The phrase "underlying source of" is correct and usable in written English
It can be used when discussing the fundamental origin or cause of something, often in academic or analytical contexts.
Example: "Researchers are investigating the underlying source of the disease to develop more effective treatments."
Alternatives: "fundamental cause of" or "root origin of"
After talking with Joe, Breton had little doubt about the underlying source of Zadroga's lung trouble.
But there must have been some initial factor that started the feedback cycle – some underlying source of hesitation.
There is always the impression of craftsmanship, expertness, as the underlying source of it all; and they are not enough".
Meanwhile, the underlying source of our slump, the high level of consumer debt inherited largely from the housing bubble, has declined only slightly.
Whatever the fuse, the underlying source of ferment in the West Bank is a consensus that the Palestinian Authority president, Mahmoud Abbas, has reached a dead end.
Further evidence that argues against larynx height as the underlying source of segmental intonation is the mere order of magnitude of the phenomenon.
To work off their excess inventories, they slash production; once the excess has been disposed of, they raise production again, which shows up as a burst of growth in G.D.P. Unfortunately, growth caused by an inventory bounce is a one-shot affair unless underlying sources of demand, such as consumer spending and long-term investment, pick up.
The starting point (input information) for all the methodologies presented is a single data set of variable complexity, and the results obtained represent the underlying sources of variation (components and factors) enclosed in the raw measurements analyzed.
There is no clear consensus on the specific underlying sources of the inflation differentials among the euro area countries, although there may be a consensus about the fact that they are rooted on structural or institutional factors—see for instance Jaumotte and Morsy (2012) and Beck et al. (2009).
Note, however, that suggestions about underlying sources of the predictability effect remain speculative, as no strong inferences about localization can be drawn on the basis of the present ERP data.
> What are the characteristics and underlying sources of suffering of people receiving counselling for non-PAS?
