Which of the Following Is Not a Condition to Estimate $Y _ { i }$

Multiple Choice

Which of the following is not a condition to estimate a model for causality?

A) E[U_i] = E[U_iX_1i] = ... E[U_iX_ki] = 0.
B) The sample is a random sample from the target population.
C) The error terms are distributed normally.
D) The data generating process can be described by a determining function such as $Y _ { i }$ = ?₀ + ?₁X_1i + ...+ ?_kX_ki + U_i.