Hi You are right to say that demography is a study of a population - how old they are; what gender they are; whether they are leaving their country or new people are joining them from other countries. The word is also used in a looser way I can't speak for the examples you give but, in general, a population would usually benefit from their demography if young people are joining it (either by childbirth or from abroad). That would mean that there is a new workforce who will support the economy On the other hand - as is sometimes the case in the Western world - if people are living longer and having fewer children, then you have an older demography and the government must make plans for the care of more old people Dave
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fantidemographyhttp://www.merriam-webster.com/dictionary/demography
fantithey have benefited from their demographyThere is some advantage to how their population is distributed with respect to young and old, rich and poor, rur