Christopher X J. Jensen
Professor, Pratt Institute

More press for paper that de-bunks the zero determinant superiority

Posted 03 Sep 2013 / 0

There has been additional coverage of the paper showing that “zero determinant” strategies in the Prisoner’s Dilemma are not evolutionarily robust: Phys.org “Generosity leads to evolutionary success, biologists show” Popular Science “Evolution Punishes Selfish People, Game Theory Study Says” Here’s the original paper: Proceedings of the National Academy of Sciences USA “From extortion to generosity, evolution Read More

A Minor Post, Articles, Cooperation, Game Theory, Modeling (General), System Stability, Web

Cooperative child-rearing pays dividends for ruffed lemurs, irrespective of kinship

Posted 23 Aug 2013 / 0

Mongabay News “The evolution of cooperation: communal nests are best for ruffed lemurs” Behavioral Ecology and Sociobiology “Communal nesting, kinship, and maternal success in a social primate” What I find particularly interesting about these findings is that they appear to show that kinship — if a factor at all — might well be a byproduct Read More

A Minor Post, Articles, Behavioral Ecology, Cooperation, Kin Selection, Mating systems, Mutualism, Reciprocity, Reproductive Fitness, Tropical Forest, Web

National Geographic “The Short Happy Life of a Serengeti Lion”

Posted 23 Aug 2013 / 0

National Geographic “The Short Happy Life of a Serengeti Lion” This article provides a great overview of the kind of work that Craig Packer’s research group does in the Serengeti to understand the social behavior of lions. There is valuable information here on why lions are social (unlike other large cats), why lions must cooperate, Read More

A Minor Post, Articles, Behavior, Behavioral Ecology, Carrying Capacity, Cooperation, Grasslands, Kin Selection, Predation, Reciprocity

Zero determinant strategy is just another short-term adaptation

Posted 15 Aug 2013 / 0

The Scientist “A Twist in Evolutionary Game Theory: Biologists demonstrate the instability of employing a selfish strategy in the prisoner’s dilemma game” Nature Communications “Evolutionary instability of zero-determinant strategies demonstrates that winning is not everything” I am so glad to see that someone did the math and simulations to look at the long-term stability of Read More

A Minor Post, Adaptation, Articles, Behavior, Coevolution, Cooperation, Evolutionary Modeling, Game Theory, Individual-based Models, Phenotypic Plasticity, Punishment, Reciprocity, System Stability

New theory explaining the prevalence of homosexuality focuses on epigenetics

Posted 15 Jul 2013 / 0

The Quarterly Review of Biology “Homosexuality as a Consequence of Epigenetically Canalized Sexual Development” What makes this theory so compelling is how it addresses the “heritable but not at all clearly genetic” problem of explaining the very high prevalence of homosexuality in human populations. There have been other theories of homosexuality that invoke sexual antagonism, but Read More

A Minor Post, Articles, Epigenetics, Human Evolution, Sex and Reproduction

Quantifying the climate value of that 40-acre woodlot

Posted 07 Feb 2013 / 0

The New York Times “Tree Power“

A Minor Post, Articles, Climate Change, Closed Loop Systems, Public Policy, Quantitative Analysis, Sustainability, Temperate Rainforest

Green port policies yield big decreases in the ecological footprint of shipping

Posted 26 Jan 2013 / 0

National Geographic “California Ports Go Green” This is a nice infographic showing that changes in policy can have a big impact on the sustainability of commerce. It is amazing how much efficiency improvements can lower ecological impacts.

A Minor Post, Articles, Economics, Information Design, Public Policy, Sustainable Transportation

As the nature of university-level teaching changes, should we re-assess the credit hour?

Posted 26 Jan 2013 / 0

The Chronicle of Higher Education “The Curious Birth and Harmful Legacy of the Credit Hour” The Chronicle of Higher Education “In Defense of the Credit Hour“

A Minor Post, Articles, Higher Education

Brief NYT article on empathy in children

Posted 25 Jan 2013 / 0

The New York Times “Understanding How Children Develop Empathy“

A Minor Post, Altruism, Articles, Empathy

Is selective rejection of science really a problem?

Posted 18 Jan 2013 / 1

In a recent short opinion piece (Scientific American “Creation, Evolution and Indisputable Facts“), Jacob Tanenbaum argues that selectively rejecting evolutionary biology is dangerous to the scientific culture of America. He rightly points out that our populace does not reject science as a whole, but instead picks and chooses what science to doubt and what science Read More

A Major Post, Adaptation, Altruism, Articles, Belief, Cooperation, Evolution, Gene-Culture Coevolution, Human Evolution, Human Uniqueness, Religion, System Stability