Economist surveys professions of political leaders in different countries There was a lawyer, an engineer and a politician... and an
interesting comment by Stephen Morris.
Rajib in Which nationalities are trusting says:
"Reading Dan Ariely's Predictably Irrational I was struck and concerned by his data which suggested that once social norms of reciprocity break down it is difficult to regenerate them. In other words, social capital can be thought of as a limited nonrenewable resource, at least proximately." and posts data from World Values Survey responses from different countries on whether most people can be trusted.
Acemoglu and colloborators on the role of institutions in development via Chris Blattman's post The secret to development Fetchez la vache.