anchor: For the Alternative Estimate, a cost-of illness value is used in place of willingness-to-pay to reflect uncertainty about the value of reductions in incidences of chronic bronchitis.
positive: In order to reflect uncertainty about the value of reductions in incidences of chronic bronchitis in the Alternative Estimate the cost-of-illness value is used.
negative: The willingness-to-pay value is still used to reflect uncertainty about the value of reductions in incidences of chronic bronchitis in the Alternative Estimate.