ESTIMATION OF EFFICIENT REGRESSION MODELS FOR APPLIED AGRICULTURAL ECONOMICS RESEARCH



Table 2: RMSE of the 1000-sample slope-parameter estimates under eigth underlying error-term

distributions and the normal and the proposed partially adaptive estimator alternatives.

Normal Estimators

EGB2

Proposed Estimator

Underlying
Distribution

i.i.d.

Heter.

Autoc.

i.i.d.

i.i.d.

Heter.

Autoc.

i.i.d. Var. Cont.

Normal_______

0.284

—

—

0.126

0.115

—

—

i.i.d. Log-

Normal_______

0.291

—

—

0.054

0.050

—

—

Het. Var. Cont.

Normal_______

0.293

0.212

—

0.125

0.112

0.107

—

Het. Log-

Normal_______

0.281

0.202

—

0.117

0.104

0.052

—

0.5 Aut. Var.

Cont. Normal

0.320

—

0.260

0.149

0.141

—

0.114

0.8 Aut. Var.

Cont. Normal

0.388

—

0.208

0.195

0.188

—

0.098

0.5 Aut. Log-

Normal_______

0.334

—

0.238

0.143

0.126

—

0.053

0.8 Aut. Log-

Normal_______

0.439

—

0.219

0.299

0.260

—

0.051

25



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