Simulation ablations show ARC's projected growth requires both primary and secondary hub mechanisms together¶

Claim · All claims
Evidence · 1 study · design r2 · q1
Currency · newest study 2026 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q1 i? At optimism level 6, primary-hubs-only produces 323 programs and initial-primary-plus-secondary-hubs produces 551, compared with 992 under Full ARC. → Jacobson 2026

Evidence¶

Jacobson 2026¶

Jacobson, M. J.; Rodriguez-Rivera, G.; Drineas, P.; and Xue, Y. (2026). Teaching AI, Robotics, & Community: A Hubs-Based K–12 Education Framework for Reaching Rural Schools. https://arxiv.org/abs/2609.18072 doi:10.48550/arxiv.2609.18072

q1 · i? · design · r2

Ablation simulation at optimism level 6 reported in the Spatially-Explicit Markov Model of Growth section: Primary hubs only disables secondary-hub formation; Initial primary + secondary hubs prevents additional primary hubs from activating. Numerical simulation result, not empirical data.

"At optimism level 6, these models produce 323 and 551 programs after 40 years, respectively, compared with 992 underFull ARC."

Discussion¶

Related Claims¶

• Indiana Markov simulation projects ARC reaches 74% of public K–12 schools and produces 992 robotics programs after 40 years at moderate optimism, versus 161 under natural growth — related
• Sensitivity analyses identify Supported secondary-hub formation as the strongest long-term driver of simulated ARC growth — related