Correct Answer: B. Cost-benefit analysis
Cost-benefit analysis (CBA) is the economic evaluation method that explicitly quantifies and compares both costs and benefits in monetary terms. Unlike cost-effectiveness analysis, which measures outcomes in natural units (e.g., cost per DALY averted, cost per life-year saved), CBA converts all health and non-health outcomes into rupees or other currency units. This allows direct comparison of diverse interventions and determination of net benefit (benefits minus costs). In India, CBA is particularly useful for policy decisions where multiple sectors compete for limited budgets—for example, comparing a vaccination program's monetary benefit against a water sanitation project. The key discriminator is that CBA requires monetization of health outcomes (using willingness-to-pay, human capital approach, or revealed preference methods), whereas CEA accepts outcomes in natural units. CBA answers the question "Is this intervention worth doing?" by calculating benefit-cost ratio or net present value, making it the standard tool for resource allocation decisions in Indian health planning when monetary valuation is the priority.
Why the other options are wrong
A. Cost-effective analysis — Cost-effectiveness analysis (CEA) measures outcomes in natural units (QALYs, DALYs, life-years saved) rather than monetary terms. While CEA compares cost per unit of health outcome, it does not monetize the benefit itself. This is the most common trap—students confuse CEA with CBA because both are economic evaluations, but CEA explicitly avoids monetary valuation of health outcomes, making it unsuitable for measuring monetary benefit. C. Input-Output analysis — Input-output analysis is a macroeconomic technique that measures the flow of goods and services between different sectors of the economy, not health outcomes. It is used for intersectoral economic planning and does not directly measure health benefits or costs. This option is a distractor that confuses economic analysis with health economic evaluation. D. Network analysis — Network analysis is a project management tool (PERT/CPM) used to identify critical paths, resource dependencies, and project timelines—not to measure monetary benefits of health interventions. While it may be used in health program planning for scheduling, it has no role in economic evaluation or benefit quantification.
High-Yield Facts
- Cost-benefit analysis converts all health and non-health outcomes into monetary units (rupees), allowing direct comparison across diverse sectors.
- Cost-effectiveness analysis measures outcomes in natural units (DALYs, QALYs, life-years) and does NOT monetize benefits—key distinction from CBA.
- Benefit-cost ratio (BCR) in CBA: if BCR > 1, benefits exceed costs; used for go/no-go decisions in Indian health policy.
- Monetization methods in CBA include human capital approach (lost earnings), willingness-to-pay, and revealed preference—required to measure monetary benefit.
- CBA is preferred when comparing across sectors (health vs. transport vs. education) because all outcomes are in rupees; CEA is preferred for within-health comparisons where natural units suffice.
Mnemonics
CBA vs CEA: Money vs Metrics CBA = Cost-Benefit = Benefits in rupees (Monetary). CEA = Cost-Effectiveness = Effectiveness in natural units (DALYs, QALYs). Use when you see 'monetary' → think CBA; when you see 'per DALY' → think CEA. BCR Rule: Break-Even at 1 Benefit-Cost Ratio > 1 means go ahead. If BCR = 2, every rupee spent returns 2 rupees in benefit. This is the hallmark of CBA—only CBA produces a ratio of monetary benefit to monetary cost.
NBE Trap
NBE pairs "cost-effective analysis" with "economic evaluation" to lure students who conflate all economic methods. The trap is that both CEA and CBA are economic evaluations, but only CBA measures benefit in monetary terms—CEA explicitly avoids monetization and uses natural units instead.
Clinical Pearl
In Indian health policy, when the Ministry of Health must decide whether to fund a new cancer screening program versus a maternal health initiative, CBA is used to convert both into rupees (using willingness-to-pay or human capital methods) so they can be directly compared. CEA would only compare cost per life-year within each program separately, not across them.
_Reference: Park's Textbook of Preventive and Social Medicine, Ch. 8 (Health Planning and Management); Gupta & Sharma, Health Economics and Policy in India_