H Heuristics Polycrisis Resilience Series

Research Report · November 2026

Preventive Development Economics

Closing development deficits before they become crises

Hunter Hughes, Founder of H Heuristics

  • Preventive development
  • Development deficits
  • Benefit-cost returns
  • Cost of delay
  • Clean cooking and cooling
  • Infrastructure and digital development
  • Prevention appraisal
  • Research agenda to 2035

Abstract

Many of the most damaging human, economic, and environmental crises do not emerge in isolation. Their severity is shaped by pre-existing development deficits that leave populations exposed to risk. This report introduces Preventive Development Economics (PDE), a conceptual framework developed by Hunter Hughes that treats development as a mechanism of prevention. The framework argues that investments in foundational services such as electricity, clean cooking, water, sanitation, immunization, education, and digital connectivity generate dual returns: improving living standards while simultaneously reducing future vulnerability to interconnected risks.

Using public data across more than 200 economies, the report examines how development deficits cluster, how they relate to outcomes such as child mortality, life expectancy, hunger, and fertility, and whether stronger foundations are associated with improved long-term development trajectories. The analysis finds that countries with stronger foundational coverage generally experience better human-development outcomes and, in many cases, faster long-term progress, although results vary across indicators and do not establish causation. The report also evaluates the economics of preventive investment, reviews evidence across applications including clean cooking, cooling, infrastructure, clean industrialization, and digital development, and proposes decision-making tools such as prevention-adjusted appraisal frameworks and investment screening methods.

The findings suggest that closing development deficits before crises occur can provide substantial economic and social returns while reducing exposure to future shocks. At the same time, the report acknowledges important limitations, including reliance on observational evidence and uneven strength across applications. Preventive Development Economics is presented not as a replacement for conventional development, resilience, or risk-reduction frameworks, but as an integrating approach that connects them through a common logic: development investments can function as proactive risk reduction. The report concludes with a research agenda and roadmap designed to test, refine, and operationalize the framework over the coming decade.

Many damaging crises land on gaps that development left open years earlier; closing those deficits first prevents harm and builds prosperity at the same time.

Core proposition, H Heuristics

Key findings

  1. Development deficits are also vulnerability. Missing clean cooking, power, safe water, internet, immunization or schooling both reduce living standards and worsen the damage of floods, heatwaves, price shocks and pandemics. Closing them early earns two returns from one investment.
  2. Deficits cluster, and outcomes worsen with each one. Across 202 economies, 4.6 billion people live in countries short on at least one of seven foundations and 2.1 billion on three or more. Child mortality is about 11 times higher in countries short on five to seven services (58 per 1,000 births) than in countries short on none (5).
  3. Reported returns are high but slow. Published benefit-cost ratios for preventive investments run from about 2:1 to 16:1, with paybacks of about 4 to 27 years, which helps explain why prevention is under-supplied.
  4. The test is partial, and the report says so. Countries with stronger foundations in 2000 grew faster and cut child mortality faster afterwards, but the link weakens once regions are held fixed, and foundations did not cushion the GDP shocks of 2009 and 2020. The report states that associations are not proof of cause.
  5. Delay is costly. At proven peer pace, unmet needs across five services fall from 6.7 billion to 1.8 billion by 2050; a five-year delay forfeits 34% of the gain and a ten-year delay 62%. These are benchmark scenarios, not forecasts.
  6. From concept to decision tools. The report offers a prevention-adjusted appraisal, a screen for ranking investments, budget tagging (only about 8 cents of prevention per dollar of response aid in 2015–24), seven falsifiable research questions and a roadmap to 2035.

Contents

  1. Executive Summaryp. 4
  2. 1What Preventive Development Economics Isp. 6
  3. 2The Vulnerability Stackp. 11
  4. 3The Economics of Preventionp. 15
  5. 4Six Core Principlesp. 19
  6. 5Household Protection: Clean Cooking and Coolingp. 22
  7. 6Systems Protection: Infrastructure, Clean Industrialisation and Digital Developmentp. 24
  8. 7Does Prevention Show Up in the Data?p. 27
  9. 8Timing, Demography and the Window for Preventionp. 31
  10. 9Decision Rules, Institutions and Financep. 34
  11. 10Intersections: Bundles, Gates and the Household Stackp. 37
  12. 11Limits, Harmful Twins and What Would Prove the Idea Wrongp. 39
  13. 12Research Agenda and Roadmap to 2035p. 41
  14. 13Data and Method Notesp. 44
  15. Referencesp. 46

Section links open the PDF at the corresponding page in a new tab.

Glossary

Preventive Development Economics (PDE)
The study of how closing development deficits early (clean cooking, electricity, safe water, sanitation, immunization, schooling, internet) both raises living standards and reduces vulnerability to future shocks, so that one investment earns a development return and a prevention return.
Development deficit
A country's coverage of a basic service falling below 80%. Sensitivity checks at 60% and 90% are reported.
Vulnerability stack
The number of development deficits (0 to 7) a country has across seven foundations: electricity, clean cooking, basic drinking water, basic sanitation, internet use, DPT3 immunization and primary completion.
Foundations Index
The simple average of coverage across the seven foundation indicators, requiring at least five of seven and capping coverage at 100%.
Person-years of unmet need
A count of each person without a service for each year, used to measure the cost of delay.
Prevention-adjusted appraisal
A benefit-cost appraisal that counts both the development return and the prevention return of an investment.
Prevention screen
A ranking tool for preventive investments, alongside budget tagging that tracks money as a share of response spending.

How to cite

Hughes, H. (2026). Preventive Development Economics: Closing development deficits before they become crises (Polycrisis Resilience Series No. 49). H Heuristics. https://doi.org/10.6084/m9.figshare.34991710

BibTeX 
@techreport{hughes2026preventive,
  title = {Preventive Development Economics: Closing development deficits before they become crises},
  author = {Hughes, Hunter},
  institution = {H Heuristics},
  type = {Research Report},
  series = {H Heuristics Polycrisis Resilience Series},
  number = {49},
  year = {2026},
  month = nov,
  doi = {10.6084/m9.figshare.34991710},
  url = {https://doi.org/10.6084/m9.figshare.34991710},
  copyright = {CC BY-NC-ND 4.0},
  keywords = {preventive development economics, development deficits, vulnerability, prevention, clean cooking, cooling, infrastructure, clean industrialization, digital development, benefit-cost analysis, Century Pathways, H Heuristics}
}

Download citation: BibTeX (.bib) · RIS (.ris) · https://doi.org/10.6084/m9.figshare.34991710

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