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In the long run, both demand and supply of a product will affect the equilibrium in perfect competition. A firm will receive only normal profit in the long run at the equilibrium point. [43] As it is well known, requirements for a firm's cost-curve under perfect competition is for the slope to move upwards after a certain amount is produced.
The concept of perfect competition represents a theoretical market structure where the market reaches an equilibrium that is Pareto optimal. This occurs when the quantity supplied by sellers in the market equals the quantity demanded by buyers in the market at the current price. [13]
Likewise, firm 2's reaction function q2=R2(q1). The Cournot-Nash equilibrium occurs where the two reaction functions intersect and both firms are choosing the optimal output given the output of the other firm. The Nash equilibrium is widely used in economics as the main alternative to competitive equilibrium.
The concept of long-run cost is also used in determining whether the firm will remain in the industry or shut down production there. In long-run equilibrium of an industry in which perfect competition prevails, the LRMC = LRAC at the minimum LRAC and associated output.
That would make the market more contestable. Sunk costs are those costs that cannot be recovered after a firm shuts down. For example, if a new firm enters the steel industry, the entrant needs to buy new machinery. If, for any reason, the new firm cannot cope with the competition of the incumbent firm, it will plan to move out of the market.
This is the case for the long-run equilibrium of perfect competition. Productive efficiency occurs when units of goods are being supplied at the lowest possible average total cost. When drawing diagrams for businesses, this condition is satisfied if the equilibrium is at the minimum point of the average total cost curve. This is again the case ...
In the long run, a firm will theoretically have zero expected profits under the competitive equilibrium. The market should adjust to clear any profits if there is perfect competition. In situations where there are non-zero profits, we should expect to see either some form of long run disequilibrium or non-competitive conditions, such as ...
More and more firms will enter until the economic profit per firm has been driven down to zero by competition. Conversely, if firms are making negative economic profit, enough firms will exit the industry until economic profit per firm has risen to zero. This description represents a situation of almost perfect competition.