Category Archive for: POPULATION CHANGE

Age at Marriage and Sex Ratios

Age at Marriage and Sex Ratios One factor in the birthrate is the proportion of people. who get married and the ages at  which they marry. A study of marriages inKorea found that women married before the age of 19 had an average of 4.02 children during their childbearing years compared to 2.5 children for those married after the…

Read More →

CHANGE IN THE RATES

CHANGE IN THE RATES Throughout most of history,birthrates and death rates have been high, with only a small rate of natural increase. In the Bronze Age of ancient Greece, expectation oHife at birth was an estimated 18, years. :By the’ opening of the -nineteenth- century· it ‘had doubled to about:36 ,years. Less’ than two centuries later, it has doubled again, standing at…

Read More →

SOCIAL AND CULTURAL ASPECTS OF POPULATION CHANGE

SOCIAL AND CULTURAL ASPECTS  OF POPULATION CHANGE What causes a change in the rate of population growth? Research on birthrates sconce both fecundity, the biological capacity to reproduce, and fertility, nonintellectual of reproduction. Fecundity varies greatly between. individuals, but we have no evidence of  differences between large population groups Since our biological capacity to reproduce appears to be constant,and cultural factor must explain…

Read More →

Internal Migration

Internal Migration Each year, nearly one American family in five will move. The past fitty years have seen millions of people moving to the cities of the North and the West from the agricultural areas of the South and the Middle West, plus a considerable movement of Puerto Ricans to the mainland. At present, internal migration patterns are shifting, with more people…

Read More →

International Migration

International Migration Both increasing population and a developing nationalism encourage governments to restrict immigration to the type of immigrants they {pel can most  be assimilated and to the number the nation can easily absorb into its economy. Legal immigrants into the United States, including refugees, averaged 600,000 a year for the period 1979 to 1981, and the number of illegal immigrants was •…

Read More →

MIGRATION

MIGRATION The ancestors of the American Indians are thought to have come to the North American  continent over a land bridge from Asia some time in the remote past. All other Americans trace their ancestry to relatively recent migrants. From the time of the Pilgrims, some 32 million immigrants, mostly from Europe, settled in the united States intolerant political states, mostly but…

Read More →

CHANGING POPULATION COMPOSITION

CHANGING POPULATION COMPOSITION The composition of a population refers to how it is divided according to age, sex, race, ethnic group, occupation, class, and other variables. The age and sex composition of population is most clearly shown in  fellatio pyramid, which shows the of the population in each age and sex e U  see Figure 17-1). Under most cor…

Read More →

POPULATION CHANGE

POPULATION CHANGE Sometimes a population will vary from the  usual sex and age distribution, with certain  predictable social consequences. A population with a large number of children and old people leaves a small proportion of people in productive labor to support them. If the ratio of  en to women (the sex  is markedly unequal, many people will be unable to…

Read More →

Back to Top