From: Household demand and supply for clean groundwater in the Mekong Delta, Vietnam
Characteristic | Mean | Min. | Max. | S.D. |
Non-GSU users | ||||
 Age (in years) | 48 | 17 | 82 | 13.5 |
 Education levela | 3 | 1 | 5 | 0.86 |
 Number of years of residence | 32 | 1 | 79 | 16.65 |
 Number of family members | 5 | 1 | 12 | 1.87 |
 Income per month (million VND) | 3.27 | 0.25 | 25.0 | 3.72 |
GSU users | ||||
 Age (in years) | 45 | 17 | 86 | 14.8 |
 Education levela | 3 | 1 | 5 | 0.81 |
 Number of years of residence | 31 | 1 | 85 | 17.14 |
 Number of family members | 5 | 1 | 12 | 1.62 |
 Income per month (million VND) | 2.28 | 0.25 | 14.0 | 1.75 |
GSU managers | ||||
 Age (in years) | 43 | 19 | 69 | 12.55 |
 Education levela | 3 | 2 | 5 | 0.77 |
 Designed capacity (number of households) | 157 | 90 | 450 | 65.67 |
 Number of years GSU established (up to 2006) | 3 | 1 | 7 | 1.71 |