High cross price elasticity of demand is an indication that two goods should be included in the same market when attempting to assess concentration.

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High cross price elasticity of demand means that when the price of one good changes, there is a significant change in the demand for another related good. This indicates that the two goods are substitutes or complements, and should therefore be included in the same market when assessing concentration. This is because firms will consider both goods as alternatives when setting prices and deciding on production levels, and they may have market power over both goods.

High Cross Price Elasticity of Demand Is an Indication That