The phrase 'one-time effect' is correct and usable in written English.
It is usually used to refer to something that has a single and brief period of time that it lasts. For example, "The cold medicine had an immediate one-time effect on my headache."
Although, since these changes are not heritable, they have a one-time effect, which may imply some influence on long-term selective situations.
The stabilization effect was a one-time effect, which vanished once the deformed martensite reverted back to austenite on heating.
That is a cost that will be amortized over multiple periods and is not just a one-time effect.
However, the large fraction of non-180° ferroelectric domain switching is a one-time effect during electrical poling.
The tax charge was explained by the bank as being a one-time effect of changes in German tax law in May.
He also advocates limiting malpractice lawsuits (okay, but would have at most a 1% one-time effect in lowering health expenses).
Supply constraints caused by extreme weather conditions appear to have caused price spikes for some foods, like spring onion and cabbage — one-time effects that will not have a lasting effect on overall food prices, he added.
Their price cuts eroded the company's operating profit margin, which, excluding gains from the sale of the Sony Ericsson stake and other one-time effects.
Excluding these and other one-time effects, Ericsson's operating income rose 50 percent in the period, to 2.1 billion kronor from 1.4 billion kronor a year earlier.
The results reflect the one-time effects of the sale of its stake in Debitel communication services and the reorganization of its Adtranz rail unit.
Many economists also worry that recent signs of improvement in parts of Asia may be tied to one-time effects like improved credit conditions and the restocking of inventories by companies.
