Ángel Sánchez

ORCID: 0000-0003-1874-2881
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About
Contact & Profiles
Research Areas
  • Evolutionary Game Theory and Cooperation
  • Experimental Behavioral Economics Studies
  • Opinion Dynamics and Social Influence
  • Game Theory and Applications
  • Theoretical and Computational Physics
  • Nonlinear Photonic Systems
  • Evolution and Genetic Dynamics
  • Nonlinear Dynamics and Pattern Formation
  • Complex Network Analysis Techniques
  • Advanced Fiber Laser Technologies
  • Quantum and electron transport phenomena
  • Mathematical and Theoretical Epidemiology and Ecology Models
  • Evolutionary Psychology and Human Behavior
  • Nonlinear Waves and Solitons
  • Semiconductor Quantum Structures and Devices
  • Complex Systems and Time Series Analysis
  • Spectroscopy and Quantum Chemical Studies
  • stochastic dynamics and bifurcation
  • Stochastic processes and statistical mechanics
  • Advanced Thermodynamics and Statistical Mechanics
  • Social Capital and Networks
  • Quantum chaos and dynamical systems
  • Mental Health Research Topics
  • Material Dynamics and Properties
  • Economic theories and models

Universidad Carlos III de Madrid
2016-2025

Comunidad de Madrid
2024

Universidad de Zaragoza
2015-2024

Instituto Politécnico Nacional
2024

Center for Research and Advanced Studies of the National Polytechnic Institute
2024

Institute for Cross-Disciplinary Physics and Complex Systems
2004-2023

Government of Extremadura
2022

Unidades Centrales Científico-Técnicas
2022

Universidade Federal de Santa Maria
2022

Universidade Federal de Pelotas
2022

The increasing integration of technology into our lives has created unprecedented volumes data on society's everyday behaviour. Such opens up exciting new opportunities to work towards a quantitative understanding complex social systems, within the realms discipline known as Computational Social Science. Against background financial crises, riots and international epidemics, urgent need for greater comprehension complexity interconnected global society an ability apply such insights in...

10.1140/epjst/e2012-01697-8 article EN cc-by The European Physical Journal Special Topics 2012-11-01

It is not fully understood why we cooperate with strangers on a daily basis. In an increasingly global world, where interaction networks and relationships between individuals are becoming more complex, different hypotheses have been put forward to explain the foundations of human cooperation large scale account for true motivations that behind this phenomenon. context, population structure has suggested foster in social dilemmas, but theoretical studies mechanism yielded contradictory...

10.1073/pnas.1206681109 article EN Proceedings of the National Academy of Sciences 2012-07-06

We review theoretical approaches for modelling the origin, persistence and change of social norms. The most comprehensive models describe coevolution behaviours, personal, descriptive injunctive norms while considering influences various authorities accounting cognitive processes between-individual differences. Models show that can improve individual group well-being. Under some conditions though, deleterious persist in population through conformity, preference falsification pluralistic...

10.1098/rstb.2023.0027 article EN cc-by Philosophical Transactions of the Royal Society B Biological Sciences 2024-01-21

Background The evolutionary origin of cooperation among unrelated individuals remains a key unsolved issue across several disciplines. Prominent the mechanisms proposed to explain how can emerge is existence population structure that determines interactions individuals. Many models have explored analytically and by simulation effects such structure, particularly in framework Prisoner's Dilemma, but results these largely depend on details as type spatial or dynamics. Therefore, experimental...

10.1371/journal.pone.0013749 article EN cc-by PLoS ONE 2010-11-12

Spatial structure is known to have an impact on the evolution of cooperation, and so it has been intensively studied during recent years. Previous work shown relevance some features, such as synchronicity updating, clustering network, or influence update rule. This done, however, for concrete settings with particular games, networks, rules, consequence that contradictions arisen a general understanding these topics missing in broader context space 2x2 games. To address this issue, we...

10.1103/physreve.80.046106 article EN Physical Review E 2009-10-08

In spite of its relevance to the origin complex networks, interplay between form and function role during network formation remains largely unexplored. While recent studies introduce dynamics by considering rewiring processes a pre-existent network, we study growth proposing an evolutionary preferential attachment model, main feature being that capacity node attract new links depends on dynamical variable governed in turn interactions. As specific example, focus problem emergence cooperation...

10.1371/journal.pone.0002449 article EN cc-by PLoS ONE 2008-06-17

Evolutionary game theory has traditionally assumed that all individuals in a population interact with each other between reproduction events. We show eliminating this restriction by explicitly considering the time scales of interaction and selection leads to dramatic changes outcome evolution. Examples include inefficient strategy Harmony Stag-Hunt games, disappearance coexistence state Snowdrift game. Our results hold for any size more general situations additional factors influencing fitness.

10.1103/physrevlett.97.158701 article EN Physical Review Letters 2006-10-12

We introduce two simple two-dimensional lattice models to study traffic flow in cities. have found that a few basic elements give rise the characteristic phase diagram of first-order transition from freely moving jammed state, with critical point. The presents new transitions corresponding structural transformations jam. discuss their relevance infinite size limit.

10.1103/physreve.48.r4175 article EN Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 1993-12-01

BackgroundWe study the evolutionary Prisoner's Dilemma on two social networks substrates obtained from actual relational data.Methodology/Principal FindingsWe find very different cooperation levels each of them that cannot be easily understood in terms global statistical properties both networks. We claim result can at mesoscopic scale, by studying community structure explain dependence level temptation parameter internal communities and their interconnections. then test our results...

