Notes on Technology, Production, and Costs
Lecture 4: Technology, Production, and Costs
Readings: All of Chapter 6
Technology
Definition: Technology refers to the processes a firm utilizes to transform inputs into outputs of goods and services.
Technological Change: Represents the modifications in a firm's capability to produce output with the same quantity of inputs.
Short Run vs. Long Run
Short Run
Definition: A time frame where at least one input in production is fixed.
Characteristics: Limits the firm's ability to vary production levels.
Long Run
Definition: An extended period allowing the firm to adjust all inputs, update technology, and change the physical size of its operations.
Characteristics: Every input can be varied, reflecting strategic decision-making.
Costs of Production
Types of Costs
Total Cost (TC): Complete cost incurred from utilizing all inputs in production.
Formula: TC = Fixed Cost (FC) + Variable Cost (VC)
Fixed Costs (FC): Costs that remain constant regardless of the output level.
Variable Costs (VC): Costs that fluctuate with the volume of production.
Average Total Cost (ATC)
Formula: ATC = TC / Output (Q)
Opportunity Costs
Costs Analysis
Opportunity Cost: The highest value alternative sacrificed when choosing an activity.
Explicit Costs: Costs consisting of tangible monetary expenditures.
Implicit Costs: Non-monetary opportunity costs associated with a firm’s resources.
Production Function
Definition: Demonstrates the correlation between the inputs a firm employs and the maximum output achievable with those inputs.
Example: Julie Johnson's Photocopying Store
Costs Per Year | Amount ($) |
|---|---|
Paper | 20,000 |
Wages | 48,000 |
Lease for Copiers | 10,000 |
Electricity | 6,000 |
Lease for Store | 24,000 |
Forgone Salary | 40,000 |
Forgone Interest | 3,000 |
Economic Depreciation | 10,000 |
Total | 161,000 |
Short Run Production: Table 6.2
Workers | Machines | Copies | Fixed Cost ($) | Variable Cost ($) | Total Cost ($) | Cost per Copy ($) |
|---|---|---|---|---|---|---|
0 | 2 | 0 | 30 | 0 | 30 | NA |
1 | 2 | 625 | 30 | 50 | 80 | 0.13 |
2 | 2 | 1325 | 30 | 100 | 130 | 0.10 |
3 | 2 | 2200 | 30 | 150 | 180 | 0.08 |
… | … | … | … | … | … | … |
Marginal Product of Labour
Marginal Product of Labour (MPL): Additional output from hiring one more worker.
Law of Diminishing Returns: At a certain point, adding variable inputs (like labor) with fixed inputs will lead to a decreasing marginal product.
Marginal Cost (MC)
Definition: The change in total cost when producing one additional unit of a good or service.
Formula: MC = ΔTC / ΔQ
Long-Run Costs
Returns to Scale
Long-Run Average Cost (LRAC) Curve: Indicates the lowest cost for producing a specific output level in the long run.
Economies of Scale: Decrease in LRAC as production expands; more efficient over larger outputs.
Constant Returns to Scale: LRAC remains steady despite output adjustments.
Minimum Efficient Scale (MES): The lowest output level where all economies of scale are utilized.
Diseconomies of Scale: Increase in LRAC with larger production scales, usually due to inefficiencies.
Summary of Key Definitions
Term | Definition | Formulas |
|---|---|---|
Total Cost | All input costs in production | TC |
Fixed Costs | Constant costs with output changes | FC |
Variable Costs | Changing costs with output variations | VC |
Marginal Cost | Cost of producing one additional unit | MC = ΔTC / ΔQ |
Average Total Cost | Total cost per output unit | ATC = TC / Q |
Average Fixed Cost | Fixed cost per output unit | AFC = FC / Q |
Average Variable Cost | Variable cost per output unit | AVC = VC / Q |
Implicit Cost | Non-monetary opportunity cost | NA |
Explicit Cost | Monetary costs incurred | NA |
Conclusion
These concepts form the foundation of understanding economic decisions related to technology, production, and costs in a firm.