Many firms offer “core” and “side” goods in the sense that side-good consumption is conditional on core-good consumption. Airports are a common example where the supply of runway and terminal capacity is the core good and the supply of various concession services (for example, car rental...

Most airports operate under public ownership, while some are privatized and economically regulated. Only a few airports are privately owned and experience little or no ex-ante regulation of airport charges. On the other hand, airports nowadays earn as much revenue from transport-related...

This paper analyzes single-till and dual-till regulations in terms of social welfare. We clarify two conditions to determine which regulation yields a higher welfare. The first condition is whether the solutions under welfare maximization yield positive or negative regulatory profits. The second...