The Most Robust (But Perhaps Impractical) Way to Estimate the Price

Multiple Choice

The most robust (but perhaps impractical) way to estimate the price elasticity of demand for your product would be:

A) to ask past customers their willingness to pay.
B) convert your products prices in real terms and estimate a demand curve.
C) randomize the price over a period of time and estimate the difference in sales resulting from those changes.
D) announce an upcoming discount, and track sales increases pre-post.