Computational Model Library

Digital divide and opinion formation

Dongwon Lim | Published Fri Nov 2 02:44:17 2012 | Last modified Mon May 20 11:17:43 2013

This model extends the bounded confidence model of Deffuant and Weisbuch. It introduces online contexts in which a person can deliver his or her opinion to several other persons. There are 2 additional parameters accessibility and connectivity.

A Simulation of Entrepreneurial Spawning

Mark Bagley | Published Wed Jun 8 19:33:28 2016 | Last modified Fri Jun 30 11:01:46 2017

Industrial clustering patterns are the result of an entrepreneurial process where spinoffs inherit the ideas and attributes of their parent firms. This computational model maps these patterns using abstract methodologies.

Effect of communication in irrigation games

Marco Janssen Jacopo Baggio | Published Wed Jan 14 04:08:32 2015 | Last modified Wed Aug 9 01:28:22 2017

The model includes different formulations how agents make decisions in irrigation games and this is compared with empirical data. The aim is to test different theoretical models, especially explaining effect of communication.

Opinion Dynamics Under Intergroup Conflict Escalation

Meysam Alizadeh Alin Coman Michael Lewis Katia Sycara | Published Fri Mar 14 22:12:37 2014 | Last modified Wed Oct 29 18:13:27 2014

We develop an agent-based model to explore the effect of perceived intergroup conflict escalation on the number of extremists. The proposed model builds on the 2D bounded confidence model proposed by Huet et al (2008).

06b EiLab_Model_I_V5.00 NL

Garvin Boyle | Published Sat Oct 5 08:27:46 2019

EiLab - Model I - is a capital exchange model. That is a type of economic model used to study the dynamics of modern money which, strangely, is very similar to the dynamics of energetic systems. It is a variation on the BDY models first described in the paper by Dragulescu and Yakovenko, published in 2000, entitled “Statistical Mechanics of Money”. This model demonstrates the ability of capital exchange models to produce a distribution of wealth that does not have a preponderance of poor agents and a small number of exceedingly wealthy agents.

This is a re-implementation of a model first built in the C++ application called Entropic Index Laboratory, or EiLab. The first eight models in that application were labeled A through H, and are the BDY models. The BDY models all have a single constraint - a limit on how poor agents can be. That is to say that the wealth distribution is bounded on the left. This ninth model is a variation on the BDY models that has an added constraint that limits how wealthy an agent can be? It is bounded on both the left and right.

EiLab demonstrates the inevitable role of entropy in such capital exchange models, and can be used to examine the connections between changing entropy and changes in wealth distributions at a very minute level.

Shared Norms and the Evolution of Ethnic Markers

Nathan Rollins | Published Fri Jan 22 17:35:22 2010 | Last modified Sat Apr 27 20:18:45 2013

The publication and mathematical model upon which this ABM is based shows one mechanism that can lead to stable behavioral and cultural traits between groups.

cultural group and persistent parochialism

Jae-Woo Kim | Published Mon Nov 8 06:23:12 2010 | Last modified Sat Apr 27 20:18:28 2013

Discriminators who have limited tolerance for helping dissimilar others are necessary for the evolution of costly cooperation in a one-shot Prisoner’s Dilemma. Existing research reports that trust in

Agent-Based Computational Model of the cryptocurrency Bitcoin with a realistic market and transaction system. Bitcoin’s transaction limit (i.e. block size) and Bitcoin generation can be calibrated and optimized for wealth and network’s hashing power by the Non-Dominated Sorted Genetic Algorithm - II.

Model to assess factors that influence local communities compliance with protected areas policies

Gustavo Andrade | Published Mon Nov 21 05:50:54 2011 | Last modified Sat Apr 27 20:18:40 2013

We built a model using R,polr package, to assess 55 published case studies from developing countries to determine what factors influence the level of compliance of local communities with protected area regulations.

Evolution of cooperative strategies from first principles

Marco Janssen | Published Mon Jan 4 22:49:23 2010 | Last modified Sat Apr 27 20:18:30 2013

The purpose of this model is to study the evolution of cooperation when agents are endowed with a limited set of receptors, a set of elementary actions and a neural network agents use to make decision

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