Table 2 Definition of explanatory variables supposed to determine the adoption of biogas technology, and their presumed signs in association with dependent variables
From: Determinants of biogas technology adoption in southern Ethiopia
| Variable | Type | Description | Expected sign |
|---|---|---|---|
| Sex (Sexhhh) | Categorical | Sex of household head: male = 1; female = 0 | ± |
| Age (Agehhh) | Continuous | Age of the household head in years | ± |
| Education (Educhhh) | Continuous | Household head’s educational level in years of schooling | + |
| Household size (Sizehh) | Continuous | Total number of people in the household | ± |
| Head of cattle (Catthds) | Continuous | Household’s total number of cattle in cow equivalenta | + |
| Total income (Tincomhh) | Continuous | Total annual income of the household in Birrb | + |
| Access to credit (Accredit) | Categorical | Having access to credit = 1; otherwise = 0 | + |
| Farmland size (Sizfarmh) | Continuous | Household’s total farmland owned in hectare (ha) | + |
| Number of planted Trees (Numplant) | Continuous | Household’s total number of planted trees | ± |
| Distance to firewood source (Distwood) | Continuous | Walking distance of the major fuelwood source from home (min) | + |
| Distance to water source (Distwatr) | Continuous | Walking distance to the major water source from home (min) | − |
| Adequacy of available water (Suffwatr) | Categorical | Having adequate water source = 1; otherwise = 0 | + |
| Distance to market (Distmrkt) | Continuous | Walking distance of the market from home (min) | − |
| Perception to use & mgt (Indivperc) | Categorical | Having perception resisting biogas technology = 1; otherwise = 0 | − |
| Access to electricity (Accelect) | Categorical | Having electricity connection = 1; otherwise = 0 | − |
| Electronic media (Elemedia) | Categorical | Having radio and/or television = 1; otherwise = 0 | + |