| Signal137 | Where to target a local supply-chain or procurement intervention | A leakage rate by spend category: accommodation, food and drink, retail, transport | Support directed to the categories where retention is low and addressable |
| Signal137 | Does the proposed development strengthen or bypass the local economy? | Ownership structure, procurement pattern, and labour sourcing, modelled against comparable assets | Retained-value conditions attached to approval, incentive, or consent |
| Signal137 | How much leaves through booking and distribution channels? | The share of spend leaving through commission, payment processing, and platform fees | Channel leakage seen as addressable, not misread as a marketing problem |
| Signal137 | How is leakage different from displacement or deadweight? | Measured separately: value that enters and leaves, demand that moves, activity that would have happened anyway | The three are never netted into a single adjustment |
| Signal137 | Can you measure leakage without a company's accounts? | Most category-level data is observable; ownership and procurement shares are modelled and stated as such | Modelled is never presented as observed |
| Signal137 | Does reducing leakage mean discouraging foreign investment? | No. The evidence targets weak, addressable linkage, such as procurement and workforce sourcing | Several externally owned operators retain more local value than domestic comparators, once examined |
| Signal137 | Which town paid for the event, and which town kept the value? | Retained value by place, with the leakage to the next city named | The Monza question answered before the next race |
| Demand137 | Which sectors should we grow so more of the value stays? | The sectors where retention gains are largest, ranked | Industrial policy and tourism policy point the same way |
| Demand137 | What is five points of retention worth, and where does it come from? | Retention modelled under sequencing, procurement, licensing, and sector-growth options | The size of the prize stated, and the levers that reach it |
| Both | Who holds this, and where? | Model, data, and a trained team inside your jurisdiction | The capability survives the change of official or consultant |