$2.5B/yr seems like a lot of added revenue for the industry, but this is a very, very high-revenue, low-margin business. Has anyone actually modeled the cost of

$2.5B/yr seems like a lot of added revenue for the industry, but this is a very, very high-revenue, low-margin business. Has anyone actually modeled the cost of especially first bag fees? Some obvious sources include: - Longer boarding times - Passenger loss (to alternative transport, or no transport at all) Just considering boarding/turnaround times, increasing them by 10% could easily wash out the entire revenue stream for the airlines.