The Buxton Index of an entity, i.e. person or organization, is defined as the length of the period, measured in years, over which the entity makes its plans.
For the little grocery shop around the corner it is about 1/2,for the true Christian it is infinity, and for most other entities it is in between: about 4 for the average politician who aims at his re-election, slightly more for most industries, but much less for the managers who have to write quarterly reports.
The Buxton Index is an important concept because close co-operation between entities with very different Buxton Indices invariably fails and leads to moral complaints about the partner.
This is an interesting concept: and one that helps explain a lot of attitudes and responses towards issues like climate change, environmental destruction, and DRM.
In each case there are two different parties that are thinking in terms of two completely different Buxton indices. Short term profit vs. longterm survival in AGW or short term data security vs. longterm preservation of cultural artefacts in DRM.