Richness premium for linked kinds of data

3x3x to 6.67x

times single-source data, at full richness

How it is computed
How much more health data linking several kinds (records with scans, genomes or treatment data) sells for than single-source data: the market's price ratios between them. Conservative: the lowest ratio in the market is the typical premium, because the richer tiers (expert-curated records, records with genomes) hold more than a contributor uploads. A contribution earns it in proportion to how many kinds of data it links, in full at 4 (a modelling choice).
Strength
Derived: arithmetic on disclosed figures

The evidence (4)