In Describing the Data-Generating Process for "Click-Throughs" for One of Your

Multiple Choice

In describing the data-generating process for "click-throughs" for one of your firm's advertising campaigns you've assumed the following relationship: Y_i = f (H_i, J_i) + U_i, where Y_i is if individual i clicked through, H_i is individual i's household income, J_i is an indicator for whether or not individual i has a job. What type of factors might be contained in U_i?

A) A factor that affects J_i but does not affect Y_i.
B) A factor that affects H_i but does not affect Y_i.
C) A factor that affects H_i and Y_i.
D) None of the answers is correct.