Developing a model in which heterogeneity arises among two groups of fundamentalists that follow gurus, we focus on the dynamic effects of increasing heterogeneity. We show that an increasing degree of heterogeneity leads firstly (i) to insurgence of a pitchfork bifurcation and, secondly (ii)...

Nel presente lavoro abbiamo costruito un modello di determinazione del tasso di cambio in presenza di agenti eterogenei (Banca Centrale, Investitori e Market Makers). Ampie fluttuazioni del tasso di cambio sono il risultato di dinamica endogena, in particolare scaturiscono dall’interazione...

Developing a model with a switching mechanism, we show how complex dynamics can be generated even though heterogeneity arises among agents with the same trading rules (fundamentalists). We assume that there are two experts which are imitated by other operators. We show that (i) market...

In this note, we propose a model where a quantity setting monopolist has incomplete knowledge of the demand function. In each period, the firm sets the quantity produced observing only the selling price and the slope of the demand curve at that quantity. Given this information and through a...

This paper analyzes how the interaction between green consumers and responsible firms affects the market equilibrium. The main result is that a higher responsibility by both producers and consumers can have different impacts on the efficiency of the firms' abatement activity, depending on the...

In his seminal paper, starting from the premise that productivity is heterogeneous across firms, Melitz (2003) nicely accounts for the stylized fact that the level of individual productivity is key in determining the capability of a firm to export. In this paper we build a model along Melitz's...

Starting from the premise that productivity is heterogeneous across firms, Melitz (2003) explains why individual productivity is key in determining the capability of a firm to export. In this paper we build a model along Melitz’s lines to show that also financial capacity, captured by the...