# What is producer equilibrium? | Producer equilibrium class 11

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## What is producer equilibrium?

A producer is said to be in equilibrium when he has no tendency to expand or to contract his output.  At this level the producer earn maximum profit.

There are two approaches for determination of producer equilibrium-

(i) TR-TC approach

(ii) MR-MC approach

A producer can reach equilibrium position with two different market situations-

• Under perfect competition where price remains constant.

• Under imperfect competition where price falls with rise in production.

### Total revenue and total cost approach

A firm or producer attains the stage of equilibrium when it maximises its profits, i.e. when he maximises the difference between TR and TC. Under this method there are two essential conditions for producer’s equilibrium are –

• The difference between TR and TC is positively maximised.

• Total profit decrease after equilibrium level of output.

## Producer equilibrium with constant price (Perfect competition market)

Under perfect competition each producer takes the market price of the product. Producers are price taker that is why price remains same at all levels of output. Under this market situations can earn maximum profit, when difference between TR and TC is the maximum.

Producers equilibrium can be explained with the help of following figure-

In the above figure output is shown on the horizontal X axis and total revenue and total cost are on the vertical Y axis. Since price is constant,  TR curve is a straight line passing from the origin. Producer equilibrium will be determined at OM level of output.

Because here the vertical distance between TR and TC curve is the highest. At this level of output, tangent to TC curve at point Q, is parallel to TR curve and difference between both the curves represented by distance QH is maximum.

## Producer equilibrium with price falls (Imperfect)

When price falls as output increases, each producer aims to produce that level of output at which he can earn maximum profit, i.e when difference between TR and TC is the maximum. Let us now discuss producer equilibrium with the help of following figure-

In the above figure at point B and B1, the TR and TC curves cut each other. These are the break even points where TR and TC are exactly equal and profits is zero. Thus the figure shows, at OM output, profit is maximum because the vertical distance SS1 between TR and TC curves is maximum at this level of output.

At this level of output, tangent to TR at point S is parallel to the tangent to TC at point S1 and difference between both the curves, represented by SS1 is maximum. Total profit curve P intersects the horizontal scale at M1 and M2, where profits are zero. At point R (Peak point) total profit is maximum. Thus the producer obtain maximum profits at OM output since the condition of profit maximization is fulfilled.

## Marginal revenue and Marginal cost approach

According to this approach, producer’s equilibrium with maximum profit can be determined with the fulfillment of two necessary conditions-

• Marginal cost must be equal to marginal revenue (MR=MC)

• Marginal cost curve must cut the marginal revenue curve from below.

### Producer Equilibrium with constant price

When price remains constant, producer can sell his product at prevailing price fixed by the market. That is why AR and MR  remains same at levels of output. Both the AR and MR curves are coincide to each other. It can be shown with the help of following figure-

In the above figure, given the price OP, the average revenue curve AR and marginal revenue curve MR is a horizontal straight line. MC is the marginal cost curve which is U shaped. Producer equilibrium will be determined at OM level of output corresponding to point Q. Because at point Q, the following two conditions are fulfilled-

• MC=MR

• MC curve cuts MR curve from below.

At point Q1, although MC=MR, but second condition is not fulfilled.

## Producer equilibrium with price falls

If MR is more than MC, the firm earns super normal profits. On the other hand if MR is less than MC, the firm incur losses. Both the situations are not positions of equilibrium. The equilibrium of the firm will be determined when MC=MR. It is explained through the following figure-

When there is no fixed price and price reduced to increase the output then MR curve slope downwards. In the diagram producer equilibrium will be determined at OM level of output corresponding to point E. Because at this point following conditions are fulfilled.

• MC=MR

• MC curve cuts MR curve from below.