Rock climbing is a dangerous sport, with an average of 30 rock climbers dying each year in the United States and many more suffering serious injuries. Earnings of rock climbers vary greatly. While most earn less than $10,000 per year, the best generally those who've accomplished the most dangerous climbs-can earn as much as $300,000 per year through
sponsorships, public speaking engagements, books, and movies. The difference in earnings between the highest- and lowest-paid rock climbers reflects:
-compensating differentials.
-the superstar effect.
-efficiency wages.
-signaling.
