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Differentiation may keep your product from being a generic commodity item, but it does not eliminate the intense competition and low profitability that characterize a commodity business. Although nature of the competition may change, the damage to profit persists because the problem is not lack of differentiation, but the absence of barriers to entry. Understanding the significance of barriers to entry and how they operate is the key to developing effective strategy.
But with a wider variety of luxury cars available, the sales and market shares of Cadillac and Lincoln began to decline. Meanwhile, the fixed costs of their differentiation strategy—product development, advertising, maintaining dealer and service networks—did not contract. As a result, the fixed cost for each auto went up, and the overall profit margin per car dropped. Cadillac and Lincoln found themselves selling fewer cars with lower profit margins. Their profitability shrank even though their products were thoroughly differentiated.
If no forces interfere with the process of entry by competitors, profitability will be driven to levels at which efficient firms earn no more than a “normal” return on their invested capital. It is barriers to entry, not differentiation by itself, that creates strategic opportunities.
Efficiency matters
In copper, steel, or bulk textiles, it is clear that if a company cannot produce at a cost at or below the price established in the market, it will fail and ultimately disappear. Since the market price of a commodity is determined in the long run by the cost levels of the most efficient producers, competitors who cannot match this level of efficiency will not survive. But essentially the same conditions also apply in markets with differentiated products.