The phrase 'effect by which' is correct and usable in written English.
You can use it when referring to a particular effect or result that is produced by a particular action or process. Example: Plastic waste is a growing problem, and global warming is the effect by which it increases.
The effectiveness of ALMPs can be further undermined by the cream-skimming effect, by which only workers with high employment probabilities are selected into the program22.
Their theme is a variation on the so-called butterfly effect by which everything in the world is mysteriously, or scientifically, linked.
(He apparently was not demonstrating the "carryover effect," by which a person who has been stripped of influence continues to behave as if he were still in power).
A nifty bit of physics called the piezoelectric effect, by which certain materials generate an electric current when stressed, offers a way around that.
They also feared a domino effect, by which the resignation of Cardinal Law would prompt calls from parishioners and critics in other dioceses for the resignations of other prelates.
Einstein showed that, applied literally, Planck's quanta would explain a mystery called the photoelectric effect, by which light drives electric current out of certain materials (think of a solar cell).
From these decisions come the ripple effects by which other lives are saved.
When Godard set out, in the nineteen-seventies, to make "Histoire(s) du Cinéma," he knew that his work would depend on complex effects by which to analyze footage, something that he couldn't accomplish easily or economically in film he needed video, and so he needed films to be made available on video.
This study was designed to evaluate the effects by which morphine, a preferential mu-opioid receptor agonist, contributes to cytotoxicity of nitric oxide (NO) species, including NO and peroxynitrite (ONOO−), in primary rat neonatal astrocytes.
A behavioural model is presented to summarize the mechanisms (including vibration breakthrough, visual impairment, neuro-muscular interference and central effects) by which whole-body vibration may interfere with the performance of continuous manual control tasks.
We do not examine species identity effects, by which we mean the (binary) presence or absence of each species across a range of mixtures.
