Comprehensive Course Notes on Economic Geography and Locational Theory
Scope and Foundations of Economic Geography
Economic geography is a primary branch of human geography that investigates the spatial distribution of economic activities, specifically focusing on the locations where these activities occur and the reasons behind their concentration in certain areas while other locations develop differently. It examines the intricate relationships between people, places, natural resources, and overarching economic systems. The field essentially asks three fundamental questions: Where are economic activities located? Why are they located in those specific spots? How do these locations evolve and change over time? As the most developed branch of major geography, economic geography analyzes how economic forces mold landscapes and influence developmental trends across spatial dimensions, from the local level to the global economy.
The scope of this discipline covers the spatial distribution of various industries, trade, transportation, urban economies, and the impacts of globalization. Geographers define economic geography as the study of human economic activities under varying conditions involving the production, location, distribution, consumption, and exchange of resources. It applies geography's general concern with spatial variation to how individuals earn a living and how livelihood systems vary from place to place. Key areas of exploration include the spatial organization of economic activities, the relationship between economic processes and the geographical environment, and the roles of technology, labor, and capital in shaping economic landscapes. Furthermore, it analyzes the impact of these activities on regional development and social well-being, highlighting the increasing interdependence of regional and global economies.
Environmental, Cultural, and Systematic Influences on Economics
Economic activities do not occur in isolation but are deeply embedded in physical and cultural realities. Aspect involves physical environmental influences, where economic production patterns are rooted in spatially variable circumstances. Natural resources like minerals, forests, and water bodies dictate a region's specialization, while climate conditions drastically influence agricultural productivity and labor markets. Geographical barriers such as mountains and rivers impact trade routes and accessibility. Aspect involves cultural considerations such as social norms, traditions, and linguistic commonalities that shape business relationships. For example, culturally based food preferences, like a preference for maize, may dictate crop choice regardless of environmental limitations. Aspect is technological development, referring to the tools and methods a society possesses; preindustrial societies might have no use for coal or iron ore reserves if they lack the technology to exploit them. Aspect concerns political decisions, such as those made by the Trump administration regarding new tariffs, which can encourage or discourage economic patterns through subsidies or production restrictions. Aspect involves economic factors of demand, expressed through free market mechanisms, government instruction, or personal consumption requirements.
Humanity allocates and produces resources through various economic systems, though none exist in a truly pure or isolated form in the modern world. Subsistence economies are traditional systems where goods and services are produced and consumed by kinship groups with limited market exchange or surplus. These systems are governed by survival needs and available resources. Commercial economies, or market economies based on capitalism, are the most dominant globally; here, market competition, supply, and demand determine price and quantity. In contrast, planned economies involve strict government control over the supply and pricing of goods and services, as seen in the communist model of North Korea.
Classification of Economic Activities and the Workforce
Economic activities are broadly grouped into four categories based on their relationship with resources and technology. Primary activities are directly dependent on the environment and involve the utilization of the Earth's resources, including land, water, vegetation, and minerals. These include hunting, gathering, pastoral activities, fishing, forestry, agriculture, mining, and quarrying. Secondary activities involve adding value to existing products by changing their forms through processing or manufacturing. This sector includes industries like automobile production and textiles. Workers in the secondary sector are often referred to as blue-collar workers. Notably, commercial farming is sometimes categorized here due to its reliance on modern technology and hybrid seeds.
Tertiary activities focus on providing personal and business services such as those performed by clerks or barbers. These workers are known as pink-collar workers. Quaternary services are a specialized form of services provided in specific environments requiring high levels of knowledge, technical skills, and administration. Examples include health services in hospitals, teaching in schools, software services, and financial consulting. The professionals in this sector, such as researchers and legal consultants, are classified as white-collar workers. The proportion of the workforce engaged in these sectors serves as a vital indicator of a country's economic development stage.
Primary Economic Sector: Agriculture and Resource Extraction
The primary economic sector represents the beginning of the production cycle where humans are in the closest contact with environmental potentialities. While developing nations often retain a substantial portion of their workforce in primary activities—particularly agriculture—developed nations utilize advanced technologies like genetically engineered crops, efficient irrigation, and mechanized farming. Agriculture, the growing of crops and tending of livestock, is the most significant primary activity and has largely replaced hunting and gathering globally.
Agricultural activities are classified along a continuum from subsistence to advanced commercial systems. Subsistence agriculture is mostly non-commercial and aimed at self-sufficiency, common in parts of Africa, East Asia, and South America. It is split into two types: Extensive subsistence agriculture involves large land areas with minimal labor input per hectare (), resulting in low product per land unit and low population densities. Intensive subsistence agriculture involves small landholdings with high expenditures of labor, resulting in high yields and high population densities. Traditional or intermediate agriculture represents a transition phase where farmers adapt to the climate and utilize some mechanization to produce staple foods for both home consumption and regional market sales, thereby increasing food security.
