Firm Supply Demand Curve Facing Competitive Firm Supply

























- Slides: 25

Firm Supply Demand Curve Facing Competitive Firm Supply Decision of a Competitive Firm Producer’s Surplus and Profits Long-Run

The Demand Curve Facing a Competitive Firm

Supply Decision of a Competitive Firm Problem of a competitive firm:

Revenues, Costs, and Profits

Maximum Profits

Optimal Quantity Supplied Firm maximizes: Necessary condition for optimal choice:

An Example Short-run cost function: Marginal cost function:

An Example Average variable costs: Average costs:

An Example Profit maximization: Necessary condition:

An Example

An Example: Profits

Producer’s Surplus Producer’s surplus=Area below price above supply curve Alternatively: below supply curve where area below supply curve (MC):

An Example: Producer’s Surplus

An Example: Producer’s Surplus

Producer’s Surplus and Profits Producer’s surplus: Profits:

An Example: Producer’s Surplus and Profits

An Example Output: Profits:

An Example Profits: Producer’s surplus:

One Exception: or ?

A Second Exception: Shutdown! Profits if firm produces: Profits if firm does not produce: Producing is better if:

A Second Exception: Shutdown! Producing is better if: Rearrange. Produce only if:

Shutdown

The Firm’s Supply Curve

Long and Short Run Supply in Consultant Firm Example

Shutdown in the Short-Run and in the Long-Run In the short-run, the shutdown condition is: In the long-run, the shutdown condition is:
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Profit maximization and competitive supply