The outbound buyer cohort view is the supplier-side BD primitive. A supplier evaluating a destination needs the lane reality (size, growth, exporter density) and the buyer cohort shape (concentrated vs distributed), grounded in trade flows but anonymised at the counterparty layer. PharmaDB enforces that boundary at the query layer. The view is molecule_country_flow; the join is to lane_competitiveness. Refresh cadence is weekly.