Figure 3.3 contains data on pharmaceutical sales in the United States for cancer drugs (i.e., oncology). Your task is to calculate the CR4, CR8, and HHI for this market.

Calculate the Market Share

You will do this by first figuring out the market share of each firm's oncology sales. Take the number on the right side of the chart for the firm's revenues in billions. You have to calculate the market share of each firm by dividing its individual revenue by the total industry revenue.

Calculate the Total Industry Revenue

To get the total industry revenue, add together all of the firms' revenues.

Calculate Your Metrics

Finally, calculate your metrics (CR4, CR8, and HHI).

Oncology sales of top-10 players $120 billion Celgene Bristol-Myers Squibb $27.07B Roche 24.52 Merck & Co 17.20 Pfizer 15.60 AstraZeneca 14.86 Johnson & Johnson 11.80 Novartis 10.78 AbbVie 10.04 Astellas Pharma 6.52 2018 2024 PROJECTED Bristol-Myers Squibb expects to close its purchase of Celgene later this year