Check instrument strength via first-stage partial F (internal) — .check_instrument

Computes partial F-statistics for G (in X ~ G + W + covars) and Gm (in M ~ X_hat + Gm + W + covars), matching the first-stage regressions used by fit_iv2sls() and fit_iv2sls_mediation2().

Usage

.check_instrument_strength(
  data,
  min_f = 10,
  g_threshold = NULL,
  gm_threshold = NULL,
  n_cores = 1
)

Arguments

data: iconic_data object.
min_f: Minimum acceptable partial F. Default 10.

Value

List: F_G, F_Gm, weak_G (logical), weak_Gm (logical).