This condition has obviously had a derivative effect
on strategy, the property advisory concluded.
The mean cross-partial derivative effect
(labeled "ie") is the average of the cross-partial derivative over all observations in the data set.
Hydro's reported operating profit (EBIT) will be significantly negatively impacted by unrealised derivative effects
related to Hydro's long-term power sourcing contracts.
Then they calculated derivative effects
of these investments throughout the economy -- such as increased sales by suppliers of parts and raw materials and increased transportation costs to haul those materials.