Risk aversion is one of the most commonly cited properties of human decision making (e.g., Kahneman & Tversky, 1979). This finding is at odds with traditional expected value theory, but not with more recent theories of rational choice (e.g., von Neumann & Morgenstern, 1944). Since Bernoulli?s...

I present and study an evolutionary model of immigration and culturaltransmission of social norms in a set-up where agents are repeatedly matchedto play a one-shot interaction prisoner´s dilemma. Matching can be non-randomdue to limited integration (or population viscosity). The latter refers...

When a central bank operates with multiple, non-nested models of the economy, generally no single policy rule will be optimal across within alternate models. In this context, Levin and Williams (2003) introduce the notion of fault tolerance of policy rules, that is, the performance of policy...