Technical and environmental efficiency of smallholder palm oil and rubber production [thesis]

Holtkamp Anna Mareike
A.3 Estimation results: STATA output of the oil palm autochtone frontier including the z -variables; plot size (x1 ), hours of labour per plot (x2 ), plantation age (x3 ), cost of fertilizer (x4 ).
doi:10.53846/goediss-6422 fatcat:ah7ozcvpjveyhep6ie3j6yf2ti