Tag Archives: Population density

The Behavioral Sink: A Fable For Our Times, by Hardscrabble Farmer

Is humanity the subject of a giant human-scale experiment equivalent to a famous one done on rats in the 1950s and 1960s. There are definitely some similarities. From Hardscrabble Farmer at theburningplatform.com:

Not long after the last of the last American soldiers returned home at the close of WWII, a little-known ethologist named John B. Calhoun set up a quarter acre pen somewhere on the outskirts of Rockville, Maryland and populated it with several dozen Norwegian rats. His experiment was meant to see just how large the population density would become if they were provided with adequate food, water, shelter and protection from predators so that all of their needs were met. Fellow researchers dubbed his experiment rat utopia and before long he had discovered the answer to his question.

When his research caught the eye of bureaucrats at the National Institute for Mental Health, they approached him with an offer of unlimited funding for another project along the same lines under stricter conditions than the bucolic environs of a pasture just north of Washington, D.C. By 1954 he had devised a complex interior setup for his rats to inhabit that divided the environment into four cells, each configured to provide a continuous supply of food, water and bedding with plenty of space for nests and open areas for social interaction. Into each of these he placed an equal number of both male and female rats and simply watched as they began to at first explore and then to colonize and dominate their surroundings.

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Dealing with the pandemic is not entirely rocket science, by Charles Murray

A somewhat different take on the coronavirus pandemic. From Charles Murray at aei.org:

The pandemic is complicated. Deciding on good policy is complicated. But a basic aspect of the American experience is not complicated and ought to be decisively affecting policy: the relationship of population density to the spread of the coronavirus. The relationship means that a great deal of the discussion about why some cities are doing worse than others is beside the point. These analyses may satisfy a natural urge to assign blame, and some of them surely have merit, but the role of one underlying demographic variable, population density, is immune to manipulation by the smartest policy.

Population density refers to the number of people per square mile. In this discussion, I’m going to use the county as the unit of analysis, based on the most recent census data. The data on reported coronavirus rates come from the database assembled by The New York Times and available online.

A few examples will illustrate what various population densities signify. Rural counties with a county seat of 15,000 or 20,000 typically have population densities of fewer than 100 per square mile. Counties with substantial agriculture but a small city of, say, 50,000 people, typically have population densities of several hundred per square mile but fewer than 1,000. To have an entire county show a population density of 1,000 or more requires considerable urbanization. When a county reaches a population density of 2,000 or more, it is almost always a clearly urban county. Counties that pass the 3,000 mark are almost always part of one of the densest metropolitan areas in the nation.

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