"population imbalance" is a correct and usable phrase in written English.
You can use it to refer to a situation when there is an unequal or disproportionate number of people of one gender, age, or type compared to another. For example, "The country is suffering from a population imbalance, with a disproportionate number of elderly people compared to the younger population."
Even the spread of properly licensed clinics could lead to a population imbalance, given the Chinese mania for boys.
So shouldn't Europe be more liberal about immigration, to redress its population imbalance?
As a result, and because of cultural preferences for sons, China faces a growing population imbalance, with many more boys than girls.
IRAQ'S WIDOWS EYE FUTURE Iraq faces a population imbalance, with decades of conflict leaving an estimated one million widows.
Girls are in demand as future wives, the film implies, because with the sex-selection practiced by couples so they have a male child, there is a population imbalance.
The National People's Congress, China's Parliament, has scrapped a proposal that would criminalize abortions based on the sex of the fetus, the state media reported, despite a growing population imbalance between males and females.
After sexual maturity, female groupers can change into males to compensate for population imbalances, becoming "secondary males" in a process called protogyny.
(The process became the norm after the Supreme Court ruled in 1964 that large population imbalances between districts violated the principle of one person one vote.) Mr. Frost represents the Dallas-Fort Worth area (not Austin) and Mr. Doggett the Austin area (not Houston).
For strong interactions, near a Feshbach resonance, superfluidity was observed for a broad range of population imbalances.
Other elite programs that weigh-in school performance in their admission process have similar population imbalances favoring girls.
One of these actions is to reduce the force of underlying stresses, "Experts of all types have generated a considerable quantity of good ideas about how we can reduce the force of the tectonic stresses I've identified in this book - population imbalances, environmental damage, climate change, and income gaps.
