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Allee Effect from Critical Transitions

Geoff McDonnell

Addition of Allee effect to Logistic Growth Insight 1540. From the Appendix of Marten Scheffer's 2009 Book Critical Transitions in Nature and Society p332 The Allee affect describes a threshold density (smaller than the carrying capacity K) below which populations go into free fall extinction.

Ecology Health Care

  • 7 years 12 months ago

Producing Health Consuming Health Care 5

Geoff McDonnell

From Evans RG and Stoddardt GL  1990 paper Soc Sci Med 31(12)1347-63 , also published in a book by Evans, Barer and Marmor, Why are some people healthy and others not?: The determinants of population health. We added impacts of spending and a "Thermostat" setting for population health controlling health spending. We now add another target for provider income and responses by providers to pressures to increase income with spending.

Health Care

  • 7 years 12 months ago

Seeing and Believing

Geoff McDonnell

"Seeing is believing" and "Believing is seeing". How the reduction of doubt can lead to holding on to initially helpful beliefs that later turn out to be false but are difficult to change. Or as I believe Bertram Russell might once have put it, "The trouble with the world is that fools are so sure of themselves and the wise are so uncertain."

A model of the ladder of inference which shows how we short circuit reality based on the beliefs we develop. A picture version of the parameter version of Insight 351 for an academic audience.

Health Care Ladder Inference Reality Basics

  • 7 years 12 months ago