Population Dynamics and Global Migration Patterns
Natural Movement of the Population
The natural movement of the population is defined as the difference between births and deaths.
Birth and Fertility Rates
Birth expresses the total number of children born in a particular place in a year. The characteristics of birth include:
- Birth rate: This relates the number of births to the total population of a territory.
- Fertility rate: This relates the number of births to the population of women of childbearing age.
Mortality and Life Expectancy
Mortality refers to the total number of people dying in a particular place in one year. The features of mortality include:
- Mortality rate: The number of deceased persons relative to the total population.
- Infant mortality rate: This relates the number of babies who die before reaching one year of age to the number of live births in a territory.
Life expectancy expresses the average number of years a person expects to live from birth.
Migration and Demographic Tools
Migration is a set of travels undertaken by people from one place to another, whether within the same country or between different countries. Net migration is the result of the difference between immigrants and emigrants.
The Population Pyramid
A population pyramid is the graphic representation of the population in one location at a given time, categorized by sex and age. The characteristics of a population pyramid include:
- Vertical axis: Represents age groups, typically in intervals of 5 years.
- Horizontal axis: Represents the base group of the pyramid, displaying facts and figures by age.
The Age of Migration
Migration flows today affect almost every country in the world, either as transmitters or as receivers. Migrants are often categorized by their training and political situation:
Migrant Training
- Qualified: People with studies who find no work for which they are prepared.
- Untrained: People who have not had access to education and can only take on low-skilled and poorly paid jobs.
Political Situation
- Legalized: People living with approved temporary or permanent residence.
- Refugees: Intolerance and ethnic wars in many countries have resulted in a massive exodus to other countries.
- Undocumented: Migration that is illegal, massive, and difficult to control.
Scope of Travel
- National: When performing a change of residence within a single country.
- International: Migrants crossing borders to move between different states.
Causes and Displacement Factors
The causes of displacement are often divided into two categories:
- Push factors: Movements caused by economic, political, or sociocultural disasters, or environmental issues.
- Pull factors: Movements attracted by abundant labor opportunities and high living standards.
Migration in Modern Spanish Society
Spain has become a country of immigration; the number of resident foreigners with residence permits is growing steadily. Immigrants in Spain include:
- Africans, Latin Americans, and Eastern Europeans: Individuals looking for work and more worthy living conditions; many arrive through clandestine means.
- Retired Northern Europeans: Individuals who install themselves permanently in Spain in search of a better climate and a non-urban environment.
- High-wage workers: Individuals from the rest of the European Union who live in Spain temporarily for work.
Consequences of Immigration
Immigration has several significant impacts on society:
- It contributes to population growth.
- It slows general aging within the population.
- Immigrants work mainly in the service sector.
- They pay taxes and help fund pensions.
- It sometimes causes difficulties with social integration.