Volume 15, Issue 2 -

This study contributes to the modern literature on the economics of crime by proposing and solving two models of a differential game that considers the dynamic strategic behavior of two gangs engaged in a territorial conflict. The police force acts as the leader in the game. In the first model, each gang is concerned solely by the actions of the other, thus leading to an equilibrium wherein the greater one gang’s criminal activity, the greater the rival gang’s criminal activity. In the second model both gangs account primarily for police activities aimed at maintaining law and order, thus leading to an equilibrium wherein the gangs respond directly to the law enforcement activities of the police force. Exploratory analyses employing gang-related crime and police activities in Los Angeles provide empirical support for the main features of both models of the differential game, such as how gang rivalry fuels criminal activity and how the role of police is crucial in reducing gang-related crime.

Existing literature suggests that the sharing of firm-specific information related to costs of production among Cournot competitors unambiguously reduces consumer welfare. This article shows that this result does not hold when at least one firm is risk-averse. Perhaps more importantly, if consumers are sufficiently risk-averse allowing information sharing leads to a Pareto improvement.

We conduct an experimental analysis of pretrial bargaining, while allowing for the costly disclosure of private information in a signaling game. Under the theory, 100 % of plaintiffs with a weak case are predicted to remain silent, while 100 % of the plaintiffs with a strong case are predicted to voluntarily disclose their type. We find that 75 % of weak plaintiffs remain silent and 67 % of strong plaintiffs reveal their type. In line with theory, weak plaintiffs who reveal their type receive a lower payoff, while strong plaintiffs who reveal their type receive a higher payoff. Plaintiffs with a strong case who reveal their type have a dispute rate which is 50 % points lower than strong plaintiffs who remain silent. Because plaintiffs who reveal their type cannot extract the entire surplus from settlement from the defendant, the incentive to engage in voluntary disclosure is weaker empirically than it is in theory.

Departing from the observation that neutral experts are increasingly appointed by courts, this paper investigates the incentives of courts to appoint experts, and the interactions between the judge’s and the expert’s efforts to discover the truth about a given case. Judges seek to make correct decisions and may choose to appoint experts in order to do so. Experts are assumed to be guided by both reputational and truth-finding motives. We highlight the determinants of the judge’s and the expert’s effort levels and of the judge’s decision whether to appoint an expert. We find that the expert’s effort is decreasing in the judge’s effort, which implies potential freeriding from the judge. Moreover, we find that (i) the judge’s effort is generally suboptimal, and (ii) they might resort to an expert appraisal too frequently, thereby contributing to increased court congestion and higher costs for society. Our results therefore suggest that, under conditions that we discuss, it may be socially beneficial to apply a principle of proportionality to the use of expert testimony, depending on the complexity of the case.

How to enhance the maintenance, repair and improvement of condo buildings? We address this issue by focusing on the case of an elevator installation whose benefits are not uniform across units. We examine the link between majority approval and cost sharing. Relying on a cooperative game theory approach, we prove the coalitional stability of any cost allocation which is such that the unit shares are a non-decreasing function of the floor level. Second, we show that the two surplus allocations induced, respectively, by the de facto cost-sharing rule used in France and the equal cost-sharing rule may fail to be coalitionally stable. By insisting that the cost sharing must depend on the relative individual advantages provided by an improvement, French law increases the risk of disputes between neighbors, compared to other sharing rules.

We examine a two-stage litigation in which risk-averse litigants set contingent fees strategically for risk-neutral lawyers. In the first stage of the litigation, each litigant sets a fixed fee and a contingent fee for his lawyer. In the second stage, each lawyer exerts effort to win a lawsuit on behalf of the litigant. Employing the subgame-perfect equilibrium as a solution concept, we obtain the following results. First, if a litigant sets a higher rate of contingent fee, then the opponent follows suit and the contingent fee fraction increases in the difference in litigant’s utility between winning and losing the case. Second, changes in a litigant’s initial endowment have different effects on the contingent fee fraction depending upon litigant preferences, while an increase in the prize of the case always increases the contingent fee fraction regardless of litigant preferences.