Table 3 SUR Probit estimation results of household-level determinants of adoption of major potato varieties (marginal effects and standard errors)
From: The curious case of C-88: impacts of a potato variety on farmers in Yunnan, China
| C88 | Hui-2 | Weiyu-3 | Mira | Xuanshu-2 | Qingshu-9 | Lishu-7 | Others | |
|---|---|---|---|---|---|---|---|---|
| # of working age farmers |
0.0643*** (0.018) |
− 0.0112 (0.020) |
0.0099 (0.014) |
− 0.0200 (0.016) |
− 0.0006 (0.017) |
− 0.0218 (0.016) |
− 0.0037 (0.013) |
− 0.0110 (0.022) |
| Avg. age of working age farmers |
0.0028* (0.002) |
− 0.0021 (0.002) |
0.0007 (0.001) |
0.0006 (0.001) |
0.0008 (0.001) |
0.0028** (0.001) |
0.0008 (0.001) |
0.0017 (0.002) |
| Avg. yrs of education of working age farmers |
0.0101** (0.005) |
− 0.0231*** (0.006) |
0.0099** (0.005) |
− 0.0017 (0.005) |
− 0.0048 (0.005) |
0.0036 (0.004) |
0.0065** (0.003) |
0.0061 (0.006) |
| Dummy: 1 if a household is a member of a farmer organization |
0.1323*** (0.044) |
− 0.2031*** (0.038) |
− 0.0783 (0.050) |
− 0.0981 (0.070) |
0.1665*** (0.057) |
0.0354 (0.026) |
0.2893*** (0.070) | |
| Dummy: 1 if a household is visited by extension agents in the last year |
0.1117*** (0.033) |
− 0.1191*** (0.035) |
0.0134 (0.031) |
− 0.0392 (0.033) |
0.0000 (0.000) |
0.0560* (0.029) |
− 0.0254 (0.020) |
− 0.0286 (0.037) |
| Share of household farmland allocated to potato |
0.0449 (0.051) |
0.1785*** (0.063) |
− 0.1239* (0.069) |
− 0.1366** (0.061) |
0.0802 (0.057) |
0.1380*** (0.048) |
0.0569 (0.036) |
− 0.0247 (0.064) |
| Household farm size (mu) |
0.0018* (0.001) |
0.0000 (0.000) |
− 0.0037 (0.003) |
0.0005* (0.000) |
0.0023 (0.002) |
0.0005** (0.000) |
0.0008** (0.000) |
0.0007 (0.000) |
| Share of self-kept seed in the total quantity of potato seed |
0.0379 (0.034) |
0.0751** (0.034) |
− 0.0796*** (0.027) |
0.1378*** (0.025) |
− 0.0682** (0.030) |
0.0169 (0.026) |
− 0.0439* (0.025) |
0.0012 (0.039) |
| # of households in village |
− 0.0001 (0.000) |
− 0.0015*** (0.000) |
− 0.0003 (0.000) |
0.0010*** (0.000) |
0.0005*** (0.000) |
0.0005*** (0.000) |
− 0.0012 (0.001) |
− 0.0001 (0.000) |
| Village average farm size per HH (mu) |
0.0037* (0.002) |
− 0.0038 (0.003) |
− 0.0329*** (0.010) |
0.0188*** (0.004) |
− 0.0042 (0.004) |
0.0051* (0.003) |
0.0153*** (0.004) |
0.0002 (0.002) |
| Village total potato area (mu) |
0.0002*** (0.000) |
0.0000 (0.000) |
− 0.0002 (0.000) |
− 0.0010*** (0.000) |
0.0000 (0.000) |
− 0.0004*** (0.000) |
− 0.0004*** (0.000) |
0.0000 (0.000) |
| Dummy: 1 if village experienced serious disease problem in past 5 years |
− 0.0843** (0.033) |
0.0281 (0.040) |
− 0.1030*** (0.036) |
0.1194*** (0.040) |
0.0000 (0.000) |
0.0047 (0.035) |
− 0.1555*** (0.025) |
0.0259 (0.041) |
| Dummy: 1 if village experienced serious pest problem in past five years |
− 0.2890*** (0.018) |
− 0.1070*** (0.033) |
0.2739*** (0.038) |
0.0134 (0.030) |
0.0000 (0.000) |
− 0.0811*** (0.024) |
− 0.1294*** (0.017) |
− 0.0429 (0.038) |
| Distance from village to city town (km) |
− 0.0010*** (0.000) |
− 0.0014*** (0.000) |
0.0002 (0.000) |
0.0020*** (0.000) |
0.0002 (0.000) |
0.0007*** (0.000) |
− 0.0017** (0.001) |
0.0000 (0.000) |
| Distance from village to county town (km) |
0.0028*** (0.001) |
0.0023*** (0.000) |
− 0.0026*** (0.001) |
− 0.0013*** (0.000) |
0.0001 (0.000) |
0.0013*** (0.000) |
− 0.0046** (0.002) |
− 0.0005 (0.001) |