population pressure
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European populations grew only slowly during the period 1200-1700; factors include disease and wars. Human feces and rotting animal remains were not sequestered and often contaminated drinking water. Cities were so filthy that more people died in them than were born. About a third of children died in infancy, many from abandonment and lack of care during wet-nursing. Children that survived were subjected to harsh discipline to control thei...more
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In this lecture, we use the overlapping generations model from the previous class to see, mathematically, how demographic changes can influence interest rates and asset prices. We evaluate Tobin's statement that a perpetually growing population could solve the Social Security problem, and resolve, in a surprising way, a classical argument about the link between birth rates and the level of the stock market. Lastly, we finish by laying some...more
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The transparent tissues of the eye allow light to reach the retina. This highly metabolic tissue requires oxygen delivered by the blood vessels, which are damaged by disease. Diabetic retinopathy is the commonest cause of blindness in the working-age population and in later life hypertension adds to this toll. The eyes maybe the mirror of the soul, but they certainly are a window into our general health. This lecture traces the story f...more
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August 9, 2007 presentation by Russ Altman for the Stanford University Office of Science Outreach's Summer Science Lecture Series. There are a number of causes for variation in drug response across the population, but differences in genetics are an important factor. Russ Altman, Professor & Chair of Bioengineering and Professor of Genetics and Medicine, discusses how variations in genetics can alter the "typical" response as well as touch...more
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Early Modern England: Politics, Religion, and Society under the Tudors and Stuarts (HIST 251)Professor Wrightson traces the major economic expansion of the late sixteenth and early seventeenth centuries. Despite occasional crises of mortality, population levels rose steadily, particularly in urban areas. Increased population levels resulted in enhanced agricultural and industrial output. Professor Wrightson reviews the extension of the cul...more
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1) Population in China: Until recently, Chinese families did not much alter their fertility depending on life events such as deaths of children. However, under government prodding and eventually coercion, fertility dropped drastically in China in the 1970s, but to counteract momentum, the One-Child Policy started in 1979-80. 2) Population Growth and Economic Development: In Asia, rapid fertility drops have preceded economic booms by approx...more
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Early Modern England: Politics, Religion, and Society under the Tudors and Stuarts (HIST 251)Professor Wrightson begins by assessing the state of education in the late medieval period and then discusses the two cultural forces (Renaissance humanism and the Reformation) which lay behind the educational expansion of the sixteenth and seventeenth centuries. While there were distinct hierarchies of learning in the period (with women and the lo...more
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Early Modern England: Politics, Religion, and Society under the Tudors and Stuarts (HIST 251)Professor Wrightson discusses the remarkable growth of the British economy in the late seventeenth and early eighteenth centuries. He examines the changed context of stable population and prices; regional agricultural specialization; urbanization; the expansion of overseas trade both with traditional European trading partners and with the Americas ...more
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The economic concept of game theory can be readily applied to evolution and behavior. By analyzing encounters between organisms as a mathematical "game," important information such as fitness payoffs and the proportions of "strategies" played by each group within a population can be inferred. While oftentimes these games are too simplified to apply directly to actual examples in nature, they are still useful models that help convey importa...more
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We apply the idea of evolutionary stability to consider the evolution of social conventions. Then we consider games that involve aggressive (Hawk) and passive (Dove) strategies, finding that sometimes, evolutionary populations are mixed. We discuss how such games can help us to predict how behavior might vary across settings. Finally, we consider a game in which there is no evolutionary stable population and discuss an example from nature.
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While Nazi Germany's crimes were unprecedented, Adolf Hitler himself was in many respects a typical figure. An idle youth, of seemingly mediocre talents, his political career and passionate hatreds were formed by the experience of World War I. The rise of fascism in Germany, as elsewhere, must be understood in the context of a postwar climate of resentment and instability. Germany's economic crisis, in particular, led the middle classes to...more
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In East and South Asia there are many more boys than girls. Previously, this resulted from female infanticide, now it is sex-selective abortion. In those cultures, girls generally marry out of the family as teenagers and thus provide no benefit for the family that raised them. Bangla Desh is agriculturally very rich, but its population is so dense that per capita income is one of the lowest in Asia. Despite the poverty, an excellent family...more
