英和和英

Current population statistics ¹ may be distinguished from statistics of population change ². They deal with the static aspects of the subject and give an instantaneous picture of the population at a given moment of time: the statistical units (110-1) used are generally households (110-3), individuals (110-2), etc. Statistics of population change are concerned with the continuous processes of change which affect a population, and deal largely with vital events ³,such as births, marriages, deaths, and with migration (801-1). Nonrenewable events ⁴ (e.g. deaths) may be distinguished from renewable events ⁵ such as pregnancies, births or migratory moves; renewable events are assigned an order ⁶ based on the number of previous events of the same nature for the same person. Statistics of population change are a principal source for the study of population processes ⁷, sometimes called population dynamics ⁷. Censuses (cf. 202) are the main source of information on the state of the population ⁸ . Vital Statistics (212-1) are the primary source of data for the study of population growth ⁹ (cf. 701). Occasionally they deal with natural increase ¹⁰ only, i.e. they do not take into account movement between the population studied and other populations, but logically migration statistics (812-1) are a part of the statistics of population change.

• 9. The term population movement is used to refer to the geographical movement of a population.

More...