The HBR case you purchased is priced with one price for students (the lowest price), one price for professors, and one price for the general public. What is this an example of?

Price discrimination

Explanation:

Price discrimination is defined as the situation where a supplier sells identical or similar products to different markets at different prices.

This strategy is successful because different target customers are willing to pay different prices for the same product.

In the given example the HBR is priced differently for students (the lowest price), professors, and for the general public.

These different target markets pay different notices for the same product

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