Identify each of the following statements as true or false and explain why.

A. The effect of a $1 change in price is constant, but the elasticity of demand will vary along a linear demand curve.

B. In practice, price and quantity tend to be individually rather than simultaneously determined.

C. A demand curve is revealed if prices fall while supply conditions are held constant.

D. The effect of a $1 change in price will vary, but the elasticity of demand is constant along a log-linear demand curve.

E. Consumer interviews are a useful means for incorporating subjective information into demand estimation.