Edexcel GCSE Geography B (1GB0) — Development Dynamics
Look at the labels on your electronics or clothing; chances are they were made in a rapidly growing city in an emerging country. As countries develop, their economies shift from primary farming to the secondary (manufacturing) and tertiary (service) sectors. This economic growth is the primary driver of urbanisation, creating massive demand for workers in towns and cities.
Transnational Corporations (TNCs) trigger this shift by injecting Foreign Direct Investment (FDI) into specific areas. This creates a multiplier effect, where initial factory investments create jobs, workers spend their wages locally, and more businesses are attracted in a continuous cycle of growth.
Demographics change rapidly as a result. Rural-to-urban migration accounts for around 40% of this urban growth, driven by push factors like farm mechanisation and pull factors like the promise of formal employment, which offers legal protection and taxes, rather than unregulated informal employment.
The remaining 60% of urban growth comes from natural increase. Cities attract young adults of reproductive age, increasing birth rates, while better urban healthcare lowers death rates.
The mathematical relationship for this demographic shift is:
Why does London generate 22% of the UK’s wealth despite having only 13% of its population? The Core-Periphery Model explains this unequal distribution of wealth and development. Economic activity tends to concentrate heavily in an urban core, leaving the rural periphery behind.
The core benefits from historical trade links, government policy, and excellent infrastructure hubs. It features high population densities, high wages, and a concentration of high-paying quaternary and tertiary jobs. For example, the UK core is the London and South East region, while in India, Maharashtra acts as an economic core.
In contrast, the periphery relies on primary industries like farming or mining and suffers from a lack of investment. Young, educated people often migrate to the core for better opportunities, a process known as the brain drain. This leaves the periphery with an ageing population, such as in Cornwall or the Indian state of Bihar.
Over time, the core absorbs resources, capital, and skilled labour from the periphery in a process called the backwash effect, which widens regional disparity. Eventually, wealth may trickle down to the periphery through trade or government grants, known as the spread effect.
How can geographers mathematically prove that one region is being left behind while another thrives? They analyse socio-economic data using the arithmetic mean. A common metric is Gross Value Added (GVA), which measures the value of goods and services produced in an area.
By calculating the average GVA of several regions and comparing an individual region to that average, you can determine if an area is a wealthy core or a lagging periphery. A positive difference indicates a core region outperforming the average, while a negative difference highlights a struggling periphery.
The formula used is:
A geographer is investigating regional inequality in an emerging country. Calculate the difference from the mean for the coastal region (Region A) and the rural interior (Region C) using the GVA per capita data below. (Region A = US$22,000; Region B = US$15,000; Region C = US$6,000; Region D = US$9,000)
Step 1: Calculate the arithmetic mean of all regions.
Step 2: Calculate the difference for Region A using the formula.
Step 3: Calculate the difference for Region C using the same formula.
Step 4: State the final answers clearly with units and polarity.
Students often assume migration is the sole cause of urban growth, but actually natural increase accounts for the majority (around 60%) of urbanisation in emerging countries.
In 'Explain' questions about regional inequality, examiners expect a chain of reasoning; use phrases like 'which leads to' (e.g., 'TNC investment creates jobs, which pulls rural migrants, resulting in a younger demographic').
When asked for the 'rate of urbanisation', you will only gain full marks if you mention both rural-to-urban migration AND natural increase.
When calculating differences from the mean, always use the exact formula (Region Value - Mean) rather than simply subtracting the smaller number from the larger one, so that you correctly get a negative value for periphery regions.
Urbanisation
The process by which an increasing percentage of a country's population comes to live in towns and cities.
Multiplier effect
A process where initial investment in a region leads to job creation, increased local spending, and attracts further businesses in a continuous cycle.
Rural-to-urban migration
The movement of people from the countryside to towns and cities, often driven by push and pull factors.
Formal employment
Work that is officially recognised, taxed, and regulated by the government, offering job security and legal protection.
Informal employment
Unregulated and untaxed work with no legal protection, which is very common in rapidly growing cities in emerging countries.
Natural increase
The population growth that occurs when the birth rate is higher than the death rate, excluding the effects of migration.
Core-Periphery Model
A geographical concept explaining how economic wealth and development concentrate in a central urban core, while the rural periphery remains dependent and less developed.
Core
The most developed and economically active region of a country, usually characterised by high investment, dense populations, and well-developed infrastructure.
Periphery
A less developed region that often provides raw materials and labour to the core but suffers from a lack of investment.
Brain drain
The outward migration of skilled, young, and educated people from the periphery to the core in search of better opportunities.
Backwash effect
The negative impact of core growth, where resources, capital, and skilled labour are sucked out of the periphery, widening the wealth gap.
Regional disparity
The measurable socio-economic differences, such as gaps in wealth, health, or education, between different geographical areas within a country.
Spread effect
The process where wealth eventually trickles down and spreads from the core to the periphery through trade or government intervention.
Arithmetic mean
The mathematical average of a dataset, calculated by adding all values together and dividing by the total number of items.
Gross Value Added (GVA)
An economic measure of the value of all goods and services produced in a specific area, industry, or sector.
Put your knowledge into practice — try past paper questions for Geography B
Urbanisation
The process by which an increasing percentage of a country's population comes to live in towns and cities.
Multiplier effect
A process where initial investment in a region leads to job creation, increased local spending, and attracts further businesses in a continuous cycle.
Rural-to-urban migration
The movement of people from the countryside to towns and cities, often driven by push and pull factors.
Formal employment
Work that is officially recognised, taxed, and regulated by the government, offering job security and legal protection.
Informal employment
Unregulated and untaxed work with no legal protection, which is very common in rapidly growing cities in emerging countries.
Natural increase
The population growth that occurs when the birth rate is higher than the death rate, excluding the effects of migration.
Core-Periphery Model
A geographical concept explaining how economic wealth and development concentrate in a central urban core, while the rural periphery remains dependent and less developed.
Core
The most developed and economically active region of a country, usually characterised by high investment, dense populations, and well-developed infrastructure.
Periphery
A less developed region that often provides raw materials and labour to the core but suffers from a lack of investment.
Brain drain
The outward migration of skilled, young, and educated people from the periphery to the core in search of better opportunities.
Backwash effect
The negative impact of core growth, where resources, capital, and skilled labour are sucked out of the periphery, widening the wealth gap.
Regional disparity
The measurable socio-economic differences, such as gaps in wealth, health, or education, between different geographical areas within a country.
Spread effect
The process where wealth eventually trickles down and spreads from the core to the periphery through trade or government intervention.
Arithmetic mean
The mathematical average of a dataset, calculated by adding all values together and dividing by the total number of items.
Gross Value Added (GVA)
An economic measure of the value of all goods and services produced in a specific area, industry, or sector.
