THE FUTURE OF UK DEFENCE RESEARCH

Developments within the UK in the Ministry of Defence’s policy on defence equipment acquisition demand changes in the scale and allocation of the Ministry’s budget for defence research. To facilitate the national debate on those changes, this paper reviews the key questions about UK defence research which the Ministry must resolve in order to implement its new Defence Technology Strategy.     

Rent‐seeking models of international competition: An experimental investigation*

This paper experimentally tests a number of hypotheses that follow from models of international competition that are based on Tullock style rent‐seeking models. Specifically, we designed and performed experiments to see how variations in the degree of publicness in the prize as well as changes in the values assigned to the prize affect alliances in terms of individual nation contributions, total contributions, burden sharing, and the likelihood of winning the prize. While there was substantial variation in individual behavior, the results of the experiments generally conform to the theoretical predictions of the rent‐seeking model of international competition and alliances.     

The National Movement for the Liberation of Azawad factor in the Mali crisis

Mali has been a battleground for more than a year now. While the armed conflict came in the aftermath of the Libyan crisis that left the regional security environment depleted, it also served as a catalyst for the collapse of state authority in Mali. This created conditions conducive for the proliferation of, and attacks by, radical religious armed groups in the northern regions of the country, including the Tuareg armed movement: the National Movement for the Liberation of Azawad (MNLA). But, far from being a new phenomenon, the Tuareg-led armed insurrection in the northern regions is as old as the post-colonial Malian state, and continues to pose tremendous challenges in West Africa and the Sahel region for both regional and extra-regional actors. The recent crisis in the Sahel region is seen as one of the most serious since the end of the Cold War, with anticipated dire long-term impacts on the security of the region and beyond. While attention is predominantly focused on defeating the jihadist groups that have threatened the survival of the Malian state, one must not lose sight of the fact that the ‘Tuareg Factor’, as represented by the rebellion launched by MNLA, remains critical both in terms of appreciating the deterioration of the situation and attempting to frame long-lasting solutions. The paper argues that the Tuareg's persistent recourse to rebellion against Bamako needs to be understood within a historical trajectory that takes into consideration three key parameters: firstly, the post-colonial state in Mali and its African leadership's relations with the descendants of the Tuareg communities; secondly, the amalgamation created by the so-called war on terror; and, finally, the contradictions of the democratisation process of the 1990s.¹1 This article is based on field research carried out between 2008 and 2013 on the ‘Resurgence of Tuareg-led Rebellions’.     

GLOBALIZING REAGAN'S INF TREATY

When it was concluded more than a quarter century ago, the Intermediate-Range Nuclear Forces (INF) Treaty between the United States and the Soviet Union was hailed as a disarmament watershed, eliminating entire classes of nuclear missiles from the arsenals of the arms-racing Cold War superpowers. Over the intervening decades, there have been repeated calls to convert this legacy treaty into a new international norm against nuclear and missile proliferation by broadening it into a global prohibition on ground-launched ballistic and cruise missiles with ranges between 500 and 5,500 kilometers. Indeed, variations on this proposal have been knocking around for so long and with so little success that the entire concept has come to be dismissed by many knowledgeable insiders as something of a farce. Looking beyond its inauspicious pedigree, however, this viewpoint suggests that the time is opportune for Washington to give the idea a fresh look. Drawing on a detailed review of the history of “Global INF” and an analysis of the contemporary context, the author recommends that the Obama administration consider a simple declaratory approach that promises modest initial benefits, avoids previous and foreseeable pitfalls, and plausibly lays a solid foundation for achieving significant long-term progress.     

Securing a border under asymmetric information

We study a stochastic interdiction model of Morton et al. IIE Transactions, 39 (2007):3–14 that locates radiation sensors at border crossings to detect and prevent the smuggling of nuclear material. In this model, an interdictor places sensors at customs checkpoints to minimize a potential smuggler's maximum probability of crossing a border undetected. We focus on a model variant in which the interdictor has different, and likely more accurate, perceptions of the system's parameters than the smuggler does. We introduce a model that is tighter and uses fewer constraints than that of Morton et al. We also develop a class of valid inequalities along with a corresponding separation procedure that can be used within a cutting‐plane approach to reduce computational effort. Computational results demonstrate the effectiveness of our approach.Copyright © 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 91–100, 2014     

Information in two-stage programming under uncertainty

The random variables in two-stage programming under uncertainty are generally treated in a passive manner in that no information regarding the random variables or the process generating the random variables may be obtained. This paper develops the economics of information for the case in which the probability distributions are discrete. A multinomial process is assumed to generate the random variables, and the parameter vector of that process is assumed to be unknown. A Dirichlet prior distribution on the parameter vector is used, and the computation of the value of information thus involves a Dirichlet-multinomial distribution on the random variables. An example involving producing to meet uncertain demands is presented.     

Use of dimensionless ratios to determine minimum-cost inventory quantities

The iteration usually necessary for simultaneous determination of minimum-cost order quantity and reorder point in (Q, r) inventory systems may be eliminated by a graphical technique employing dimensionless ratios. This technique is illustrated for three different types of stock-out penalty.