Search results
Results From The WOW.Com Content Network
Along with mortality rate, natality rate is used to calculate the dynamics of a population. They are the key factors in determining whether a population is increasing, decreasing or staying the same in size. Natality is the greatest influence on a population's increase. Natality is shown as a crude birth rate or specific birth rate.
The low birth rates in the contemporary United States can possibly be ascribed to the recession, which led families to postpone having children and fewer immigrants coming to the US. The current US birth rates are not high enough to maintain the size of the U.S. population, according to The Economist. [69] [70]
Demographic economics or population economics is the application of economic analysis to demography, the study of human populations, including size, growth, density, distribution, and vital statistics.
The population momentum is calculated by dividing this final total population number by the starting population. [4] Momentum, Ω, can be expressed as: = In this equation, b is the crude birth rate while e o is the life expectancy at birth. Q is the total number of births per initial birth.
Preventative checks" were factors which Malthus believed could affect the birth rate such as moral restraint, abstinence and birth control. [18] He predicted that "positive checks" on exponential population growth would ultimately save humanity from itself and he also believed that human misery was an "absolute necessary consequence". [ 19 ]
One long-term effect of a declining birth rate could be a slowing economy. As the population expands, the economy has a larger workforce, which produces more goods and services. The net result is ...
Consequently, inequality lowers average education and hampers economic growth. [22] Also, in countries with a high burden of this kind, a reduction in fertility can hamper economic growth as well as the other way around. [23] Richer countries have a lower fertility rate than poorer ones, and high income families have fewer kids than low-income ...
A fishery population is affected by three dynamic rate functions: Birth rate or recruitment. Recruitment means reaching a certain size or reproductive stage. With fisheries, recruitment usually refers to the age a fish can be caught and counted in nets. Growth rate. This measures the growth of individuals in size and length.