In a two-period model with uncertainty about life expectancy, we analyze several measures which are typically included in a social security reform: tax incentives for private life annuities, a cut in the social security benefits and an increase in the social security tax. First, we look at the demand side and study the effects on old-age provision for a given annuity price. It is shown that tax...

We consider a game theoretic framework to analyze traffic in a congested network, where a profit-maximizing monopolist sets prices for different routes. Each link in the network is associated with a flow-dependent latency function which specifies the time needed to traverse the link given its congestion. Users have utility functions defined over the amount of data flow transmitted, the delays t...

We consider a game theoretic framework to analyze traffic in a congested network, where a profit-maximizing monopolist sets prices for different routes. Each link in the network is associated with a flow-dependent latency function which specifies the time needed to traverse the link given its congestion. Users have utility functions defined over the amount of data flow transmitted, the delays t...