## Wars Impose Lasting Economic Costs, While More Defense Spending Means Hard Choices _IMF Blog, April 8, 2026_ ## Source details **Canonical URL:** [Wars Impose Lasting Economic Costs, While More Defense Spending Means Hard Choices](https://www.imf.org/en/blogs/articles/2026/04/08/wars-impose-lasting-economic-costs-while-more-defense-spending-means-hard-choices) ## Other formats - [Markdown version](/en/blogs/articles/2026/04/08/wars-impose-lasting-economic-costs-while-more-defense-spending-means-hard-choices/index.md) - [Structured JSON version](/en/blogs/articles/2026/04/08/wars-impose-lasting-economic-costs-while-more-defense-spending-means-hard-choices/index.json) - [Bundle manifest](/en/blogs/articles/2026/04/08/wars-impose-lasting-economic-costs-while-more-defense-spending-means-hard-choices/bundle-manifest.json) ## Bibliographic details - Authors: Hippolyte Balima, Andresa Lagerborg, Evgenia Weaver - Published: April 8, 2026 --- ### Overview - Wars and rising defense spending are reshaping policy priorities and macroeconomic outcomes globally. - Research summarized from two analytical chapters of the April 2026 World Economic Outlook: “Defense Spending: Macroeconomic Consequences and Trade-Offs,” and “The Macroeconomics of Conflicts and Recovery.” - Geographic focus and most-affected regions: sub-Saharan Africa, Europe, and the Middle East. ### Economic losses (effects of conflicts) - At conflict onset, output in countries where fighting takes place falls by about 3 percent and continues falling for years. - Cumulative output losses reach roughly 7 percent within five years. - Output losses from conflicts typically exceed those associated with financial crises or severe natural disasters. - Economic scars persist even a decade later. - Spillovers: neighboring economies or key trading partners often experience modest declines in output in the early years of a conflict. - Definition of major conflicts in the analysis: those involving at least 1,000 battle-related deaths. - Major-conflict dynamics: - Government budgets deteriorate as spending shifts toward defense and debt increases. - Output and tax collection collapse. - Imports contract sharply because of lower demand; exports decrease even more substantially, producing a temporary widening of the trade deficit. - Heightened uncertainty triggers capital outflows; both foreign direct investment and portfolio flows decline. - Wartime governments rely more heavily on aid and, in some cases, remittances from citizens abroad to finance trade deficits. - Sustained exchange rate depreciation, reserve losses, and rising inflation occur. - Prices tend to increase at a pace higher than most central banks’ inflation targets, prompting monetary authorities to raise interest rates. - Overall conclusion: major conflicts impose substantial economic costs and difficult trade-offs on economies within their borders and hurt other countries, with enduring consequences for economic potential and human well-being. ### Spending trade-offs (effects of rising defense spending) - Episodes studied: large buildups in defense spending in 164 countries since the Second World War. - Typical characteristics of defense spending booms: - Duration: typically last nearly three years. - Size: increase defense spending by 2.7 percentage points of gross domestic product. - Comparable benchmark: “broadly similar to what is required by North Atlantic Treaty Organization (NATO) members to reach the 5 percent of GDP defense spending target by 2035.” - Aggregate macro effects: - Ramping up defense spending primarily acts as a positive demand shock, boosting private consumption and investment, especially in defense-related sectors. - Short-term raises in both economic output and prices; requires close coordination with monetary policy to temper inflationary pressures. - Aggregate effects on output are likely modest: increases in defense spending typically translate almost one for one into higher economic output. - Multipliers vary widely depending on how outlays are sustained, financed, allocated, and how much equipment is imported. - Specific trade-offs and channels: - Output gains are smaller and external balances deteriorate when stimulus is partly spent on imported goods (especially for arms importers). - Buildups that prioritize public investment in equipment and infrastructure, less fragmented procurement, and more common standards can: - expand market size, - support economies of scale, - strengthen industrial capacity, - limit import leakages, - support long-term productivity growth. - Financing choices and fiscal consequences: - Defense spending booms are mostly deficit-financed in the near-term; higher revenues play a larger role in later years and when the buildup is expected permanent. - Near-term deficit financing can stimulate the economy but strain fiscal sustainability over the medium term. - Empirical fiscal impacts: - Deficits worsen by about 2.6 percentage points of GDP within three years of the start of a boom. - Public debt increases by about 7 percentage points within three years of the start of a boom (14 percentage points in wartime). - Higher public debt can crowd out private investment and offset initial expansionary effects. - Mitigation options: - Durable financing arrangements when the increase is permanent. - Raising revenues (cost: reducing consumption and dampening demand boost). - Re-ordering budget priorities (cost: reductions in spending on social protection, health, and education). ### Policies for recovery (post-conflict recovery and policy recommendations) - Recovery speed and pattern: - Recoveries are often slow and uneven and crucially depend on the durability of peace. - When peace is sustained, output rebounds but often remains modest relative to wartime losses. - In fragile economies with renewed conflict, recoveries frequently stall. - Recovery driven primarily by labor (reallocation from military to civilian activities and gradual return of refugees); capital stock and productivity remain subdued. - Key policy measures to restore confidence and promote recovery: - Early macroeconomic stabilization. - Decisive debt restructuring. - International support, including aid and capacity development. - Domestic reforms to rebuild institutions and state capacity, promote inclusion and security, and address lasting human costs (lost learning, poorer health, diminished economic opportunities). - Policy design principles: - Comprehensive and well-coordinated policy packages are far more effective than piecemeal measures. - Policies that simultaneously reduce uncertainty and rebuild the capital stock can: - reinforce expectations, - encourage capital inflows, - facilitate the return of displaced people. - Ultimate objective: successful post-war recovery should lay the foundation for stability, renewed hope, and improved livelihoods for communities affected by conflict. *Source: Hippolyte Balima, Andresa Lagerborg, Evgenia Weaver; April 8, 2026.* --- ## Content in this bundle - **Chapter 2** - [Chapter 2 (Markdown version)](/-/media/files/publications/weo/2026/april/english/ch2.pdf.md){rel="alternate" type="text/markdown"} - [Chapter 2 (PDF)](/-/media/files/publications/weo/2026/april/english/ch2.pdf){rel="external" type="application/pdf"} - **Chapter 3** - [Chapter 3 (Markdown version)](/-/media/files/publications/weo/2026/april/english/ch3.pdf.md){rel="alternate" type="text/markdown"} - [Chapter 3 (PDF)](/-/media/files/publications/weo/2026/april/english/ch3.pdf){rel="external" type="application/pdf"} --- ## References - [World Economic Outlook](https://www.imf.org/en/publications/weo/issues/2026/04/14/world-economic-outlook-april-2026) - [How Fragile States Can Gain by Strengthening Institutions and Core Capacities](https://www.imf.org/en/blogs/articles/2026/03/18/how-fragile-states-can-gain-by-strengthening-institutions-and-core-capacities) _Source: https://www.imf.org/en/blogs/articles/2026/04/08/wars-impose-lasting-economic-costs-while-more-defense-spending-means-hard-choices_