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This is the complete lecture note for ECO 202 INTRODUCTION TO ECONOMICS 2. You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Course code: ECO 202 Course title: Introduction to Microeconomics ll Course credit load: 2 Units Series 1: Production and Cost Analysis Series 2: Consumer Behaviour and Market Mechanism Series 3: Market Structures and Pricing Strategies Series 4: Factor Pricing and Income Distribution Series 5: Elementary Price Theory and Applications Suggested Outline Part 1: Short-run and Long-run Production Periods • 1.1 Distinction between short-run and long-run • 1.2 Characteristics of short-run production • 1.3 Characteristics of long-run production Part 2: Cost Concepts and Curves • 2.1 Fixed and variable costs • 2.2 Average and marginal costs • 2.3 Short-run and long-run cost curves Part 3: Production Functions and Technical Progress • 3.1 The Cobb-Douglas production function • 3.2 Returns to scale and factor substitution • 3.3 Technical progress and its impact on production Introduction Production is at the heart of economic activity, since it determines how resources are transformed into goods and services that satisfy human wants. In microeconomics, the study of production and costs provides the foundation for understanding how firms make decisions, how
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS they respond to market conditions, and how efficiency can be achieved. By examining production periods and cost structures, learners gain insight into the dynamics of business operations and the economic forces that shape them. The aim of this Series is to equip you with the knowledge and analytical skills needed to explain production processes, evaluate cost behaviours, and apply these concepts to real-world economic situations. We shall commence this Series by exploring the distinction between short-run and long-run production periods, highlighting the constraints and opportunities firms face in each case. Next, we will move on to cost concepts and curves, where you will learn how fixed, variable, average, and marginal costs interact to influence decision-making. Finally, we will conclude with an examination of production functions, particularly the Cobb-Douglas function, and consider the role of technical progress in shaping productivity and efficiency. Series Learning Outcomes Upon completing this Series, you should be able to: • SLO 1.1 define the concepts of short-run and long-run production periods, • SLO 1.2 explain the distinguishing characteristics of short-run and long-run production, • SLO 1.3 analyse fixed, variable, average, and marginal costs, • SLO 1.4 illustrate the behaviour of short-run and long-run cost curves, • SLO 1.5 apply the Cobb-Douglas production function to demonstrate the relationship between inputs and output, and • SLO 1.6 evaluate the role of technical progress in improving production efficiency. 1 Production and Cost Analysis 1.1 Short-run and Long-run Production Periods 1.1.1 Distinction between Short-run and Long-run In microeconomics, the short run refers to a period in which at least one factor of production, such as capital, is fixed, while other factors like labour can be varied. The long run, on the other hand, is a period in which all factors of production can be varied, allowing firms to adjust fully to changes in demand and technology. For example, a bakery may be able to hire more workers in the short run but cannot immediately expand its building. In the long run, however, it can build a larger facility and install new ovens. In-text question (ITQ): The short run is defined as the period in which at least one factor of production is ________.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 1.1 Placeholder: A diagram showing the difference between short-run and long-run production periods. Distinction between short-run and long-run production. 1.1.2 Characteristics of Short-run Production In the short run, firms face constraints due to fixed inputs. This leads to the law of variable proportions, which states that as more units of a variable input are added to fixed inputs, output initially increases at an increasing rate, then at a decreasing rate, and eventually may decline. This behaviour is explained through three stages: • Stage I: Increasing returns, • Stage II: Diminishing returns, • Stage III: Negative returns. In-text question (ITQ): According to the law of variable proportions, output eventually ________ when too much of a variable input is added to fixed inputs.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 1.2 Placeholder: Graph of total, average, and marginal product curves. Caption: Stages of short-run production. 1.1.3 Characteristics of Long-run Production In the long run, firms can adjust all inputs, which allows them to achieve returns to scale. Returns to scale describe how output changes when all inputs are increased proportionally. • Increasing returns to scale: Output increases more than proportionally to inputs. • Constant returns to scale: Output increases proportionally to inputs. • Decreasing returns to scale: Output increases less than proportionally to inputs. In-text question (ITQ): When output increases more than proportionally to inputs, the firm experiences ________ returns to scale.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 1.3 Placeholder: Graph showing increasing, constant, and decreasing returns to scale. Caption: Returns to scale in long-run production. Pilot questions 1.1 1. In the short run, which type of input remains fixed? 2. What law explains the stages of short-run production? 3. Name the three stages of short-run production. 4. What term describes output increasing proportionally to inputs in the long run? 5. Distinguish between increasing and decreasing returns to scale. 2.1 Cost Concepts and Curves 2.1.1 Fixed and Variable Costs Fixed costs are expenses that do not change with the level of output, such as rent, insurance, or salaries of permanent staff. Variable costs change directly with the level of production, such as raw materials and wages of casual labour. For example, a factory pays the same rent whether it produces 100 or 1,000 units, but the cost of raw materials will rise as more units are produced. In-text question (ITQ): Costs that remain constant regardless of output are called ________ costs.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 2.1 Placeholder: A diagram showing fixed and variable costs. Caption: Relationship between fixed and variable costs. 2.1.2 Average and Marginal Costs Average cost (AC) is the total cost divided by the number of units produced. It shows the cost per unit of output. Marginal cost (MC) is the additional cost incurred by producing one more unit of output. These measures are important because they help firms decide whether producing an extra unit is profitable. In-text question (ITQ): The cost of producing one additional unit is known as ________ cost.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 2.2 Placeholder: Graph showing average and marginal cost curves. Caption: Average and marginal cost behaviour. 2.1.3 Short-run and Long-run Cost Curves In the short run, cost curves reflect the presence of fixed inputs. The average total cost curve typically has a U-shape due to economies and diseconomies of scale. In the long run, firms can adjust all inputs, and the long-run average cost curve is derived from a series of short-run curves, showing the lowest possible cost at each level of output. In-text question (ITQ): The long-run average cost curve is derived from a series of ________ cost curves.
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