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By the end of this lesson, students will be able to (per CED LO SPS-7.B):
- Explain the spatial patterns of industrial production and development (per LO SPS-7.B).
- Distinguish the five economic sectors — primary, secondary, tertiary, quaternary, and quinary — and describe their distinct development patterns (per EK SPS-7.B.1).
- Identify how labor, transportation (including shipping containers), the break-of-bulk point, least cost theory, markets, and resources influence the location of manufacturing (per EK SPS-7.B.2).
- Describe the core, semiperiphery, and periphery framework and apply it to real countries (per EK SPS-7.B.2).
- Apply Skill 2.B: explain spatial relationships in a specified context or region using geographic models and theories such as Weber's least cost theory.
Key Concepts
Per EK SPS-7.B.1 and EK SPS-7.B.2, Topic 7.2 covers two linked ideas. The first is that economies contain five sectors, and the mix of sectors signals a country's development stage. The second is that manufacturing location is not random but responds to six identifiable factors, producing the familiar geography of cores, semiperipheries, and peripheries.
Skill 2.B — what the AP asks students to do
Skill 2.B asks students to explain spatial relationships in a specified context or region of the world using geographic concepts, processes, models, or theories. For Topic 7.2, the models of record are the Clark-Fisher sector model and Weber's least cost theory. Students should be able to apply them to new cases, not just recite them.
The Primary Sector
The primary sector extracts raw materials directly from the natural environment.
Extracting what nature provides
Includes farming, fishing, forestry, mining, and petroleum extraction. Per EK SPS-7.B.1, the primary sector is characterized by distinct development patterns: it dominates employment in low-income economies and remains important in resource-rich middle-income economies.
Classic national specializations include Ghana gold, Saudi Arabia petroleum, Chile copper, and Canada lumber. The location is fixed by geology, climate, or biogeography, so primary activity is inherently place-based.
The Secondary Sector
Manufacturing and construction
Converts raw materials into finished or intermediate goods: steelmaking, auto assembly, apparel stitching, electronics assembly, and construction of buildings and infrastructure.
Per EK SPS-7.B.1, the secondary sector dominates in newly industrialized countries (NICs). Specializations include Vietnam garments and electronics, Bangladesh textiles, Mexico maquiladoras along the United States border, and China automobiles and consumer goods.
The Tertiary Sector
Services to businesses and consumers
Retail, hospitality, restaurants, transportation, healthcare, education, and government services. The tertiary sector is the largest employer in middle-income and high-income economies.
Per EK SPS-7.B.1, development patterns are clear: as incomes rise, people spend proportionally less on manufactured goods and more on experiences, care, and services. Germany, Japan, South Korea, and the United States all have tertiary employment exceeding 65 percent of the workforce.
The Quaternary Sector
Knowledge and information
Research and development, finance, information technology, education, consulting, and media. The quaternary sector produces intangible value: ideas, data, financial instruments, software, and analysis.
Per EK SPS-7.B.1, it concentrates in global financial centers such as New York City, London, Tokyo, Singapore, and Zurich, and in research hubs such as Silicon Valley, Bengaluru, and Shenzhen.
The Quinary Sector
Top-level decision-making
Chief executive officers, senior government officials, university presidents, and major foundation executives. The quinary sector is the smallest by headcount but sets strategy for governments, corporations, and institutions worldwide.
Per EK SPS-7.B.1, quinary activity concentrates in alpha world cities: New York City, London, Tokyo, Paris, Hong Kong, Singapore, and Washington DC. These are the places where the largest decisions are made.
Development Patterns Across Sectors (EK SPS-7.B.1)
The Clark-Fisher sector model formalizes the pattern in EK SPS-7.B.1. As a country develops, employment shifts from primary to secondary, then to tertiary, and finally to quaternary and quinary. Each shift is a marker of economic transformation.
| Stage | Dominant Sector | Example Country | Primary share |
|---|---|---|---|
| 1 | Primary | Ethiopia | ~75 percent |
| 2 | Secondary rising | Vietnam | ~35 percent |
| 3 | Tertiary dominant | Mexico | ~12 percent |
| 4 | Tertiary and quaternary | Germany | < 2 percent |
The contrast between Ethiopia (about 75 percent of workers in primary agriculture) and Germany (under 2 percent in primary, 69 percent in tertiary, rising quaternary share) is a textbook Skill 2.B comparison. It is not just a statistical curiosity. It tells you about infrastructure, education systems, urbanization, and the kinds of policies each country is likely to pursue.
