All four shows are making huge sums because of dynamic pricing, a supply-and-demand strategy that is a primary reason why Broadway has weathered the economic downturn unusually well.

The strategy involves increasing or decreasing prices for certain seats based on week-to-week, or even day-to-day sales trends. A staple of airline booking and the concert industry, dynamic pricing is still relatively new to Broadway, where prices have rarely fluctuated except on holidays.

Markets are good.