What happens when you cut the supply of Northwestern football by 75%?

WSJ: Price goes up by 900%!

Ryan Field, where Northwestern played until this season, sat over 47,000 fans—nearly four times as many as the [temporary] cv lakeside stadium.

Tickets for last Saturday’s home game against Indiana started at $129 on the school’s official site, an increase of more than 900% on the $17 average secondary-market price for last season’s home opener.

The shift in capacity creates a natural experiment, a movement along the demand curve, that allows us to calculate the Price Elasticity of Demand for Northwestern football. 

(Price Elasticity of Demand) = (% change in quantity)/(% change in price) = (-75)/900 = -1/12, 

a very inelastic demand, i.e., one whose quantity does not respond much to price changes.  

But this natural experiment may over-estimate demand elasticity because the quality of the new stadium, particularly its intimate feel and views of Lake Michigan, is higher than the old one.  This increase (shift) in demand due to higher quality increases the price change, making demand appear less elastic than if the new stadium were the same quality as the old one.  

HT: Lamar