"overarching effect" is a correct phrase and can be used in written English.
It means the main or dominant effect that encompasses or influences all other effects. Example: The overarching effect of climate change is causing devastation to various ecosystems and species across the globe.
In case of iv and icv the tree volume was used as a trial overarching effect in eq. 5 as differentiation between trials showed no significance.
Do you feel, on balance – if you are able to remove yourself from the book – that it has one, overarching effect on people who see it?
It will have an overarching effect on many institutions.
The overarching effect was significant in both cases (Table 4).
This appeared to have an overarching effect on impeding access and driving barriers to cancer care for this population.
We conclude that environmental factors have an overarching effect on forest species composition across the broader range of climatic, geologic and topographic conditions and larger geographic scales, while land-use history influences subtropical secondary forest species assemblages within a specific climatic zone or set of relatively narrow environmental conditions.
This suggests an overarching beneficial effect of Enpp1 deficiency on energy expenditure that likely involves other tissues.
The detection of overarching scaling effects often requires a large number of studies in order to obtain a reasonable signal-to-noise ratio.
A further overarching issue was addressed: What approach or approaches to protect amphibians are the most efficient in terms of costs (for the farmer) and effect (on the amphibians)?
But Ms. Greenberger said that while it is true that the specific requirements will be delayed until 2014, some changes should actually happen much sooner, because the law's overarching ban on sex discrimination takes effect immediately.
However, when confronting with institutional interference that is of overarching importance in the Chinese context, these effects could decrease.
