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arXiv · 2611.04407

Competition, Switching, and Control in Coupled Adoption-Opinion Dynamics

Martina Alutto·Fabrizio Dabbene·Angela Fontan·Karl H. Johansson·Chiara Ravazzi
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Abstract

We propose a Multi-technology AdopTion-opinion co-Evolution (MATE) model to describe the diffusion of $m \geq 2$ competing alternatives within a networked population whose opinions evolve under social influence and the feedback generated by adoption. Communities interact through two layers: a physical network governing exposure to adoption, and a social network shaping opinion evolution through social imitation. Individuals can adopt a technology, eventually becoming dissatisfied at a rate reflecting the quality of the technology, and switch to an alternative at a rate driven by their opinion of that alternative. For an arbitrary number of competing technologies $m \geq 2$, we characterize the equilibria and establish the existence of an adoption-diffused equilibrium in which all technologies coexist. For $m > 2$, the equilibrium configuration depends on the broader competitive environment: unlike the two-technology case, within-community relative adoption generally depends also on equilibrium opinions and on the other alternatives. Finally, we formulate finite-horizon opinion-shaping control problems, derive necessary optimality conditions via the discrete-time Pontryagin maximum principle, and compute numerical extremals using a forward-backward sweep method.

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Martina Alutto, Fabrizio Dabbene, Angela Fontan, Karl H. Johansson, Chiara Ravazzi. 2026-11-03. Competition, Switching, and Control in Coupled Adoption-Opinion Dynamics. https://arxiv.org/abs/2611.04407

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