Following the 9/11 terrorist incidence, most countries introduced security charges on air travel, mostly in the form of flat rate per passenger. However, it is clear that such flat rate per passenger may not be socially optimal as implied by previous studies on airport pricing including those...

This study proposes a framework to identify and measure the extent of product differentiation among services provided by transportation firms, and applies it to the US domestic airline markets. By formulating and estimating an Almost Ideal Demand System and a set of price response equations for...