demographic transition
noun1
Demographics, Demography The process that represents the transition from high birth and death rates to low birth and death rates as a country develops from a pre-industrial to an industrialized economic system.
- Yet it does bring up a much more real problem about China's demographic transition, which has led some to argue that China will "get old before it gets rich."2011 February 18, James Fallows, “How to Solve China's Gender Imbalance? The 'Babe Tax'”, in The Atlantic, archived from the original on 23 Feb 2011: