Cost-benefit analysis: dealing with the problems of indivisible projects and fixed budgets

Area of Science:

• Health Economics
• Decision Analysis
• Public Health Policy

Background:

• Healthcare decision-making often involves appraising multiple projects under budget constraints.
• Traditional cost-benefit analysis (CBA) methods face challenges when dealing with indivisible projects.
• The suitability of existing CBA techniques for fixed-budget scenarios requires critical examination.

Purpose of the Study:

• To evaluate the appropriateness of cost-benefit analysis (CBA) methods for option appraisals in healthcare.
• To identify limitations of benefit-cost ratios and net benefit methods when facing indivisible projects and fixed budgets.
• To propose improvements for maximizing benefits within overall budget constraints.

Main Methods:

• Analysis of benefit-cost ratio and net benefit methods in the context of indivisible projects.
• Examination of the impact of erroneous cost and benefit specification on project efficiency.
• Modeling the influence of budget constraints on resource shadow prices and project selection.

Main Results:

• Benefit-cost ratios are sensitive to the specification of costs and benefits, potentially misclassifying project efficiency.
• Ignoring budget constraints can lead to the selection of projects that appear efficient but are not.
• The shadow price of resources is affected by remaining budget, altering project efficiency rankings.

Conclusions:

• Standard benefit-cost ratio and net benefit methods are inadequate for healthcare option appraisals with indivisible projects and fixed budgets.
• Accurate specification of costs and benefits, and explicit consideration of budget constraints, are crucial for efficient resource allocation.
• Evaluating alternative uses of residual resources is essential to maximize overall budget benefits.