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Table 1 Variables used in the models and their hypothesized effects on the use of CSP

From: Productivity and food security effects of using of certified seed potato: the case of Kenya’s potato farmers

Variables Description of variable Hypothesized effect
useCSP If the farmer plants/uses CSP (1 = yes, 0 = otherwise) Dependent variable
age Respondent’s age measured in years ±
gender Gender of the farmer (1 = male; 0 = otherwise) ±
occupation Occupation of the farmer (1 = full time, 0 = otherwise)  
education number of years of formal schooling  
hhdsize Number of household members
distagric Distance to the nearest agricultural office in walking minutes
distkisima Distance from the residence of the farmer to Kisima Farm in kilometers
credit If the farmer had access to credit (1 = yes; 0 = otherwise) ±
land Size of land (hectares) the farmer had before adopting CSP ±
asset Value of physical assets in USD +
phone If the farmer owns a mobile phone (1 = yes; 0 = otherwise) ±
memgrp If the farmer is a member of a farmer organization (1 = yes; 0 = otherwise) +
ε The stochastic term  
Measures of the effect of use of CSP (outcome variables)
 fungicide Value of purchased fungicide (USD/ha)
 insecticide Value of purchased insecticide (USD/ha)
 yield Potato yield (kg/ha) +
 fertilizer Value of purchased fertilizer (USD/ha) ±
 foodsec HFIAP score