Fresh ENP: Conventional contracts, intentional behavior and logit choice: equality without symmetry

go to link In a new paper in the Evolutionary Nash Program published in Games and Economic Behavior, Sung-Ha Hwang, Wooyoung Lim, Philip Neary and Jonathan Newton show how Buy Cialis With Dapoxetine Online egalitarianism can emerge in asymmetric environments.

go Specifically, when coordination games are played under the logit choice rule and there is intentional bias in agents’ non-best response behavior, the Order Priligy Online Usa Egalitarian bargaining solution emerges as the long run social norm. Without intentional bias, a new solution, the Logit bargaining solution emerges as the long run norm. These results contrast with results under non-payoff dependent deviations from best response behavior, where it has previously been shown that the Kalai–Smorodinsky and Nash bargaining solutions emerge as long run norms.

source link Experiments on human subjects, reported in the paper, suggest that non-best response play is Buy Amoxicillin And Clavulanate payoff dependent and displays intentional bias. This suggests the Egalitarian solution as the most likely candidate for a long run bargaining norm.

click Read the full paper here. Read more on the Evolutionary Nash Program on this site here.

Fresh SI: Agency Equilibrium

Buy Provigil Modafinil In a recent working paper, Jonathan Newton gives a fixed point solution concept that incorporates Order Cytotec collective agency under follow link incomplete information.

In keeping with the ethos of the SI project, Where Can I Buy Cytotec In Usa agency may be exercised by different entities (e.g. individuals, firms, households). A given individual can form part of multiple agents (e.g. he may belong to a firm and a household).

However, the set of agents that act in a given situation might not be Buy Priligy Online Usa common knowledge. For example, Provigil Drug Buy Online Alice may not know whether Bob and Colm have formed a coalition and constitute a collective agent.

The paper models such considerations, inspired by the classic model of incomplete information over preferences of Harsanyi.

Read the full paper here.

Fresh SI: Newton & Sercombe on agency, potential and contagion

In a recent working paper, Jonathan Newton and Damian Sercombe consider the relationship between the aggregation of incentives at the individual level (using the mathematical tool of a Buy Cheap Priligy Uk potential function) and the click aggregration of agency in decision making.

They find that the relationship between incentives and agency is related in striking ways to the payoffs of the underlying game they consider.

Results are proven by showing relationships between the pre-existing graph theoretic concepts of the close-knittedness and enter cohesion of sets of players whose interaction is mediated by a graph.

Read the full paper here.

Fresh SI: Newton on the evolution of collaboration

The ability to form shared intentions and adjust one’s choices in collaboration with others is a fundamental aspect of human nature.

In a recent publication in Games and Economic Behavior, Jonathan Newton discusses the forces that act for and against the evolution of this ability.

In contrast to altruism and other non-fitness maximizing preferences, for large classes of games the ability to form shared intentions and undertake collaborative activity proliferates when rare without requiring group selection or assortativity in matching.

Read the full paper here.

Fresh SI: Okada & Sawa on the implications of collective agency arising from majority voting

In a new working paper, Akira Okada and Ryoji Sawa examine an evolutionary model in which the policy followed by a collective is determined by majority (or supermajority) voting by Misoprostol Generic No Prescription individuals. They look at the kind of policies that emerge under given voting rules.

A voting rule can be considered a way of forming a collective intention. In fact, it can be a strong way of forming a collective intention as the wishes of individuals in a minority are disregarded. It follows that, in this sense, the weakest voting rule is the one that requires ALL individuals to agree: the unanimity voting rule.

Under the unanimity rule, the only way a new policy x can defeat a status quo policy Safe To Buy Provigil Online y is if every individual voting weakly prefers Can I Buy Cytotec At Walmart x to y. This is exactly the Coalitional Better Response rule found in Newton and Angus (2015, paper, video).

Okada and Sawa find that when their voting dynamic is perturbed uniformly, in the long run Condorcet winning  policies tend to emerge. When perturbations depend on payoffs (specifically, logit) Borda winning policies tend to emerge.

For more, see the paper.

Fresh SI: Nax and Perc on the replication of coalitionally beneficial behaviour by individual mistakes

In this paper published in Scientific Reports, Heinrich Nax and Matjaz Perc discuss naive learning in public goods games. They examine a situation in which simultaneous mistakes by multiple players can end up benefiting the mistake making players. For example, it could be the case that 3 players make mistakes and play a myopically suboptimal action, but that because they make mistakes simultaneously they gain payoff from these mistakes.

Hence, Can I Buy Cytotec Over The Counter profitable coalitional moves are replicated by the mistakes of individuals. To replicate coalitional moves by larger numbers of players will require a larger number of mistakes and so such moves will be relatively less likely. This is similar to the assumption made in Newton (2012, paper, web), although in the cited paper it is an assumption, whereas in Nax and Perc it emerges endogeneously as described above.

A Nash equilibrium is k-strong if there exists no profitable coalitional deviation for a coalition of any size up to and including k  (see the paper under discussion or Newton & Angus, 2013). The authors show that behaviour under naive learning depends on the k-strength of the equilibria in their model (i.e. on the value of for which equilibria are k-strong).

Read the full paper here.

Fresh SI: Newton, Wait & Angus on how shared intentions combine with organizational structure to influence corporate culture

Watercooler chat, organizational structure and corporate culture by Newton, Wait and Angus, just released as a working paper.

Buy Sildenafil Dapoxetine Abstract:
Modeling firms as networks of employees, occasional collaborative decision making around the office watercooler changes long run employee behavior (corporate culture). The culture that emerges in a given team of employees depends on team size and on how the team is connected to the wider firm. The implications of the model for organizational design are explored and related to empirical research on communication, innovation, the size and decision making of corporate boards and trends in the design of hierarchical structures.

Press for SI: The Evolution of SI on ABC Radio National – Afternoons

Simon Angus appeared today on ABC’s Radio National – Afternoons, hosted by Michael Mackenzie, to discuss joint work with Jonathan Newton recently published in PLoS Computational Biology (and featured on this site here).

The discussion mostly focused on the background to the paper — namely the Vygotskian intelligence hypothesis of Michael Tomasello and others, and his recent research that aims to illicit the key cognitive differences between human infants and related apes in settings in which the hall-marks of shared intentionality might be expected to arise.

You can download or listen to the discussion here.