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Table 2 Description of the independent variables used to explain the probability of adopting biogas technology

From: Returns, setbacks, and future prospects of bio-energy promotion in northern Ethiopia: the case of family-sized biogas energy

Name of the variable Nature of the variable Hypothesized relationship with the dependent variable (biogas adoption) Description of the variable
Age Continuous Positive/negative Age of the household head in years
Sex Dummy Positive/negative Sex of the household head; a dummy variable for gender relationships (male = 1, female = 0)
Family size Continuous Positive/negative Family size of the household
Education Continuous Positive Education level of the household head in years
Cattle holding Continuous Positive Number of cattle owned by the household (heads/hh)
Annual income Continuous Positive Annual income of the household in ETB
DistFire Continuous Positive Distance to nearest firewood collection site in kilometer
DistWater Continuous Negative Distance to nearest permanent water point in kilometer
DistMarket Continuous Positive/negative Distance to nearest market in kilometer
Availability of electricity Dummy Negative Availability of modern fuels mainly electricity (yes = 1, otherwise = 0)
Farm size Continuous Positive Total size of farm plots owned and operated by the household in Tsimad
Fertility status Categorical Positive/negative Fertility status of farm plot (1 = poor, 2 = medium, 3 = good)
Farm location Continuous Negative Distance between house and farm of the household in kilometer
Extension service Continuous Positive Frequency of contacts between agricultural extension worker and the household (frequency in a year)