Table 7 OLS result of the Heckman two-step selection model

Sex of the household head

− 21.581

15.322

0.159

Age of the household head

− 1.239^a

0.695

0.074

Family size in adult equivalent

1.653

5.448

0.762

Children under 6 years in number

− 6.163

9.169

0.502

Education status of the household head

21.007^a

12.231

0.086

Land holding in hectares

26.124^c

7.797

0.001

Lactating dairy cows owned in number

15.756^c

2.961

0.000

On-farm income in Ethiopian birr

− 4.141

3.576

0.247

Non-farm income in Ethiopian birr

− 5.392

7.091

0.447

Access to market information

17.318

17.662

0.327

Access to credit service

18.270

11.710

0.119

Membership in dairy cooperative

2.899

12.744

0.820

Constant

− 9.220

47.605

0.846

Lamda

44.397^b

18.932

0.019

Rho

1.000

Sigma

44.397

Number of obs

150

Censored obs

92

Uncensored obs

58

Wald chi² (12)

66.36

Prob > chi² (2)

0.0000