Table 6.

Summary of parameters used in the CBA model.

Parameter	Distribution	Parameter representing	Source
T, t1 and t2	Non-random	The response function	Expert survey
Yi0	Non-random	Yield for Business as usual practice	Household survey. The mean of observation with business as usual practice before CSA is adopted
Yimax	Random triangular	Maximum yield associated with the CSA practice	Expert survey.
Pi	Non-random	Market price per unit at the farm level	Household survey. The mean price received by farmers
(implementation cost)j	Random best fit the data	The implementation cost of CSA practice j	Household survey
(maintenance cost)j	Random best fit the data	The maintenance cost of CSA practice j	Household survey. The annual maintenance cost associated with each practice
Increases in external effects	Non-random	Quantity of external effect produced by the implementation of CSA practice	Expert survey
Shadow prices	Random uniform	Estimation of the value of one unit of the external effects affected by the implementation of CSApractice	Expert survey

NB: To establish the distributions, @risk software was applied to the survey data.

N/a represents not applicable.