There is one central fact about the economic history of the twentieth century: above all, the century just past has been the century of increasing material wealth and economic productivity. No previous era and no previous economy has seen material wealth and productive potential grow at such a...

The history of the twentieth century can be summarized excessively briefly in five propositions: First, that the history of the twentieth century was overwhelmingly economic history. Second, that the twentieth century saw the material wealth of humankind explode beyond all previous imagining....

We present a simple overlapping generations model of an asset market in which irrational noise traders with erroneous stochastic beliefs both affect prices and earn higher expected returns. The unpredictability of noise traders' beliefs creates a risk in the price of the asset that deters...