theorem ols_consistent_when_exogenous (ρ : ℝ) {varZ : ℝ} (_hvarZ : varZ ≠ 0) : olsPlim ρ 0 varZ = ρ := by simp [olsPlim, simultaneityBias, zero_div]
thesis/CESProofs/Foundations/CESEstimation.lean:209
CES Estimation Theory: Connecting Theory to Data