Table 1 Summary statistics for variables included in the Stochastic frontier production and technical inefficiency models for cage culture
From: A stochastic frontier analysis of technical efficiency of fish cage culture in Peninsular Malaysia
Variable name | Definition | Measurement | Summary statistics | |||
|---|---|---|---|---|---|---|
Mean | SD | Min | Max | |||
Output and input variables | Â | Â | Â | |||
 Y | Cage fish production per cycle | (kg m−2) | 9.4 | 27.5 | 0.02 | 232 |
 X1 | Fish fry | (pieces m−2) | 48.8 | 109.8 | 0.29 | 619 |
 X2 | Feed | (kg m−2) | 58.6 | 211.9 | 0.03 | 1332 |
 X3 | Labour (own and hired) | (days m−2) | 1.8 | 3.2 | 0.02 | 21.3 |
 X4 | Energy (fuel) | (litre m−2) | 19.2 | 42.3 | 0.00 | 241.9 |
 X5 | Utility (operational) | (USD m−2) | 6.9 | 10.8 | 0.00 | 68.8 |
 X6 | Others (maintenance) | (USD m−2) | 0.5 | 0.6 | 0.00 | 3.1 |
Farm specific variables | ||||||
 Z1 | Age | (year) | 48 | 11 | 28 | 78 |
 Z2 | Education | (year) | 8 | 4 | 0 | 19 |
 Z3 | Experience | (year) | 7 | 7 | 1 | 33 |
 Z4 | Production cycle | (number) | 1.7 | 0.88 | 1 | 5.5 |
 Z5 | Cage area | (m−2) | 1127 | 1847 | 36 | 11,250 |