Homogeneous Product

Homogenous products refer to the items that are perfect substitutes where the buyer finds no real difference between the products offered by different organizations. Price remains to be the single most important dimension.

In such a scenario, the existence of such products facilitates cooperation; simultaneously, heterogeneous products completely different from each other cannot be easily substituted. 

Product Differentiation

Price competition in the homogenous goods market produces a perfectly competitive outcome, even with two firms.

If there are many participating entities - free entry and exit and relatively homogenous product, it can be designed as perfectly competitive (PC). 

The assumptions related to perfect competition are 

• All firms produce homogenous goods, and consumers view them as identical.

• All buyers and sellers have perfect information about the manufactured goods' price and quality.

• Buyers and sellers cannot influence the price at which the item is purchased or sold, which means the buyers and sellers are price takers.

• There are no transaction costs for participating in the market.

• Each business unit bears the full cost of the production process, and there are no externalities that one can impose on others. 

• One can "enter and exit" any industry without a certain expense. 

• There exists perfect divisibility of the output. 

The key condition for a competitive market is price taking, where every firm and every consumer must take the market price of the good as provided, and there are no one-sided rules that can affect the price by their choice of how to buy or sell. 

Market Supply Curve

A curve shows how many units can be produced together at each price.

It shows the quantity one may produce at each price to derive the supply curve.

If the market's supply curve combines the data from all the individual units, then an increase in the number of competitors will reduce profit for each. Each will have a smaller share of loss in the case of loss. 

In general, in such models, the profits may be short-term and not long-term, not economic but accounting profits.

PC & Social welfare 

A PC model maximizes social welfare as the production cost equals its social value.

Economists favour such markets because it maximizes welfare for a given initial allocation of resources and wealth.  

Further, the theory states income distribution is supported by a competitive equilibrium plus the system of income transfers. 

Examples of such situations are publicly owned land gazed at by sheep farmers, where each producer considers their profit and does not consider overgrazing a problem. Rather everyone would probably be better off with restrictions on using such fields, but producers dislike restrictions on gazing rights.

Similarly, the cost of oil per barrel is determined at one platform to regulate profits.