Lecture @ Szeged

The mindmap from Mario Paolucci’s invited lecture in David Hales’ doctoral course in Sezged is downloadable on the xmind website.

Luis Gustavo Nardin wins the best student paper award at SSC 2014

We are delighted to announce that Luis Gustavo Nardin has obtained the “best student paper award at SSC 2014” with the paper From Anarchy to Monopoly: How Competition and Protection Shaped Mafia’s Behavior

On Agent-Based Modelling and Computational Social Science

We’re glad to announce a new paper from LABSS as a contribution to the debate on the approach to computational social science: On Agent-Based Modelling and Computational Social Science.

In the first part of the paper, the field of Agent-Based Modelling is discussed focusing on the role of generative theories, aiming at explaining phenomena by growing them. After a brief analysis of the major strengths of the field some crucial weaknesses are analysed. In particular, the generative power of ABM is found to have been underexploited, as the pressure for simple recipes has prevailed and shadowed the application of rich cognitive models. In the second part of the paper, the renewal of interest for Computational Social Science is focused upon, and several of its variants, such as deductive, generative, and complex CSS, are identified and described. In the concluding remarks, an interdisciplinary variant, which takes after ABM, reconciling it with the quantitative one, is proposed as a fundamental requirement for a new program of the CSS.

doi: 10.3389/fpsyg.2014.00668

Mechanism change in a simulation of peer review: from junk support to elitism

New paper on peer review from LABSS and UniValencia: Mechanism change in a simulation of peer review: from junk support to elitism.

Our honest, totally unbiased, objective evaluation of this work is: reading it will change your life. You will sleep better. A sense of clarity will ensue. The pictures will spring up your imagination. The only paper you really need to read this year.

Ahem. Well maybe we’re a little bit overplaying it. Ok, here’s the abstract:

Peer review works as the hinge of the scientific process, mediating between research and the awareness/acceptance of its results. While it might seem obvious that science would regulate itself scientifically, the consensus on peer review is eroding; a deeper understanding of its workings and potential alternatives is sorely needed. Employing a theoretical approach supported by agent-based simulation, we examined computational models of peer review, performing what we propose to call redesign, that is, the replication of simulations using different mechanisms. Here, we show that we are able to obtain the high sensitivity to rational cheating that is present in literature. In addition, we also show how this result appears to be fragile against small variations in mechanisms. Therefore, we argue that exploration of the parameter space is not enough if we want to support theoretical statements with simulation, and that exploration at the level of mechanisms is needed. These findings also support prudence in the application of simulation results based on single mechanisms, and endorse the use of complex agent platforms that encourage experimentation of diverse mechanisms.

DOI 10.1007/s11192-014-1239-1

Obbedire o no, ce lo dicono le norme / Obey or not, norms tell us

We are glad to point at the special issue of CNR “Almanacco della Scienza” on the winners of the Ricercat@mente prize : in particular our Giulia Andrighetto with her research on norms (in Italian).

New paper published: The Norm-Signaling Effects of Group Punishment: Combining Agent-Based Simulation and Laboratory Experiments

Daniel Villatoro, Giulia Andrighetto, Jordi Brandts, Luis Gustavo Nardin, Jordi Sabater-Mir, and Rosaria Conte: The Norm-Signaling Effects of Group Punishment: Combining Agent-Based Simulation and Laboratory Experiments Social Science Computer Review 0894439313511396, first published on December 11, 2013


Punishment plays a crucial role in favoring and maintaining social order. Recent studies emphasize the effect of the norm-signaling function of punishment. However, very little attention has been paid so far to the potential of group punishment. We claim that when inflicted by an entire group, the recipient of punishment views it as expressing norms. The experiments performed in this work provide evidence that humans are motivated not only by material incentives that punishment imposes but also by normative information that it conveys. The same material incentive has a different effect on the individuals’ future compliance depending on the way it is implemented, having a stronger effect when it also conveys normative information. We put forward the hypothesis that by inflicting equal material incentives, group punishment is more effective in enhancing compliance than uncoordinated punishment, because it takes advantage of the norm-signaling function of punishment. In support of our hypothesis, we present cross-methodological data, that is, data obtained through agent-based simulation and laboratory experiments with human subjects. The combination of these two methods allows us to provide an explanation for the proximate mechanisms generating the cooperative behavior observed in the laboratory experiment.

aCrossSocial seminar: F. Giardini on reputation and cooperation

In the cycle of the aCrossSocial seminars, we announce for Jan. 22 Francesca Giardini:

What goes around comes around: How reputation can support cooperation in natural and artificial societies.

Discussant: Laura BARCA

Minding norms: the presentation

il 13 gennaio 2014, ore 17, presso la Sala delle Colonne dell’Università LUISS, Via Pola 12, Roma, si terrà la presentazione del libro Minding Norms. Mechanisms and Dynamics of Social Order in Agent Societies.

“Norms are prescribed conducts applied by the majority of
people. Getting across cultures and centuries, norms
evolved to rule all human relationships, from the most
formal to the most intimate. Impinging on any sphere of
life, from religious to political, norms affect social, moral,
and even aesthetical behaviours. They are enforced
through centralized sanctions or distributed control, and
originate through deliberate acts of issuing or from spon-
taneous interaction in informal settings. Despite ubiquity
and universality, norms are still awaiting for a general
comprehensive theory, simultaneously doing justice to
three intuitions: that, under variable contents, norms cor-
respond to a common notion; that, once brought about,
norms feedback on their producers, affecting their con-
ducts; and finally that before and in order to drive the
behaviours of individuals, norms must affect their beliefs
and goals: people must detect and accept norms before
converting them into observable behaviours.”

Giulia Andrighetto wins the Ricercat@mente Prize

Giulia Andrighetto has been awarded the Ricercat@mente Prize!

Jointly sponsored by the Consiglio Nazionale delle Ricerche and the Accademia Nazionale dei Lincei, the prize is for the best researcher under the age of 35 in the field of Humanities, Social Sciences and Cultural Knowledge. It aims to give young researchers greater visibility and promote talent and excellence in Italian Science.

Andrighetto received her award at a ceremony on 18 Novemeber, at the headquarters of the Consiglio Nazionale delle Ricerche in Rome.

Reputation to understand society

The introduction to the CMOT special issue with papers from ICORE 2011 is out! Yay!

Read the introduction here

This is how it starts:

Reputation is commonly defined as “the beliefs or opinions that are generally held about someone” . As such, reputation is the prototypical representative of social artifacts that we use to make sense out of social complexity. It shares with norms, responsibility, power, and trust – to cite our own favorite examples – the characteristic of making sense only in a social context. Reputation places itself in the most abstract position among these social artifacts.
Why is it so? Because when properly defined, reputation loosely connects with the object-level actions of the individual. First, in order to distinguish reputation in the proper sense, one must refer to some kind of majority rule – since it must be “generally held”. Second, reputation needs a model where the agent that elaborates and reasons on it must be endowed with a mind able to hold different levels of beliefs, since this agent must not confuse reputation with experience or evaluation. Third, while norms, power, trust and responsibility have all more or less direct connection to an action at the object level – violate or punish, exert, perform an uncertain transaction, gain attribute for an event – reputation only connects directly with the action of gossiping.


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