A family of core extensions for cooperative TU-games is introduced. These solution concepts are non-empty when applied to non-balanced games yet coincide with the core whenever the core is non-empty. The extensions suggest how an exogenous regulator can sustain a stable and efficient outcome,...

We study mutual-aid games in which individuals choose to contribute to an informal mutual insurance pool. Individual coverage is determined by the aggregate level of contributions and a sharing rule. We analyze theoretically and experimentally the (ex ante) efficiency of equal and...

There is a general class of model used to examine the expenditure and tax strategies adopted towards mobile factors by states that are members of regional unions (eg., federations, confederations or common markets). We develop a variant of this model, extended to allow for imperfect factor...

Malicious activity in cyberspace comprises numerous forms, often resulting in significant consequences for the victims. According to the actual circumstances, a number of measures can be considered in response to such cases. In order to bring the perpetrators to justice, it is necessary to...

Who gets elected to political office? The negative selection hypothesis posits that the inherently dishonest run for office, expecting to earn political rent. Alternatively, the positive selection hypothesis suggests that individuals join politics to make a difference. Developing country...

Using a dictator game experiment, we examine whether the introduction of group identities affects giving. Group identities can activate feelings of in-group love and out-group hate to create an in-group bias. In addition, group identities may spawn social sanctions that are designed to reinforce...

The power to take game is a simple two player game where players arerandomly divided into pairs consisting of a take authority and responder.Both players in each pair have earned an own income in an individual realeffort decision-making experiment preceding the take game. The gameconsists of two...

Although reciprocity is a key concept in the social sciences, it is still unclear why people engage in costly reciprocation. In this study, physiological and self-report measures were employed to investigate the role of emotions, using the Power-to-Take Game. In this 2-person game, player 1 can...

We present a model of neighborhood effects in wage payment delays. Positive feedback arises because each employer?s arrears affect the late payment costs faced by other firms in the same local labor market, resulting in a strategic complementarity in the practice. The model is estimated on panel...

Veto institutions are often dominated by government opponents with rival electoral and policy interests (e.g. \divided government"). I investigate the tradeoff between policy control and policy blockade when both the government and the veto party may cater to opposing special interests. The...