We define the canonical form of a cost spanning tree problem. The canonical form has the property that reducing the cost of any arc, the minimal cost of connecting agents to the source is also reduced. We argue that the canonical form is a relevant concept in this kind of problems and study a...

This paper examines existence of Markov equilibria in the class of dynamic political games (DPGs). DPGs are dynamic games in which political institutions are endogenously determined each period. The process of change is both recursive and instrumental: the rules for political aggregation at date...

The resolution of a conflict often has an impact which extends beyond the remits of the parties directly involved in the confrontation (e.g. labour negotiations in sectors of public interest, where a strike would impact on the public at large). Once this is recognised, models addressing...

Divided societies in the developing world experience wasteful struggles for power. We study the relationship between political stability and resources wasted in the struggle within a model of competitive power contests. The model of power contests is similar in structure to models describing...

This note draws upon ecological models to describe the structure and equilibrium conditions of a generalized economic canopy consisting of three interactive economies assumed to be in competitive epiphytic, parasitic, and host relationships to each other. The maintained hypothesis is that...

We investigate the causes of civil war, using a new data set of wars during 1960-99. We test a `greed’ theory focusing on the ability to finance rebellion, against a`grievance’ theory focusing on ethnic and religious divisions, political repression and inequality. We find that greed...

We examine how globalization affects trade patterns and welfare when conflict prevails domestically. We do so in a simple model of trade, in which a natural resource like oil is contested by competing groups using real resources ('guns'). Thus, conflict is viewed as ultimately stemming from...

This paper presents the results of an experiment performed to test the properties of an innovative bargaining mechanism (called automated negotiation) used to resolve disputes arising from Internet-based transactions. Automated negotiation is an online sealed-bid process in which an automated...

The article aims at suggesting possible conjectures on Al-Qaeda's logic and structure. Even if the organization's secrecy makes any empirical evidence difficult to find, some insight can be provided by economic theory of contests: in this terms, Al-Qaeda can be acknowledged like an agent...

This paper considers a partial equilibrium model of conflict where two asymmetric, rational and risk-neutral opponents conflict in order to appropriate a positive fraction of a stake. An institutional constraint is modelled through an exogenously fixed element as a feature of a modified Contest...