Table 3 Descriptive statistics of the variables used.
From: Measuring operational and quality-adjusted efficiency of Chilean water companies
Variables | Unit of measurement | Mean | Std. Dev. | Minimum | Maximum |
|---|---|---|---|---|---|
Volume of water delivered | m3 per year | 50,856 | 92,398 | 991 | 473,846 |
Customers receiving wastewater treatment | Nr per year | 735,230 | 1,292,820 | 3563 | 6,497,126 |
Operating expenditure | 000 s CLP per year | 31,854,033 | 41,930,089 | 635,228 | 210,144,159 |
Employees | nr per year | 630 | 758 | 22 | 3375 |
Volume of water leakage | m3 per year | 16,469 | 28,750 | 127 | 142,922 |
Water supply unplanned interruptions | Hours per year | 4034 | 6474 | 3 | 34,051 |
Customer density | nr per km | 57.06 | 14.64 | 18.43 | 89.24 |
Source of water | Categorical | 1.38 | 0.72 | 0.00 | 2.00 |
Ownership | Categorical | 0.62 | 0.58 | 0.00 | 2.00 |
