A model-free methodology is used for the first time to estimate a daily volatility index (VIBEX-NEW) for the Spanish financial market.We use a public data set of daily option prices to compute this index and showthat daily changes in VIBEXNEW display a negative, tight contemporaneous...

Action-Set games are transferable utility games where the set of players is finite, every player has a finite set of actions, and the worth of the game is a function of the actions taken by the players. In this setting a rule has to determine individual payoffs at each combinations of actions....

Purpose – The aim of this paper is to analyze the compatibility between entrepreneurial and social attitudes. Specifically, it seeks to analyze whether subjects with a more developed economic entrepreneurial attitude exhibit a less social attitude. Design/methodology/approach – The...

This paper studies implementation of cooperative payoffs in finitely repeated games when players implement their strategies by finite automata of big sizes. Specifically, we analyze how much we have to depart from fully rational behavior to achieve the Folk Theorem payoffs, i.e., which are the...

This paper examines retailers' strategic decisions about store brand introduction when each retailer can stock a limited number of brands. The different product line mix equilibria depend on demand parameters that measure the cross-effect across national and store brands and the cross-effect...

The main contribution of this paper is to present a new procedure to reach cooperation through pseudorandom schemes in the finitely repeated Prisoner's Dilemma game, when strategies are implemented by automata. The equilibrium path consists of a communication process followed by a coordinated...

This paper deals with price competition among multiproduct firms. We consider a model with n firms and one representative buyer. Each firm produces a set of products that can be different or identical to the other firms' products. The buyer is characterized by her willingness to pay -in monetary...