Why Southwest Airlines is Running Three Revenue Management Systems at Once

Plus: Southwest considers redeye departures and extra midday flights at focus cities.

Dear readers,

Have you noticed any wonkiness with Southwest Airlines' pricing?

You're humans, so you may not have observed any difference. But Southwest has been running three revenue management systems at once. It is testing two new platforms while still running its existing scheme for some flights, all to determine which produces the best revenue, execu…