Monthly Archives: March 2014

Heteropaternal Superfecundation

Sperm competition is a factor in some cases of paternal uncertainty, but there are also many cases in which it is not. For example, Daniel Boone’s wife had a daughter, Jemima, when he had been gone for more than a … Continue reading

Posted in Genetics | 124 Comments

Simple Mobility Models II

This is a sequel to the previous post exploring quantitative genetic models of income inequality motivated by the findings in Gregory Clark’s new book [1]. A simple quantitative genetic model must rely on the assumption of an underlying normal distribution … Continue reading

Posted in Uncategorized | Tagged , , | 37 Comments

Simple Mobility Models

Greg’s previous post reviewing Gregory Clark’s new book has generated some interesting discussion. Reviewers elsewhere and some of our customers have been surprised at the persistence of social class by surname and speculated that this implies genetic transmission of class. … Continue reading

Posted in Uncategorized | Tagged , , , , | 35 Comments

The Son Also Rises

Greg Clark has a new book out, The Son Also Rises. His thesis, in short, is that moxie has high heritability. Most studies show fairly high social mobility from one generation to the next – but Clark finds (using surname … Continue reading

Posted in Ashkenazi Jews, assortative mating, Book Reviews, Education, Genetics | 76 Comments

Burning Seed Corn

According to Sylvia Ann Hewlett, writing in the Harvard Business Review, 33% of successful career women (business executives, doctors, lawyers, academics,  etc) in the 41-55 age bracket are childless. In corporate America, 42%.  I figure that the TFR of this … Continue reading

Posted in dysgenics | 92 Comments

Assortive mating and income inequality

More than in the past, we have doctors marrying other doctors,  rather than nurses, basically because of an increase in assortative mating for education. Ceteris paribus, this would tend to cause greater income equality among families. Is it the main … Continue reading

Posted in assortative mating | Tagged | 53 Comments

Sperm competition

Mostly, people are talking about competition between sperm produced by different  males. In humans, this means women that are into speed dating. The non-paternity rate is an upper limit to the rate of sperm competition:  in many, probably most cases … Continue reading

Posted in Genetics | 145 Comments