| Variable Name | Description |
|---|---|
| Output (Y) | Tomato output in kilograms |
| Input variables (Xis) | |
| Farm size (X1) | Farm, the size used by the farmer, in hectares |
| Fertilizer (X2) | Fertilizer, the quantity applied in kilograms |
| Labor (X3) | Labor, quantity in hours |
| Seeds (X4) | Seeds amount applied, in kilograms |
| Water (X5) | Water, quantity in cubic meters |
| Electricity (X6) | Electric bill, the amount in Omani Rials |
| Chemicals (X7) | Chemicals amount applied in kilograms |
| Farm-Specific Variables | |
| Farmer’s age (Z1) | Age, number of years |
| Farmer’s experience (Z2) | Farmer’s experience, number of years |
| Farmer’s education dummy (Z3) (Z4)† |
Value = 1 if the number of years of education is below 12; 0 otherwise Value = 1 if the number of years of education is above 12; 0 otherwise |