Table 3. Predicted outcomes from an economic analysis comparing four further strategic options considered for the National Pest Management Strategy. Values include national expenditure in the first year and over a 55-year-time frame, net present value (NPV) over the first 30 years relative to an ad hoc option, and estimated time to achieve eradication of tuberculosis. All costs are in NZ$ million, using an 8% discount rate without inclusion of a terminal value (data from Anonymous 2009b).

Option	Year 1 expenditure ($)	Total 55 year expenditure ($)	NPV over 30 years ($)	Time to eradicate (years)
Sustained control, no roll back	67	3,204	−228.5	Not achieved
Sustained control after roll-back	73	2,650	−246.7	Not achieved
Slow eradication	76.9	2,263	−128.7	45
Fast eradication	92.7	1,804	−128.8	30