The effect of trade liberalization on the spatial concentration of economic activities is not straightforward. It has, on the one hand been widely argued that protectionism increase spatial concentration when firms locate close to the main domestic markets, but it has also been argued that trade...

Experiments in psychology, where subjects estimate confidence intervals to a series of factual questions, have shown that individuals report far too narrow intervals. This has been interpreted as evidence of overconfidence in the preciseness of knowledge, a potentially serious violation of the...