In a hub-and-spoke network, the profit function of an airline is supermodular with respect to the airline's own entry decisions for different city-pairs. This source of complementarity implies that a hub-and-spoke network can be an effective strategy for deterring the entry of competitors. This...

We find that from 1995 to 2002 in China, the dispersion of wealth decreased, the money wealth ratio increased for all wealth levels and the aggregate money-output ratio increased. We develop a two-asset dynamic general equilibrium model in which households face a portfolio adjustment cost and a...