Group evolving dynamics in biased condition: modeling and analysis

Abstract

We propose a dynamical model for group formation and switching behavior in systems where each group competes for members through attraction functions that are inversely proportional to their current sizes. This attraction is modulated by group-specific bias terms, which can reflect social, economic, or reputational advantages. New entrants choose groups probabilistically based on these weighted attraction scores. We derive the conditions under which the system converges to a stationary equilibrium, where group proportions remain stable over time. The model exhibits rich nonlinear behavior, especially under varying bias strengths and inverse preference intensities. We analyze equilibrium conditions both theoretically and via simulations.

Figures (7)

• Figure 1: Mutual Attraction for group formation
• Figure 2: Analytical solution around fixed point.
• Figure 3: Stability around fixed point due to symmetric Bias
• Figure 4: Group Proportion vs Attraction vs Transition Probabilities vs Group Size over time
• Figure 5: Stability around fixed point due to asymmetric bias

Theorems & Definitions (11)

• Theorem 3.1
• proof
• Theorem 3.2
• Remark 3.3
• Theorem 4.1
• proof
• Theorem A.1
• proof
• proof : Proof of Theorem \ref{['thm:equilibrum']}
• Theorem A.2