We study how Europe could replace US support for Ukraine both (i) financially, in terms of the fiscal effort required, and (ii) militarily, in terms of weapon production. Financial effort: The financial challenge of replacing US aid is limited. Currently, European governments are spending just...

This paper presents the “Ukraine Support Tracker”, which lists and quantifies military, financial and humanitarian aid to Ukraine in the context of the Russia-Ukraine war. This fourth version covers government commitments made between January 24 and June 7, 2022 and has a new detailed...

This paper introduces the “Ukraine Support Tracker”, which lists and quantifies military, financial and humanitarian aid to Ukraine since Russia’s invasion on February 24, 2022. We measure support from Western governments, namely by G7 and European Union member countries. Due to our focus...

This paper presents the “Ukraine Support Tracker”, which lists and quantifies military, financial and humanitarian aid to Ukraine in the context of the Russia-Ukraine war. This second version covers the period January 24 until April 23, 2022. We measure support from Western governments,...

This paper presents the “Ukraine Support Tracker”, which lists and quantifies military, financial and humanitarian aid to Ukraine in the context of the Russia-Ukraine war. This third version covers government commitments between January 24 and May 10, 2022. We now track support by 37...

This paper presents the “Ukraine Support Tracker”, which lists and quantifies military, financial and humanitarian aid to Ukraine in the context of the Russia-Ukraine war. This sixth version covers government commitments made between January 24 and August 3, 2022 and has a new detailed...

Following Russia’s attack on Ukraine on February 24, 2022, Western countries have been providing military assistance to Ukraine. However, relative to GDP, the support from the small Baltic and Nordic countries has been greater than that of the larger European NATO countries. This article...

We present a model of transnational terrorism where two countries, home and foreign, face a terrorist threat based in the foreign country. The home country chooses how much to invest in defending itself or in reducing terrorist resources either indirectly by subsidising the foreign country or by...

We investigate the effect of U.S. military aid and U.S. troop deployments on anti-American terrorism, using a sample of 106 countries between 1986 and 2011. We find that greater military commitment leads to more anti-American terrorism. We study the underlying mechanisms using a mediation...