Table 9 Multinomial endogenous treatment effects model estimates
From: IITA’s genebank, cowpea diversity on farms, and farmers’ welfare in Nigeria
Explanatory variables | Outcome models | ||
|---|---|---|---|
Ln cowpea yield | Ln cowpea consumption | Ln cowpea sale | |
Treatment variable | |||
Adoption of cowpea variety without genebank ancestry | − 1.545** (0.781) | 0.186 (0.205) | − 0.578 (1.025) |
Adoption of cowpea variety with genebank ancestry | 1.019*** (0.395) | 0.381*** (0.095) | − 0.027 (0.158) |
Household characteristics | |||
Age | − 0.018 (0.022) | 0.012 (0.010) | 0.001 (0.035) |
Age2 | 0.000 (0.000) | − 0.000 (0.000) | − 0.000 (0.000) |
Sex | 0.735*** (0.238) | 0.081 (0.101) | − 0.116 (0.258) |
Education | 0.007 (0.025) | − 0.013 (0.010) | 0.017 (0.041) |
Education2 | 0.000 (0.002) | 0.000 (0.001) | − 0.002 (0.003) |
Need credit | 0.385*** (0.109) | 0.059 (0.045) | − 0.631*** (0.132) |
Farm characteristics | |||
Size | − 0.172*** (0.031) | 0.065*** (0.015) | − 0.000 (0.021) |
Slope | 0.041 (0.056) | − 0.044* (0.025) | 0.105 (0.071) |
Distance to farm | − 0.006*** (0.002) | 0.001 (0.001) | 0.003 (0.002) |
Soil fertility | − 0.335** (0.151) | − 0.134** (0.067) | 0.133 (0.220) |
Market characteristics | |||
Distance to village market | − 0.003*** (0.001) | − 0.000 (0.000) | − 0.004*** (0.001) |
Distance to district market | − 0.001* (0.001) | 0.000 (0.000) | 0.000 (0.001) |
Constant | 3.111*** (0.620) | 0.822*** (9.264) | 5.399*** (0.909) |
Selection terms \((\lambda )\) | |||
Adoption of cowpea variety without genebank ancestry | 0.958** (0.480) | − 0.419*** (0.156) | 0.000 (0.000) |
Adoption of cowpea variety with genebank ancestry | − 1.194*** (0.457) | − 0.419*** (0.109) | − 0.000 (0.000) |
Prob > chi2 | 0.000 | 0.000 | 0.000 |
N | 1442 | 1376 | 500 |