What is a characteristic of a product operating under a positive cross-elasticity coefficient?

A product with a positive cross-elasticity coefficient is characterized by being a substitute for another product. This means that when the price of one product increases, the demand for the substitute product also increases. For example, if the price of product A rises, consumers may turn to product B as a viable alternative, leading to increased sales of product B. This relationship indicates that the two products can be used interchangeably to some extent, which is the essence of positive cross-elasticity.

In contrast, complementary products would exhibit a negative cross-elasticity, as their demand moves in opposite directions; when the price of one goes up, the demand for the other declines. Products classified as inelastic have a cross-elasticity of zero, indicating that their demand does not change significantly with price changes of other goods. Lastly, while luxury items might experience unique demand characteristics, the designation of being a luxury does not inherently relate to the concept of cross-elasticity, as it does not determine the substitution relationship with other products.