Location Factors for Manufacturing (EK SPS-7.B.2)
EK SPS-7.B.2 names six factors that influence where manufacturing locates. These are the workhorse vocabulary for any Unit 7 FRQ about industrial siting.
Labor
Availability, skill, and cost of workers. Low-wage labor-intensive manufacturing concentrates in Bangladesh garments and Vietnam electronics. High-skill labor-intensive manufacturing, such as German machine tools, seeks engineers.
Transportation (and shipping containers)
Cost and speed of moving inputs and outputs. Malcom McLean's 1956 shipping container revolution made intercontinental manufacturing feasible. Today about 90 percent of non-bulk world trade moves by container.
Break-of-Bulk Point
A location where cargo changes mode (ship to rail, rail to truck). Because handling is costly, factories cluster here. Examples: Rotterdam, Shanghai, Los Angeles or Long Beach (ports); Chicago and Kansas City (rail-to-truck).
Least Cost Theory (Weber 1909)
Alfred Weber: a firm locates where the sum of transport costs, labor costs, and agglomeration costs is minimized. Uses a locational triangle among inputs, market, and labor pool.
Markets
Proximity to buyers. Auto assembly tends to locate near major car markets (United States South, northern Mexico, southern Germany) because shipping finished autos is expensive.
Resources
Steelmaking historically located where iron ore and coal coincided: the Ruhr (Germany), Pittsburgh (United States), and Wuhan (China). Weight-losing industries stay close to bulky raw materials.
Weber's weight-gaining vs weight-losing distinction
Weber observed that some processes lose weight in manufacturing (smelting ore to metal; pressing sugar cane to sugar) and others gain weight (soft-drink bottling adds water and packaging). Weight-losing production locates near resources to avoid shipping waste; weight-gaining production locates near markets to avoid shipping heavy finished goods. Auto assembly is roughly weight-neutral but locates near markets because finished cars are bulky and expensive to transport.
Core, Semiperiphery, and Periphery (EK SPS-7.B.2)
EK SPS-7.B.2 names core, semiperiphery, and periphery locations as the manufacturing geography that results from the six location factors. The vocabulary comes from Immanuel Wallerstein's world-systems theory (1974).
High-value production
Advanced manufacturing, finance, research, headquarters. Examples: United States, European Union members, Japan, South Korea, Canada, Australia.
Mid-value production
Industrial hubs that are neither fully dominant nor fully dependent. Examples: Mexico, Brazil, South Korea (transitional), Turkey, Poland, Thailand, Malaysia.
Low-value production
Primary resources and low-wage assembly for core markets. Examples: Haiti, much of sub-Saharan Africa, parts of Central Asia, Bangladesh (garments), parts of Central America.
The three tiers are not fixed. South Korea moved from periphery (1960) to semiperiphery (1980) to core (2000). China has moved rapidly from periphery to semiperiphery and is arguably becoming core in many sectors. Mobility between tiers is one of the most important questions in development economics.
Skill 2.B — Explaining Spatial Patterns
Skill 2.B asks students to use models to explain spatial relationships. Two worked examples.
Example 1: Why does a brewery locate near water?
Apply Weber. Beer is mostly water, so brewing adds considerable weight to the input grains. Shipping finished beer is expensive per unit of value. Weight-gaining industry: locate near the market or near large water sources close to the market. This is why regional breweries cluster in population centers rather than in remote grain-growing regions.
Example 2: Why do auto plants cluster along the Interstate 65 corridor in the United States South?
Apply the six factors. Labor: non-union, lower wages than the traditional Midwest auto belt. Transportation: Interstate 65 connects Detroit suppliers south through Indiana, Kentucky, Tennessee, and Alabama; deep-water ports at Mobile and Savannah access imported parts. Markets: Southern and mid-Atlantic population growth. Resources: cheap electricity from Tennessee Valley Authority hydroelectric and natural gas. Agglomeration: once Nissan located in Tennessee in 1983, suppliers clustered, attracting Toyota, Mercedes, Hyundai, and Honda. Least cost: the corridor minimizes the sum of labor, transport, and agglomeration costs for final assembly aimed at the growing Southeast market.
Country Case Studies
Four cases that illustrate different sector mixes and manufacturing geographies.
