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Table 3

Description of the independent variables and controls

VariableDescriptionAbbreviationValuationDefinition of valuation
Panel A: Independent variables 
 (1) Use first flush to remove the initial rainwater OM1 1–5 1: <5 min
2: 5–10 min
3: 10–15 min
4: 15–20 min
5: 20–30 min 
 (2) Use strainers OM2 0–1 0: Use strainer
1: No use 
 (3) Clean the RW reservoir OM3 1–4 1: Every 2 years
2: Every year
3: Biannual
4: Every quarter 
 (4) Clean the catchment roofs and guttering channels OM4 1–6 1: Every year
2: Biannual
3: Every 2 months
4: Every month 
Panel B: Controls 
 (1) Household size Size 1–6 1: 1 member
2: 2 members
3: 3 members
4: 4 members
5: 5 members
6: 6 members 
 (2) Age group of household head Age 1–5 1: 20–30 years old
2: 30–40 years old
3: 40–50 years old
4: 50–60 years old
5: >60 years old 
 (3) Education level Edu 1–4 1: Primary
2: Secondary
3: High school
4: College/university 
VariableDescriptionAbbreviationValuationDefinition of valuation
Panel A: Independent variables 
 (1) Use first flush to remove the initial rainwater OM1 1–5 1: <5 min
2: 5–10 min
3: 10–15 min
4: 15–20 min
5: 20–30 min 
 (2) Use strainers OM2 0–1 0: Use strainer
1: No use 
 (3) Clean the RW reservoir OM3 1–4 1: Every 2 years
2: Every year
3: Biannual
4: Every quarter 
 (4) Clean the catchment roofs and guttering channels OM4 1–6 1: Every year
2: Biannual
3: Every 2 months
4: Every month 
Panel B: Controls 
 (1) Household size Size 1–6 1: 1 member
2: 2 members
3: 3 members
4: 4 members
5: 5 members
6: 6 members 
 (2) Age group of household head Age 1–5 1: 20–30 years old
2: 30–40 years old
3: 40–50 years old
4: 50–60 years old
5: >60 years old 
 (3) Education level Edu 1–4 1: Primary
2: Secondary
3: High school
4: College/university 
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