demographic change
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The nineteenth century, above all in Europe, was the age of the 'demographic transition', from high birth and death-rates to low ones; people's health improved, they lived longer, the devastating visitations of epidemics like smallpox, typhoid and cholera gradually disappeared. This lecture explores the reasons for this change, and looks at its effects on culture and society, attitudes towards death and suffering, disease, debilitation an...more
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Prior to the Demographic Transition, fertility in northwestern Europe was controlled by limiting marriage. Marriage was regulated by landowners and the churches, and was not allowed unless a man had accumulated the resources necessary to support a family. Long periods of being landless, a servant, or an apprentice, precluded marriage. Once married, there was no control of fertility. But, only about half of adults were married at any given ...more
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Genetics controls evolution. There are four major genetic systems, which are combinations of sexual/asexual and haploid/diploid. In all genetic systems, adaptive genetic change tends to start out slow, accelerate in the middle, and occur slowly at the end. Asexual haploids can change the fastest, while sexual diploids usually change the slowest. Gene frequencies in large populations only change if the population undergoes selection.
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Khosla never intended to be a venture capitalist and still doesn't consider himself as one. He considers himself a venture assistant who has little interest in business other than its necessity for economics and its power to change the world. Khosla loves technology and believes that it drives most of the change that happen in the world.
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William Sahlman, professor at Harvard Business School, observes that almost all entrepreneurs and their ventures must inevitably change and adapt. In all the business plans Salhman has seen, he says that almost every single business has had to change as they discover their customers, their market, etc. So the key to successful entrepreneurship is anticipating and dealing with change.
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Fiorina talks about the dynamics of change and fear. She notes that entrepreneurship is about risk-taking, and this is always associated with trying something new. Fiorina concludes by asserting that change involves gathering enough energy and force to overcome the power of status quo.
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Smith explains that a theory of change in the social sector is roughly equivalent to a combination of the business model and strategy in the for-profit world. You need to identify a change and have a hypothesis about how to make it happen, she says. This is more complex in the social sector because, in additional to market forces, you have to deal with regulatory forces, emotional forces, social forces, and political forces, she adds. A se...more
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Using derivatives to solve rate-of-change problems.
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Another (simpler) example of using the chain rule to determine rates-of-change.
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Tim Draper, Partner at Draper Fisher Jurvetson, argues that the pace of technical change and adoption is increasing. This increasing rate of change is driven both by a growing customer base connected to the Internet as well as the growing number of entrepreneurs who are able to participate in global markets from anywhere in the world.
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Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions.
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Using AuctionDrop as an example, Adams explains why it's extremely hard to change consumer development.
