Accounting for Timing when Assessing Health-Related Policies.

Area of Science:

• Health economics
• Project evaluation
• Cost-benefit analysis

Background:

• Accurate discounting of project effects over time is crucial for robust economic evaluations.
• Existing methods may embed multiple arguments within discounting policies, complicating analysis.
• Project impacts often span different countries, necessitating context-specific assessments.

Purpose of the Study:

• To offer guidance on analyzing and appropriately discounting time streams of project effects.
• To establish a common framework for parameter assessment in cost-effectiveness and benefit-cost analyses.
• To guide the quantification and conversion of diverse effects into equivalent health, cost, or consumption units.

Main Methods:

• Developing a framework to identify common parameters for assessing time streams of effects.
• Quantifying and converting different types of effects into standardized units (health, cost, consumption).
• Suggesting default assumptions and discussing evidence for key parameters.

Main Results:

• A unified approach to discounting avoids embedding multiple arguments in policy.
• Identifies relevant evidence, current knowledge, and areas for strengthening parameter assessment.
• Recommends extensive reporting to allow exploration of alternative assumptions and future updates.

Conclusions:

• The proposed framework enhances the transparency and accuracy of economic evaluations.
• Country-specific net present values are recommended for projects with international effects.
• This approach facilitates more reliable project appraisal and decision-making in diverse contexts.