Variable

Coefficient

Estimated

Standard

Deviation

Student

Test

Prob > |t|

intercepte

α₀

3.1379*

8.3674

3.602

0.0005

logy₁

α₁

−2.4017*

0.6398

−3.754

0.0003

logy₂

α₂

1.2494***

0.7509

1.664

0.0993

logw₁

β₁

−3.2091*

1.1425

−2.809

0.0060

logw₂

β₂

−1.73105***

1.02853

−1.683

0.0956

logw₃

β₃

−2.8428**

1.1872

−2.394

0.0185

1/2(logy₁)²

α₁₁

0.09026*

0.01453

6.209

0.0001

1/2(logy₂)²

α₂₂

0.102036*

0.0238

4.286

0.0001

logy₁logy₂

α₁₂

−0.03798***

0.0228

−1.666

0.0990

1/2(logw₁)²

β₁₁

0.32864*

0.09846

3.338

0.0012

1/2(logw₂)²

β₂₂

−0.06691

0.09939

−0.673

0.5024

1/2(logw₃)²

β₃₃

−0.221

0.18432

−1.199

0.2334

logw₁logw₂

β₁₂

−0.0276

0.1246

−0.221

0.8252

logw₁logw₃

β₁₃

0.1362

0.12297

1.108

0.2705

logw₂logw₃

β₂₃

0.004318

0.1163

0.037

0.9705

logy₁logw₁

δ₁₁

0.255696*

0.08057

3.174

0.0020

logy₂logw₁

δ₂₁

−0.2383*

0.08512

−2.600

0.0062

logy₁logw₂

δ₁₂

0.07095***

0.042177

1.682

0.0957

logy₂logw₂

δ₂₂

0.03141

0.03429

0.916

0.3619

logy₁logw₃

δ₁₃

0.10578**

0.04951

2.136

0.0351

logy₂logw₃

δ₂₃

−0.04664

0.04335

−1.076

0.2847

R-square 0.983

Adj R-square 0.9796

Durbin-watson 2.215