Note(s): The LM χ² and associated p-values are from the Breusch–Pagan Lagrange Multiplier test of panel effects (H₀: Var(μ_i) = 0); the intra-class correlation ρ = σ_u²/(σ_u²+σ_e²) is taken from the random-effects specification; the Hausman χ² and p-values test the null that the random-effects estimator is consistent (no correlation between μ_i and X), with rejection indicating fixed effects; the Mundlak χ² and p-values are Wald tests on time-averaged regressors to detect correlation with μ_i (H₀: no correlation); “—” indicates the test was not conducted, “N/A” indicates it is not applicable to the dynamic GMM model; all χ² statistics are significant at p < 0.001 unless stated otherwise; firm-clustered robust standard errors are used throughout