Variable

First Hurdle (Probit)-Participation Equation

Second Hurdle (truncated model)-Quantity Equation

Coeff.

SD

z-value

P-value

Marginal Effect

Coeff.

SD

t-value

P-value

Constant

−12.8214

4.072223

−3.1485

0.001641

0.954253

0.130468

7.314079

0

Sex of household head (Male = 1)

0.696379

0.62181

1.119924

0.262746

0.035925

0.040707

0.053636

0.758961

0.447876

Age of house head

0.023538

0.037376

0.629777

0.528841

0.001214

−0.00377

0.002299

−1.64162

0.10067

Illiterate (Yes = 1)

1.252693

0.672449

1.862881

0.062479

0.064625

−0.09405

0.040602

−2.31642

0.020536

Farming experience

−0.09416

0.034634

−2.71883

0.006551

−0.00486

0.000164

0.002318

0.07073

0.943612

Man equivalent

0.948064

0.444916

2.130884

0.033099

0.04891

0.027345

0.014632

1.868854

0.061643

Farm size (Timad)

1.011262

0.415938

2.43128

0.015046

0.05217

−0.06683

0.00827

−8.08108

0

Number of plots

0.236153

1.007502

0.234394

0.814679

0.012183

0.023495

0.029691

0.791324

0.428755

Vertisoil (Yes = 1)

1.190357

0.897762

1.325916

0.184868

0.061409

−0.03967

0.049968

−0.79389

0.427258

Very fertile plot (Yes = 1)

−1.49587

1.166723

−1.28211

0.199804

−0.07717

−0.08185

0.050862

−1.60917

0.107579

Tropical Livestock Unit

0.20416

0.181575

1.124383

0.260851

0.010532

0.029548

0.008198

3.604403

0.000313

Number of oxen

0.170393

0.468382

0.36379

0.716015

0.00879

−0.04829

0.020243

−2.3853

0.017065

Log Value of Communication Equipment (Birr)

0.189898

0.16126

1.177586

0.238962

0.009797

0.004208

0.006278

0.670222

0.502717

Log Annual off-farm income

0.136916

0.076623

1.78689

0.073955

0.007063

0.016783

0.005086

3.299765

0.000968

No of information sources

1.819245

0.49008

3.71214

0.000206

0.093853

−0.00939

0.015202

−0.61781

0.5367

No of DA contacts per annum

0.012353

0.014808

0.834234

0.404149

0.000637

0.001069

0.000959

1.11421

0.265189

Distance to DA (Hours)

−0.94389

0.570878

−1.6534

0.09825

−0.04869

0.024556

0.017674

1.389361

0.164723

Distance to nearest market (Hrs)

−1.02453

0.464588

−2.20524

0.027437

−0.05285

−0.07511

0.031358

−2.39527

0.016608

Trained row planting (Yes = 1)

5.484458

1.696345

3.233103

0.001225

0.282937

−0.21659

0.072078

−3.00491

0.002657

Access to credit (Yes = 1)

−0.12399

0.558785

−0.2219

0.824394

−0.0064

−0.0516

0.046058

−1.12026

0.262604

Labor per Land (Days)

0.007566

0.014181

0.533551

0.593652

0.00039

0.000397

0.001046

0.379187

0.704549

Inverse Mills Ratio

0.144466

0.082595

1.749093

0.080275

SD of error terms (Sigma)

0.25156

0.011284

22.29292

0

χ² Value (P-value)

172.3893 (0.0000)

162.23145(0.0000)

χ² Value (P-value)

175.38635 (0.0000)

Log likelihood (Truncated)

−41.329551

Log likelihood (Probit)

−42.886928

Log likelihood (Separate Tobit)

−117.97504