From a single number to a range
The familiar approach gives you one figure for total impact. It usually comes from multiplying attendance by self-reported spending, with a few assumptions stacked underneath. The number looks precise. The uncertainty behind it is invisible.
- •A range names the conservative estimate and the upper bound out loud.
- •It separates new visitor spending from spending that was going to happen anyway.
- •It changes the conversation from defending a figure to explaining what it means.






