This paper exposes a formal model of the spiral of silence theory. It is based on game theoy. The game consists on three players: players 1 and two have two strategies, to speak (s) or not (~s); the third player is Nature, which decides whether players 1 and 2 agree in their opinion or not. If...

This paper proposes a new method to introduce coherent risk measures for risks with infinite expectation, such as those characterized by some Pareto distributions. Extensions of the conditional value at risk, the weighted conditional value at risk and other examples are given. Actuarial...

A new methodology to construct synthetic volatility derivatives is presented. The underlying asset price process is very general, since equity, commodities and interest rates are included. The focus is on volatility swaps and volatility swap options, but much more derivatives may be considered....