We design a new field experiment to test pro-social behaviour: will a household return a letter that has been incorrectly addressed? On average, we find that half of all letters were returned. Return rates do not vary significantly according to the gender, race or ethnicity of the fictitious...

One of the most controversial aspects of Hayek's social theory was his acceptance of the concept of cultural group selection. The publication of Unto Others: The Evolution and Psychology of Unselfish Behavior provides an opportunity to revisit this much-maligned component of Hayek's thought....

One of the most controversial aspects of Hayek's social theory was his acceptance of the concept of cultural group selection. The publication of "Unto Others: The Evolution and Psychology of Unselfish Behavior" provides an opportunity to revisit this much-maligned component of Hayek's thought....