We study the fiscal consequences of large military buildups. To do so, we assemble the Global Budget Database, a comprehensive dataset of disaggregated central government finances for 20 countries from 1870 to 2022. We identify 114 episodes of military spending booms, in peace and war, and...

• Europe must urgently strengthen its defence capabilities and secure strategic autonomy to avoid vulnerability to external pressures. • The proposal outlines a European Future of Defence Architecture focusing on next generation military technologies and strategic enablers (like AI, cyber,...

This note responds to the comments by Garbellini (2026) on the treatment of demand shocks in the Input-Output model in Stamegna et al. (2024). We show that the increase in arms expenditure is correctly identified as an investment shock, while increases in public expenditure on environmental...

This study revisits the long-standing debate on the guns-versus-butter phenomenon, that spending on military activity crowds out non-military expenditure. By focusing on Africa, we conjecture the crowding-out effect of military expenditure on health expenditure beyond government health...

Germany is facing a security policy Zeitenwende whose industrial dimension has not yet been sufficiently addressed. The war in Ukraine, rising military threats in Europe, and the long-term underfunding of the German Armed Forces have exposed the limits of existing defence industrial capacity,...

US defence policy is characterised by contradictions that are on display once again in the Trump administration’s latest strategy documents. The reasons for this go far beyond the president’s erratic behaviour. At the core lies the unanswered question of how the United States should deal...

Europa muss seine Militärausgaben deutlich erhöhen, aber wie? Diese Frage beantworten wir mit einem Blick in die Geschichte. Wie haben Regierungen in der Vergangenheit in ähnlichen Situationen reagiert? Wie wurden Aufrüstung und Kriege typischerweise finanziert - durch Schulden, Steuern oder...

Europe must rapidly increase its military spending, but how? We collect 150 years of data to study what governments in similar situations have done. How were past military buildups financed? What was the relative importance of debt financing, budget cuts, and taxes? Our main finding is that...

Various options are being discussed to increase Germany's defense capabilities. Increasing the size of the Bundeswehr is proving difficult, and compulsory military service hardly seems feasible for economic and socio-political reasons. A European army and technological alternatives such as...

Europe can no longer rely on the United States for its defence but is currently lacking essential capabilities to assure security itself. European countries should not give up on NATO but seek to close capability gaps by developing the European defence industrial base. The EU can play an...

The design of an operationally and militarily prepared Bundeswehr of the future requires the consideration of multiple facets. Its operation requires reliable access to economic resources (labour, capital, land) and their efficient management. This completely addresses the contradiction between...

The reduction in defense spending, often referred to as the “peace dividend,” from 2.7 % to 2.8 % of Germany’s GDP in the late 1980s to just 1.2 % of GDP by the end of the 2010s, has led to a near-complete loss of defense capability over more than 30 years. Given the current global...

Die Koalitionssondierungen haben zu einer Einigung bei der Finanzierung von Infrastruktur und Rüstung geführt. Diese sieht vor, die Schuldengrenze im Grundgesetz bestehen zu lassen und sie zugleich mithilfe von kreditfinanzierten Sondervermögen bzw. Ausnahmeklauseln zu umgehen. Das wirft die...

The member states of the European Union are once again arguing about money. More specifically, they are arguing about how much they want to spend on defence, where this money should come from and whether they should spend it jointly. That Europe needs to defend itself better is not in dispute in...

Civil wars often erode state sovereignty, as institutions are replaced or co-opted by armed groups that establish informal governance structures. Among these, rebel taxation emerges as a key tool for financing wartime activities and administering territories. We explore whether rebel taxation...

European security is in danger. Despite some successes, overall progress in strengthening defences has been slow. Europeans still face critical shortfalls in areas such as long-range strike, air defence, intelligence and surveillance. Without more coordination, Europeans will waste much of their...

This study endeavours to investigate the effect of military expenditure on economic growth in ten major countries of the world, which collectively contributed 75.2 per cent to global military expenditure in 2022. The period of study is 30 years, from 1992 to 2022, determined solely based on the...

Research background: At the NATO Wales Summit in 2014, European allies agreed to spend at least 2% of GDP on defence.1 However, the break-out of the Russo-Ukrainian war increased EU countries efforts to spend more on military capability not only because of solidarity in the alliance, but also as...

We provide the first global, long-run analysis of how governments fund and de-fund military spending. Constructing a panel of 167 countries from 1817 to 2024, we estimate fiscal responses to armaments and disarmaments, including wartime shifts. Deficit spending is the primary financing policy,...

The aim of this study is to analyze the effects of terrorism on gender inequality in politics for a panel of 180 countries over the period 2000-2020. Using generalized method of moments in a system, the results obtained reveal that terrorism reduces women's political representation, thereby...

In 2024, total defence expenditure by the 27 EU Member States reached €343 billion, marking a 19% increase from 2023, bringing defence expenditure to 1.9% of GDP. Estimated data suggests that Member States may reach beyond the 2% NATO guideline in 2025, to €392 billion (current prices,...

In 2024, total defence expenditure by the 27 EU Member States reached €343 billion, marking a 19% increase from 2023, bringing defence expenditure to 1.9% of GDP. Estimated data suggests that Member States may reach beyond the 2% NATO guideline in 2025, to €392 billion (current prices,...

National defence is a quintessential public good which generates welfare but does not have a market price to be used for its valuation. This study uses non-market valuation, namely a discrete choice experiment, to enhance the understanding of how individuals' perceptions of threat influence...

Using a short- and long-term macroeconomic forecasts, we estimate the cost of the Russian full-scale invasion of Ukraine for countries in Eastern Europe, Caucasus, and Central Asia. Shortly after the Russian attack, the projected cost (cumulative over six years) stood at $2.44 trillion for the...

Expanding military personnel and expenditure depends on public support and social legitimacy. Crisis events such as 9/11 and the 2014 annexation of Crimea have influenced public attitudes toward military investment, with support intensifying significantly after Russia's full-scale invasion of...

Operational autonomy should be achieved through developing integrated command systems, rather than simply procuring weapons: great powers direct operations. Direct deterrence must be achieved through investments in conventional forces, which can reduce but not replace reliance on US nuclear...

Research & development (R&D) subsidies, especially defense R&D spending, raise private R&D investment (a crowd-in effect). Public R&D funding increases employment without driving up wages. Supported industries see gains in productivity. International spillovers amplify the impact across...

This paper investigates the expansion of EU military activities, involving the European Commission, other EU-related institutions and Member States. Expenditure on EU military programmes - defence-related R&D, arms production, joint procurement, military mobility, and the supply of lethal...

This report updates and expands the data-driven work of our initial study from September 2024, which concluded that Europe would only be fit for war in several decades. We show that the situation today is even more concerning if Europe aims to be fit for war by 2030. First, Russia continues to...

Europe faces a dual crisis of growing security threats and declining economic competitiveness. Increased defence spending offers an opportunity to address both challenges. Through initiatives such as ReArm Europe and NATO's 5% pledge, EU Member States are committing substantial resources to...

Europe faces a dual crisis of growing security threats and declining economic competitiveness. Increased defence spending offers an opportunity to address both challenges. Through initiatives such as ReArm Europe and NATO's 5% pledge, EU Member States are committing substantial resources to...