10.1371/journal.pone.0001892 article EN cc-by PLoS ONE 2008-04-01

We outline a vision for an ambitious program to understand the economy and financial markets as complex evolving system of coupled networks interacting agents. This is completely different from that currently used in most economic models. view implies new challenges opportunities policy managing crises. The dynamics such models inherently involve sudden sometimes dramatic changes state. Further, tools approaches we use emphasize analysis crises rather than calm periods. In this they respond...

10.1140/epjst/e2012-01696-9 article EN cc-by The European Physical Journal Special Topics 2012-11-01

Cooperativeness is a defining feature of human nature. Theoreticians have suggested several mechanisms to explain this ubiquitous phenomenon, including reciprocity, reputation and punishment, but the problem still unsolved. Here we show, through experiments conducted with groups people playing an iterated Prisoner's Dilemma on dynamic network, that it what really fosters cooperation. While mechanism has already been observed in unstructured populations, find acts equally when interactions...

10.1038/srep07843 article EN cc-by-nc-sa Scientific Reports 2015-01-19

The evolutionary dynamics of the Public Goods game addresses emergence cooperation within groups individuals. However, on large populations interconnected individuals has been usually modeled without any knowledge about their group structure. In this paper, by focusing collaboration networks, we show that it is possible to include mesoscopic information structure real means a bipartite graph. We compare results with projected (coauthor) and original graphs enhanced contained. conclude...

10.1063/1.3535579 article EN Chaos An Interdisciplinary Journal of Nonlinear Science 2011-03-01

We have carried out a comparative analysis of data collected in three experiments on Prisoner's Dilemmas lattices available the literature. focus different ways which behavior human subjects can be interpreted, order to empirically narrow down possibilities for behavioral rules. Among proposed update dynamics, we find that do not provide significant evidence non-innovative game dynamics such as imitate-the-best or pairwise comparison rules, whereas moody conditional cooperation is supported...

10.1038/srep04615 article EN cc-by-nc-sa Scientific Reports 2014-04-11

Abstract Social norms can help solve pressing societal challenges, from mitigating climate change to reducing the spread of infectious diseases. Despite their relevance, how shape cooperation among strangers remains insufficiently understood. Influential theories also suggest that level threat faced by different societies plays a key role in strength cultures evolve. Still little causal evidence has been collected. Here we deal with this dual challenge using 30-day collective-risk social...

10.1038/s41467-021-25734-w article EN cc-by Nature Communications 2021-09-15

The emergence of COVID-19 dramatically changed social behavior across societies and contexts. Here we study whether norms also changed. Specifically, this question for cultural tightness (the degree to which generally have strong norms), specific (e.g. stealing, hand washing), about enforcement, using survey data from 30,431 respondents in 43 countries recorded before the early stages following COVID-19. Using variation disease intensity, shed light on mechanisms predicting changes norm...

10.1038/s41467-024-44999-5 article EN cc-by Nature Communications 2024-02-16

This dataset originates from TeensLab, a consortium of Spanish Universities dedicated to behavioral research involving teenagers. The contains data 33 distinct educational institutions across Spain, accounting for total 5,890 students aged 10 23 (M = 14.10, SD 1.94), representing various levels such as primary school, secondary sixth form and vocational training. main dimensions covered in this include (i) economic preferences, (ii) cognitive abilities (iii) strategic thinking. Additionally,...

10.1038/s41597-024-04298-6 article EN cc-by-nc-nd Scientific Data 2025-01-03

We consider the electron dynamics and transport properties of one-dimensional continuous models with random, short-range correlated impurities. develop a generalized Poincar\'e map formalism to cast Schr\"odinger equation for any potential into discrete set equations, illustrating its application by means specific example. then concentrate on case Kronig-Penney model dimer The previous technique allows us show that this presents infinitely many resonances (zeroes reflection coefficient at...

10.1103/physrevb.49.147 article EN Physical review. B, Condensed matter 1994-01-01

The scattering of a nonlinear wave packet as an envelope soliton by one-dimensional disordered system is studied. It well known that in the linear limit transmission coefficient decays exponentially with characteristic localization length. We predict, using simple independent approach and perturbation theory framework Schr\"odinger equation, strong nonlinearity above certain threshold allows undistorted propagation packets.

10.1103/physrevlett.64.1693 article EN Physical Review Letters 1990-04-09

During the last few years, much research has been devoted to strategic interactions on complex networks. In this context, Prisoner's Dilemma become a paradigmatic model and it established that imitative evolutionary dynamics lead very different outcomes depending details of network. We here report when one takes into account real behavior people observed in experiments, both at mean-field level utterly networks, cooperation is same. thus show human subjects interact heterogeneous mix...

10.1038/srep00325 article EN cc-by-nc-nd Scientific Reports 2012-03-21

Socially relevant situations that involve strategic interactions are widespread among animals and humans alike. To study these situations, theoretical experimental works have adopted a game-theoretical perspective, which has allowed to obtain valuable insights about human behavior. However, most of the results reported so far been obtained from population perspective considered one specific conflicting situation at time. This makes it difficult extract conclusions consistency individuals'...

10.1126/sciadv.1600451 article EN cc-by-nc Science Advances 2016-08-05

Humans do not always make rational choices, a fact that experimental economics is putting on solid grounds. The social context plays an important role in determining our actions and often we imitate friends or acquaintances without any strategic consideration. We explore here the interplay between imitative behavior coordination problem network. observe for interactions 1D 2D lattices amount of imitation prevents freezing network domains with different conventions, thus leading to global...

10.1038/srep00686 article EN cc-by-nc-nd Scientific Reports 2012-09-24
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