Increase It is the act and the result of growing: enlarge, increase, increase. Demographic , meanwhile, is that related to the demography (the statistical analysis of a human group, linked to its evolution or to a certain moment of it).
Is called population growth or population to the change which is registered in a population in a specific period. The quantification of this change is reflected as the modification of the number of inhabitants per unit of weather .
Suppose, at the beginning of 2000 , a region X had 5000 inhabitants . That same region , At the beginning of 2010 , already had 8600 inhabitants . In a decade (2000-2010 ), Therefore, the region X had a population growth of 3600 inhabitants .
Continuing with the definition of demography, it is the science that is dedicated to the study of human populations, taking into account many of its properties, such as its evolution , its structure and its dimension. The demographic approach is of a statistical type, so that it relates data of different types (such as the number of inhabitants of a region and the date of sampling), analyzes them and draws conclusions, both to understand their current state and to anticipate potential change and prevent certain problems.
There are several theories that explain and analyze the evolution of population growth. Because material resources are scarce, population growth can be a problem, since there are not enough resources to meet the needs of all people.
The population growth rate On the other hand, it expresses in a percentage way the change in the number of members of a population in a given period. For example, a country can record a population growth rate of 4% in a year: its total population, therefore, grew by 4% in twelve months
Population growth is linked to the difference between the number of births and the number of deaths : If more people are born than they die, the population increases. Anyway, there are others factors that affect demography, such as the immigrant and emigrant movement.
A concept strongly linked to population growth is that of population in Balance , which is also known as stable population or constant. It belongs to the field of demography and is about the population whose population growth is nil. The technical terms used in this case are null population growth, zero population growth or zero population growth.
For this phenomenon to occur, it is necessary that between two dates of population analysis, the difference net between migration, deaths and births is equal to zero. In a case like this, it must be possible to build the following equality: number of deaths plus that of emigrants is equal to the number of immigrants plus births.
It is important to note that the fact that population growth is null it does not indicate that the region studied is, as it were, frozen in time; on the contrary, it is possible that it underwent major changes in its mortality and birth rates, in addition to its immigration rates and the age distribution of the inhabitants between the two sampling dates, although this depends on the amount of new or incoming population (the result of births plus immigration) equals the amount of outgoing or outgoing population (the sum of emigration plus mortality).
Depending on the country and the region in particular, population growth has different characteristics, which are linked to the culture and the needs of the inhabitants. For example, while in some cities it is very common for most of their young people to emigrate to study abroad, in others the opposite effect occurs, new students arrive every year.