Table 5 Determinants of WTP premium for the iron-enriched bean variety in Guatemala—random effects model, right-censored model and interval-censored model
Random effect model (1) | Right censored model (Tobit) (2) | Interval censored model (3) | |
|---|---|---|---|
Information once | 0.36 (0.29) | 0.94*** (0.57) | 0.41** (0.17) |
Information repetition | − 1.17 (0.20) | − 0.10 (0.40) | 0.18 (0.15) |
Variety delivery order | − 0.28** (0.12) | − 0.49** (0.0.24) | − 0.43** (0.17) |
Men × information once | 0.07 (0.27) | 0.02 (0.55) | 0.43 (0.30) |
Men × Information repetition | 0.38** (0.16) | 0.80*** (0.29) | 0.35 (0.26) |
IRI × information once | − 0.26** (0.12) | − 0.43* (0.23) | − 0.12 (0.12) |
IRI × Information repetition | 0.13*** (0.04) | 0.18** (0.09) | − 0.11 (0.09) |
Education × information once | − 0.04 (0.03) | − 0.18*** (0.07) | − 0.04 (0.03) |
Education × information repetition | 0.05 (0.03) | 0.08 (0.07) | − 0.02 (0.03) |
Variety delivery order × information once | 0.53** (0.22) | 0.05** (0.04) | 0.62** (0.24) |
Variety delivery order × information repetition | − 0.00 (0.00) | − 0.02 (0.01) | 0.32 (0.26) |
Male | 0.03 (0.16) | 0.23 (0.31) | − 0.27 (0.19) |
Age | − 0.00 (0.00) | − 0.02*** (0.01) | − 0.01** (0.00) |
Area planted with beans in 2013 | 0.00*** (0.00) | 0.00*** (0.00) | 0.00 (0.00) |
Produce beans frequently | − 0.07 (0.12) | − 0.28 (0.25) | 0.03 (0.12) |
Amount of beans stored at home | 0.00 (0.00) | 0.02** (0.01) | 0.00 (0.00) |
Purchase beans frequently | − 0.02 (0.05) | 0.05 (0.11) | − 0.01 (0.03) |
Consume beans frequently | − 0.00 (0.03) | 0.00* (0.07) | 0.04 (0.02) |
Poverty index | 0.04 (0.11) | 0.31 (0.22) | 0.37* (0.21) |
Food frequency index | − 0.00*** (0.00) | − 0.02*** (0.01) | − 0.00 (0.00) |
Monthly expenses | 0.00 (0.00) | 0.00 (0.00) | 0.00 (0.05) |
Have met any people in the community | 0.02 (0.05) | 0.07 (0.10) | − 0.21 (0.15) |
Have heard about iron in food | − 0.22 (0.15) | − 0.40 (0.30) | 0.45 (0.36) |
_cons | 0.39 (0.34) | 1.66** (0.70) | − 0.05 (0.04) |
N | 359 | 359 | 359 |
Likelihood-ratio test for heteroscedasticity (Prob > chi2) | 0.14 | 0.23 | 0.18 |
F statistic/Chi2 | 0.00 | 0.00 | 0.00 |
Prob > F/Prob>Chi2 | 89.52 | 106.07 | 30.53 |
R-squared | 0.14 | 0.13 | 0.13 |
AIC | 1350 | 1420 |