at 140,634, of which 100,634 were Swiss citizens and 40,000 (30%) resident foreigners. A further estimated 350,000 people live in the immediate urban agglomeration.

What percent of the populatin of Bern resident foreigners?
Answer: 30%
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The theory that race is merely a social construct has been challenged by the findings of researchers at the Stanford University School of Medicine, published in the American Journal of Human Genetics as "Genetic Structure, Self-Identified Race/Ethnicity, and Confounding in Case-Control Association Studies". One of the researchers, Neil Risch, noted: "we looked at the correlation between genetic structure [based on microsatellite markers] versus self-description, we found 99.9% concordance between the two. We actually had a higher discordance rate between self-reported sex and markers on the X chromosome! So you could argue that sex is also a problematic category. And there are differences between sex and gender; self-identification may not be correlated with biology perfectly. And there is sexism."

What may self-identification not correlate with precisely?
Answer: biology
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Hayek is widely recognised for having introduced the time dimension to the equilibrium construction and for his key role in helping inspire the fields of growth theory, information economics, and the theory of spontaneous order. The "informal" economics presented in Milton Friedman's massively influential popular work Free to Choose (1980), is explicitly Hayekian in its account of the price system as a system for transmitting and co-ordinating knowledge. This can be explained by the fact that Friedman taught Hayek's famous paper "The Use of Knowledge in Society" (1945) in his graduate seminars.

Whose 1980 book mentions "informal" economics?
Answer:
Milton Friedman's