I examine a Knightian (1921) model of risk using a general equilibrium model of investment and trade. A population of agents with various preference types can choose between a safe production technology and a risky production technology. In addition, the distribution of types of agents changes...

Although the General Agreement on Trade and Tariffs prohibits discriminatory import tariffs, GATT rules include means by which this prohibition can be circumvented. The previous literature use static models to show that discriminatory tariffs increase welfare. In a dynamic model, this is not...