Smallholder dairy producers’ participation in dairy marketing in Southern Omo Zone, Ethiopia

Pastoralism

Research, Policy and Practice

Table 6 Probit result of the Heckman two-step selection model

Variables	Coefficient	Std. Err.	P > \|z\|	Marginal effect
Sex of the household head	0.786	0.607	0.195	0.283
Age of the household head	0.045	0.031	0.151	0.015
Family size in adult equivalent	0.074	0.192	0.699	0.025
Children under 6 years in number	− 0.189	0.298	0.526	− 0.063
Education status of the household head	1.117^b	0.517	0.031	0.392
Land holding in hectares	0.336	0.371	0.364	0.112
Lactating dairy cows owned in numbers	0.569^c	0.150	0.000	0.189
Distance to nearest market in kilometres	− 0.192^c	0.069	0.005	− 0.064
On-farm income in Ethiopian birr	9.98e−07	1.98 e−05	0.960	3.32e−07
Non-farm income in Ethiopian birr	1.7e−05	3.97e−05	0.668	5.66e−06
Access to market information	1.400^c	0.526	0.008	0.445
Access to credit service	0.872	0.533	0.102	0.313
Membership in dairy cooperative	1.022^a	0.541	0.059	0.369
Constant	− 4.515	1.880	0.016
Number of obs = 150 LR chi² (13) = 158.44 Prob > chi² = 0.0000 Log likelihood = − 20.86588 Pseudo R² = 0.7915

Source: author’s computation from sample survey data (2020). 1 USD = 39.5 Ethiopian birr
^a, ^b, and ^c significant at 10%, 5%, and 1%, respectively