Non-parametric regression results for Kenya with county dummies
| Variable | Av. Marginal effect | z-statistic | p-value |
|---|---|---|---|
| Head rice ratio | 0.06 (0.14) | 0.44 | 0.659 |
| Length-width ratio | 0.55 (0.55) | 0.99 | 0.322 |
| Amylose content | −0.32 (0.12) | −2.80 | 0.005 |
| Peak viscosity | 0.0002 (0.0003) | 0.68 | 0.499 |
| Impurities | −10.91 (5.61) | −1.95 | 0.052 |
| Kericho | 1.47 (0.86) | 1.71 | 0.087 |
| Kisumu | 1.30 (0.88) | 1.47 | 0.141 |
| Embu | 0.87 (0.87) | 1.00 | 0.318 |
| Taita Taveta | 1.00 (0.82) | 1.22 | 0.224 |
| Mombasa | 1.94 (1.54) | 1.26 | 0.207 |
| Kirinyaga | 0.82 (0.96) | 0.85 | 0.393 |
| Busia | 1.67 (0.93) | 1.80 | 0.072 |
| Nakuru | 1.14 (0.90) | 1.27 | 0.204 |
| Variable | Av. Marginal effect | ||
|---|---|---|---|
| Head rice ratio | 0.06 (0.14) | 0.44 | 0.659 |
| Length-width ratio | 0.55 (0.55) | 0.99 | 0.322 |
| Amylose content | −0.32 (0.12) | −2.80 | 0.005 |
| Peak viscosity | 0.0002 (0.0003) | 0.68 | 0.499 |
| Impurities | −10.91 (5.61) | −1.95 | 0.052 |
| Kericho | 1.47 (0.86) | 1.71 | 0.087 |
| Kisumu | 1.30 (0.88) | 1.47 | 0.141 |
| Embu | 0.87 (0.87) | 1.00 | 0.318 |
| Taita Taveta | 1.00 (0.82) | 1.22 | 0.224 |
| Mombasa | 1.94 (1.54) | 1.26 | 0.207 |
| Kirinyaga | 0.82 (0.96) | 0.85 | 0.393 |
| Busia | 1.67 (0.93) | 1.80 | 0.072 |
| Nakuru | 1.14 (0.90) | 1.27 | 0.204 |
Note(s): Dependent variable is price in constant international dollars. Figures in parentheses are robust standard errors. N = 227. The reference county is Nairobi. The estimated average marginal effects are averages of derivatives for continuous variables and averages of contrasts (differences) in the case of dummy variables (StataCorp, 2019)
Source(s): Authors' work