Germany · Manufacturing Core
Germany is a textbook core economy. Its strength is high-value secondary manufacturing — machine tools, autos, chemicals, precision instruments — built on the Mittelstand of mid-sized family-owned firms, vocational training (dual system), and dense supplier networks in the Ruhr, Baden-Wurttemberg, and Bavaria. Quaternary finance concentrates in Frankfurt.
Country page →
Bangladesh · Peripheral Garments
Bangladesh hosts the world's second-largest garment industry after China, with about 4,000 factories employing roughly 4 million workers, mostly women. The location logic is labor cost: among the lowest garment wages globally. It is a clear case of periphery manufacturing feeding core markets in Europe and North America through containerized shipping from Chittagong.
Country page →
Vietnam · Semiperiphery on the Rise
Vietnam is the clearest current example of a periphery-to-semiperiphery transition. Samsung assembles about half of its global smartphones in Vietnamese plants; Nike, Adidas, Intel, and Foxconn have all built large factories. The logic: low labor cost, improving infrastructure, Trans-Pacific Partnership-style trade agreements, and coastal port access.
Country page →
Nigeria · Primary Petroleum + NIC Transition
Nigeria remains dominated by primary petroleum, but Lagos has emerged as a tertiary and early quaternary center — fintech ("Nollywood" for film, Andela for software talent), banking, and media. The challenge for NIC transition is diversifying away from oil and building domestic manufacturing; power-supply constraints are the biggest single obstacle.
Country page →Discussion Questions
- Per EK SPS-7.B.1, each sector has distinct development patterns. Pick two countries at different stages (for example Ethiopia and Germany) and explain how their sector mix reflects their development stage. Use Skill 2.B.
- Apply Weber's least cost theory: choose a real product (bottled water, smartphones, wind turbines) and predict where it should be manufactured. Justify using the six factors in EK SPS-7.B.2.
- Containerization is named in EK SPS-7.B.2. Explain how the 1956 shipping container invention changed the spatial pattern of manufacturing. Why did it enable peripheral locations to supply core markets?
- Why do some semiperipheral countries (South Korea, Taiwan) successfully move into the core while others (Brazil, Mexico) have stalled? What geographic and institutional factors matter?
- Apply Skill 2.B: a multinational corporation is deciding between Bangladesh and Vietnam for a new garment factory. Using the six location factors in EK SPS-7.B.2, explain which the firm is likely to choose and why.
Classroom Activities
Sector Pie Charts
Students build pie charts of employment by sector for three countries at different income levels (for example Ethiopia, Vietnam, Germany) using World Bank data. They write a short paragraph explaining how the three charts illustrate the Clark-Fisher pattern named in EK SPS-7.B.1.
Weber's Least Cost Application
Students apply Weber's least cost theory to decide where to locate three hypothetical facilities: a steel mill, a soft-drink bottling plant, and a software firm. For each they identify which of the six factors (labor, transport, break-of-bulk, markets, resources, agglomeration) dominates and defend a location choice.
Vocabulary
Standards Alignment
Draft alignment — pending educator review. AP HG codes correspond to the official College Board Course and Exam Description (Effective Fall 2020, V.1). Statements below are paraphrased in CountryReports' own voice; refer to the College Board's published CED for verbatim wording.
Suggested Skill
Enduring Understanding
Learning Objective
Essential Knowledge
AP® and Advanced Placement® are registered trademarks of the College Board. The College Board was not involved in the production of this material and does not endorse it. Standards statements above are paraphrased; codes refer back to the official College Board CED, the NCSS C3 Framework, the Common Core State Standards, and other cited frameworks.
AP Practice Questions
- (A) Primary sector (extraction).
- (B) Secondary sector (manufacturing and construction).
- (C) Tertiary sector (services).
- (D) Quaternary sector (finance and research).
- (E) Quinary sector (top-level decision-making).
Correct: (C). Tertiary (services) at 72 percent is the largest. Per EK SPS-7.B.1, this is the characteristic pattern of a developed high-income economy.
Scoring: 1 point for Weber definition (minimizes transport + labor + agglomeration); 2 points for break-of-bulk definition + identifying Rotterdam (Site 2) as a break-of-bulk port; 2 points for Skill 2.B application to Site 3 Tennessee with justification (proximity to United States market, low-cost non-union labor, agglomeration with existing Southern auto cluster, Interstate 65 corridor transport); 2 points for containerization impact: enabled intercontinental supply chains, allowed peripheral manufacturing to feed core markets, standardized break-of-bulk handling and reduced transport cost.