Commercial Agriculture and Agricultural Location Models
Commercial agriculture refers to large-scale operations focused on profit rather than personal consumption. It is guided by economic principles like cost-benefit analysis and market mechanisms. Key features include market-oriented production, heavy use of biotechnology and machinery, specialization in high-demand crops, and integration with agribusiness where farms supply raw materials to food processing industries. A defining concept in this field is the von Thünen model of agricultural location, developed by Johann Heinrich von Thünen (). He observed that different farm products develop in concentric rings around a major urban market based on transportation costs and land value.
The von Thünen model identifies four distinct rings. The first ring, closest to the city, features intensive, high-value, and perishable products like dairy and market gardening, where high transportation costs are justified by proximity. Historically, the second ring was dedicated to forests for fuel wood. The third ring contains extensive field crops like grains that are less perishable and easier to store. The fourth ring is reserved for livestock ranching, where land is cheapest and transportation costs are less critical. While globalization has changed these patterns, the model's logic remains visible today in urban-influenced farming and the location of highly perishable crop farms.
Secondary and Tertiary Economic Sectors
The secondary economic sector transforms raw materials into finished, consumable goods through manufacturing and refining. This process ranges from simple handicraft production to the assembly of sophisticated space vehicles or electronic equipment. Key examples include copper smelting, steel making, and metalworking. This sector is a primary driver of urbanization, as the industrialization process converts rural areas into towns and cities. The geography of manufacturing is characterized by the diffusion of technology from points of origin to various regions across multiple scales.
The tertiary economic sector involves the distribution and consumption of goods and services, acting as the vital link between producers and consumers. This sector includes business services like accounting and advertising, as well as consumer services like healthcare, catering, and hair salons. In modern times, this includes e-commerce and streaming platforms such as DSTV, Netflix, Showmax, Takealot.com, Shein, and TEMU. While the tertiary sector employs less than of the workforce in many developing countries, it account for nearly of the workforce in developed nations. Location factors for this sector include proximity to clients, labor availability, and infrastructure.
Theoretical Models of Industrial Location
Industrial location decisions are complex and involve weighing various cost considerations and profit prospects. For manufacturing, factors like raw materials, power supply, labor costs (skilled vs. unskilled), market size, and transportation accessibility (road, rail, air) are critical. Freight rates and terminal costs also play a role, as do break-of-bulk points where goods are transferred between transport modes. The classical model in this field is Alfred Weber’s () Least Cost Theory, which seeks to identify the optimum location by minimizing three expenses: relative transport costs, labor costs, and agglomeration costs (the clustering of people and activities for mutual advantage).
Weber’s analysis was based on controlling assumptions: an area is a uniform isotropic plain; manufacturing involves a single product for a single market; inputs come from multiple known source locations; labor is infinitely available but immobile; and transportation costs reflect weight and distance via the shortest path. Using these, he derived the "locational triangle," assuming two raw material sources and one market form the points of a triangle within which the factory should be placed to minimize transport costs. However, Weber noted that significant variations in labor or agglomeration costs might shift the optimum location away from the point of least transport cost.
Locational Interdependence and Profit Maximization
Locational Interdependence Theory suggests that competitors tend to cluster together to maximize market share and constrain rival territory. A common example is two ice cream vendors on a beach; instead of spreading out, they both move toward the center to capture the largest possible customer base. This theory is especially relevant in sectors where consumer choice is heavily influenced by location. In contrast, profit-maximization approaches argue that the previously mentioned theories are too restrictive. These theorists propose the substitution principle, which suggests that producers can replace a declining amount of one input (like labor) with an increase in another (like capital for automation) or increase transport costs if it significantly reduces land rent, provided the net profit remains high.
Contemporary Global Production and High-Technology Industries
Modern economies are characterized by globalization, flexible production, and the "time-space compression" facilitated by communication infrastructure. Contemporary manufacturing often utilizes "just-in-time" production, where items are produced for specific orders rather than storage, making the system highly responsive to market demands. Comparative advantage is sought through specialization and trade, allowing nations to exchange commodities at a lower cost than domestic production. This has led to a new international division of labor involving outsourcing (subcontracting processes) and offshoring (contracting foreign companies for specific inputs). A prime example is Nike, where products are designed in the United States but manufactured in China.
Transnational Corporations (TNCs) have become central to this borderless economy, operating branch operations in multiple foreign nations. High-technology manufacturing, including aerospace, biotechnology, and software, follows different logic than classic location theories. These industries prioritize human talent—engineers and scientists—over raw materials. High-tech industries exhibit locational tendencies: proximity to major research universities, avoidance of areas with strong labor unions, availability of venture capital, a high quality of life (scenery and culture), and first-rate communication facilities. Silicon Valley in California serves as the premier example of such a high-tech cluster. In many developed regions, deindustrialization in the late century led to a definitive shift toward these high-order, knowledge-based consumer and producer services.