Dependence Index (DPI)
How unthinkable withdrawal of Halcyon care has become. Dependence is more durable, and cheaper, than force.
Formula
Thresholds & Bands
| Band | Range | State |
|---|---|---|
| Deep | ≥ 70 | ok |
| Moderate | 40-70 | warn |
| Shallow | < 40 | crit |
Why This Metric Matters
The Dependence Index quantifies the structural lock-in that makes voluntary withdrawal from Halcyon care economically and physiologically unthinkable. High dependence is the most cost-effective compliance mechanism available to the Directorate, requiring no enforcement apparatus and generating its own reinforcement loop. A declining index signals that alternative care pathways or black-market substitutes are eroding the switching cost, which, left unchecked, converts passive subjects into active decision-makers. The Directorate's long-term stability model assumes DPI above 70 across all covered populations.
Threshold Justification
The "Deep" threshold of 70 was derived from PANACEA behavioral modeling, which identifies this as the inflection point above which voluntary departure rates fall below statistical noise. The "Shallow" band below 40 corresponds to historical conditions observed in pre-Accord populations where organized withdrawal programs achieved measurable traction.
Historical Context
DPI was introduced as a formal metric in 2020 following the Behavioral Systems division's finding that enforcement-based compliance was six times more expensive than dependency-based retention. The index has trended upward steadily, reaching a system-wide average of 74 in Q1 2026, driven largely by the reformulated long-acting depot compounds introduced in 2024.
Collection Method
The composite index is assembled by the Behavioral Systems unit within R&D, drawing on withdrawal-severity telemetry from Halo implant biometric streams and switching-cost models maintained by PANACEA. Economic dependency data is supplemented by Synaptic Data Fabric feeds covering prescription refill patterns, insurance lock-in rates, and provider-network exclusivity metrics.
Known Failure Modes
The index can overstate dependence in populations with high Halo implant penetration, as the biometric stream captures physiological withdrawal potential but may miss psychological readiness to tolerate discomfort. Black-market substitute compounds that mimic Halcyon agent profiles can artificially maintain withdrawal-severity readings while the actual switching cost approaches zero. Periodic recalibration against field-observed departure rates is required to prevent model drift.