Demography, Demographic Data, and the Nature of Population Change
As Shakespeare said, all the world is a stage and we people are the actors. Each of us enter the stage at birth and exit from it at death. We play many parts, such as getting ill and getting well, getting married and getting divorced, staying in a place or moving out of it, climbing up or sliding down the social ladder, and all the time getting inexorably older. Demography is the scientific study of this ageless drama. Demographers focus on certain features of us, the actors, and the drama we play. How many of us are around at any given time? Are our numbers growing, declining, or unchanging? How diverse are we in our traits and roles? How does this diversity change over time and space? How are such changes (in size, makeup, and diversity) produced, with what consequences? To study such questions, demographers use data collected in censuses, registration systems, and sample surveys as well as materials assembled by administrators to keep track of what they do.
KeywordsPopulation Change Population Census Registration System Baby Boom Vital Event
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