Research Article
Analyzing Potato Market Participation, Market Surplus, and Market Outlet Choice on Small Farm Household Level in Lemo District, Southern Ethiopia
Table 4
Results of the robust Heckman second-stage selection model for potato market surplus.
| Variable | Coefficient | Stand error | Z |
| Age of household head | −.0420 | .179 | −0.23 | Education level of household head | 1.714 | .534 | 3.21 | Sex of household head | 1.446 | 5.139 | 0.28 | Member of cooperative | 12.356 | 4.628 | 2.67 | Distance to the nearest market | −.082 | .055 | −1.49 | Adult equivalent | 1.957 | 1.015 | 1.93 | Effect of remittances | −3.890 | 3.565 | −1.09 | Total crop land size | 13.667 | 13.667 | 3.56 | Own transportation facilities | 1.199 | 3.093 | 0.39 | Oxen owned by a farmer (oxen) | 13.821 | 3.735 | 3.70 | Types of seed they used | 8.514 | 3.237 | 2.63 | Frequency of extension contact | 1.439 | 1.507 | 0.96 | Lagged market price | 13.110 | 4.127 | 3.18 | Constant | −61.998 | −14.447 | −4.29 | Mills lambda (λ) | 27.967 | 10.895 | 2.57 | Rho | 1 | | | Sigma | 19.804 | 1.931 | | Lambda | 19.804 | 1.931 | |
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Note., , and show significance at 1, 5, and 10%, respectively. |