Demography is the study of the changes in numbers of births, deaths, marriages, and cases of disease in a community over a period of time.
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demographer (demographers)
...a politically astute economist and demographer.
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Demography is the study of the changes in numbers of births, deaths, marriages, and cases of disease in a community over a period of time.
N-UNCOUNT
demographer (demographers)
...a politically astute economist and demographer.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012