24110 – APN Bedrock™ (Socio-Economic Position)

APN Bedrock™ is one of five pillars in the APN Social Capital Index™, measuring socio-economic position from five ABS Census/SEIFA-derived indicators: income, housing tenure, employment, mortgage stress, and relative socio-economic advantage.

Bedrock carries a genuine statistical population floor (>200 residents), not an imported convention — ABS Census small-area data becomes unreliable and subject to random perturbation below this threshold, so the floor here reflects a real data-quality constraint specific to this branch’s Census-heavy inputs.

Equal-weighted mean of five components, with the weight shared equally across the components available for each locality. Trinity Rule: minimum 3 of 5 valid components required — the historical precedent the 24100 top-level 3-of-5 floor was itself modelled on.

Each component is a percentile rank within the localities it scores: every component averages close to 50 (between 49.98 and 50.02), with a standard deviation near 28.85, so the component means say nothing about which dimension is stronger nationally. The composite’s spread (σ 20.43) is narrower than any component’s, because averaging five indicators that only partly agree compresses variance.

The APN Bedrock™ Score explained at four levels of depth, from a plain-English introduction to the full architecture and limitations register, with the same three worked localities carried through every tier.

The other four pillars of the APN Social Capital Index™ (24100).