Where does windfall collide?

In behavioural economics a windfall is an unexpected, one-off gain (a bonus, a rebate, a small inheritance) that people treat differently from ordinary income rather than as fungible money. Mental-accounting work finds that windfalls are spent more readily than wages or wealth, violating the standard assumption that a dollar is a dollar whatever its source. Thaler's account of fungibility and mental accounts gives the canonical treatment. The referent is a category of income defined by how it arrives and how it is spent, unrelated to trees felled by a storm except through the metaphor.[1]

Unit

An unexpected gain, and the marginal propensity to consume out of it

Recovery means

Not applicable

Measured by

Studied through spending responses to unexpected gains and the mental account they are assigned to

In forest ecology, windfall (or windthrow) is the uprooting or snapping of trees by strong wind, a major natural disturbance that opens gaps in the canopy, redistributes dead wood, and resets patches of forest to earlier successional stages. The pattern and severity depend on wind strength, soil, species, and stand structure, and the gaps shape what regenerates. Everham and Brokaw synthesised how forests are damaged by and recover from catastrophic wind. The referent is a physical disturbance event and the downed trees it leaves, the literal origin of the word that economics later borrowed for a lucky gain.[2]

Unit

The area or volume of trees blown down, and the canopy gaps created

Recovery means

Forests recover as gaps are recolonised and the stand moves back through succession toward canopy closure

Measured by

Assessed by the fraction of stems uprooted or snapped, gap area, and downed-wood volume after a windstorm