Notes on Technology, Production, and Costs

Technology and Costs

Technology

  • Definition: Processes a firm uses to transform inputs into outputs.
  • Technological change: Improvement in the ability to produce output with fixed inputs.

Short Run vs. Long Run

  • Short Run: Time period where at least one input is fixed.
  • Long Run: Sufficient time to vary all inputs and adapt technology.

Costs

Fixed and Variable Costs
  • Total Cost (TC): Sum of all input costs in production.
  • Variable Costs (VC): Costs that vary with output quantity.
  • Fixed Costs (FC): Costs that remain unchanged with output changes.
  • Equation: TC = FC + VC
Average Total Cost (ATC)
  • ATC = TC / Q
Explicit vs. Implicit Costs
  • Opportunity Cost: Highest-valued alternative sacrificed for action.
  • Explicit Costs: Out-of-pocket costs (monetary).
  • Implicit Costs: Non-monetary opportunity costs.

Production Function

  • Describes relationship between inputs and maximum output achievable.

Short Run Production Example

  • Utilization of workers, copying machines, costs, and output relationships detailed (Table format).

Marginal Product

  • Marginal Product of Labour: Output increase from hiring additional worker.
  • Law of Diminishing Returns: Additional input yields lower marginal returns after certain point.

Marginal Cost (MC)

  • Definition: Additional cost from producing one more unit.
  • Equation: MC = ΔTC / ΔQ

Cost Relationships

  • Average fixed and average variable costs defined, decreasing trends with production increases.
  • All curves (MC, ATC, AVC) exhibit U-shape characteristics.

Long Run Costs

Returns to Scale
  • Long-run average cost curve: Shows minimum cost for given output without fixed inputs.
  • Economies of Scale: Lower long-run average costs with increased production.
  • Diseconomies of Scale: Increasing long-run average costs with larger production levels.
Summary Definitions
  • Total Cost (TC): All input costs.
  • Fixed Costs (FC): Constant costs.
  • Variable Costs (VC): Costs that change with output.
  • Marginal Cost (MC): Cost of producing one more unit.
  • Average Total Cost (ATC): TC divided by output.
  • Average Fixed Cost (AFC): FC divided by output.
  • Average Variable Cost (AVC): VC divided by output.
  • Explicit Costs: Monetary costs.
  • Implicit Costs: Non-monetary opportunity costs.