The Brides of Boko Haram: Economic Shocks, Marriage Practices, and Insurgency in Nigeria

Marriage markets in rural Nigeria are characterised by bride price and polygamy. These customs may diminish marriage prospects for young men, causing them to join militant groups. Using an instrumental variables strategy, I find that marriage inequality increases civil conflict in the Boko Haram insurgency. To generate exogenous shocks to the marriage market, I exploit the fact that young women delay marriage in response to favourable pre-marital economic conditions, which increases marriage inequality primarily in polygamous villages. The same shocks that increase marriage inequality and extremist violence also lead women to marry fewer and richer husbands, generate higher average marriage expenditures, and increase insurgent abductions. The results shed light on the marriage market as an important driver of violent extremism.

When can cultural selection explain adaptation?

Cultural selection models aim to explain cultural phenomena as the products of a selective process, often characterising institutions, practices, norms or behaviours as adaptations. I argue that a lack of attention has been paid to the explanatory power of cultural selection frameworks. Arguments for cultural selection frequently depend on demonstrating only that selection models can in principle be applied to culture, rather than explicitly demonstrating the explanatory payoffs that could arise from their application. Understanding when and how cultural selection generates powerful explanations is crucial to evaluating cultural selection, as well as realising its promised epistemic and practical benefits. I argue that the ability for cultural selection to explain ‘design without a designer’ is crucial to successful and powerful cultural selection explanations. I introduce the strategy of comparing cultural selection to goal-directed agent accounts in order to evaluate when cultural selection can provide distinctive explanatory payoffs, drawing on two case studies to illustrate the benefits of this strategy. I argue that a focus on phenomena which cannot be explained through intention or agency-based explanations in particular could provide a fruitful avenue to identifying the cases where cultural selection can be insightfully applied.

Detecting damage in rudder stocks under load using electro-mechanical susceptance: Frequency-warping and semi-supervised approaches

Active piezoelectric transducers are successfully deployed in recent years for structural health monitoring using guided elastic waves or electro-mechanical impedance (EMI). In both domains, damage detection can be hampered by operational/environmental conditions and low-power constraints. In both domains, processing can be divided into approaches (i) taking into account baselines of the pristine structure as reference, (ii) ingesting an extensive measurement history for clustering to explore anomalies, (iii) incorporating additional information to label a state. The latter approach requires data from complementary sensors, learning from laboratory/field experiments or knowledge from simulations which may be infeasible for complex structures. Semi-supervised approaches are thus gaining popularity: few initial annotations are needed, because labels emerge through clustering and are subsequently used for state classification. In our work, bending and combined bending/torsion studies on rudder stocks are considered regarding EMI-based damage detection in the presence of load. We discuss the underpinnings of our processing. Then, we follow strategy (i) by introducing frequency warping to derive an improved damage indicator (DI). Finally, in a semi-supervised manner, we develop simple rules which even in presence of varying loads need only two frequency points for reliable damage detection. This sparsity-enforcing low-complexity approach is particularly beneficial in energy-aware SHM scenarios.

The Populist Communication Strategy in Comparative Perspective

Populism has captured the world's attention, especially during election campaigns where the starkness of populist messages comes into sharper focus. While most research focuses either on the content that actors communicate or their delivery of that content, I situate my research among the few studies that do both. I refer to this combination as a communication strategy. I evaluate two research questions: how is the populist communication strategy used and how do the communication strategies of populist and non-populist actors differ? To assess these questions, I collect original data during five national elections that occurred between 2018 and 2019: Mexico, Colombia, Brazil, Italy, and Spain ( N = 1,577). I measure different elements of communication strategies, including both content and style, in the Tweets of national-level candidates. I find stark differences in communication styles in both what actors talk about and how they convey their messages. This finding suggests that how actors convey their ideas is critical to advancing our understanding of actors’ overall communication strategies.

Success Indicators Influencing Choice Between Born Global and Born Regional Approach

This paper explores the differences between born global firms and born regional firms. It compares performance between born regional firms and born global firms within the same industry. This paper would investigate three independent variables which are: firm performance, firm size, and model on a company’s strategy. I argue that despite key success indicators being almost similar in both born global firms and born regional firms, there exist some unique commonality in born global firms that are not evident in born regional firms, and vise-versa. This uniqueness motivates them to internationalize quicker than born regional firms. This paper would contribute to IB research by explaining the motivations behind behaviors of international venture firms Keywords: Born global firms, Born regional firms, international venture firms, Internationalization, resource based theory, stakeholder theory, shareholder theory

Incentive and Coordination in the Two-Sided Market: Evidence from the P2P Lending Market

Two-sided markets serve as information intermediaries by connecting participants on both sides. In this study, we focus on the coordination of participants in the P2P lending market using a coupon strategy as an incentive to attract investment. Using a two-sided market model, we find that when a platform adopts the coupon strategy, (i) the platform utility and participants’ utility are both greater and (ii) the number of participants is greater. In addition, as most research on two-sided markets and coupon strategy focuses on theoretical models, our study provides empirical support using data from Renrendai.com over 2018 to 2019.

EXPRESS: The Logic of Strategic Entrepreneurship

In this essay I attempt to clarify the construct of strategic entrepreneurship from a new angle. By comparing the ideal-type theory of strategy without entrepreneurship with the ideal-type theory of entrepreneurship without strategy, I shed light on what it means to combine the logics of entrepreneurship and strategy and illustrate the value of their complementarity. Entrepreneurship is blind without strategy and strategy is paralyzed without entrepreneurship. I further argue that many proponents of strategic entrepreneurship and action-based theories of strategy have prematurely given up on the idea of sustained competitive advantage. Disequilibrium and uncertainty do not automatically mean that no predictable and stable patterns can be relied upon for sustained competitive advantage.

What Can a Song Bring? Balancing Out the Picture in Pandemic

How might we personally and collectively contain the burnout and emotional depletion that has arisen as a consequence of COVID-19? For some, the pandemic has been a further stressor on top of pre-existing trauma. Under these circumstances, how can we continue our work of intervening into the challenges and demands that face our communities? Here, I turn to a song – called It’s Alright – written and sung not only as a response, but also as a survival strategy. I try to let its sentiments and sensations wash over me to calm my nervous system. I sing it as a way to self-soothe, to stabilise. I sing it with and for you, on the chance it might be of service.

Risk Stratification in Cost-Effectiveness Analyses of Cancer Screening: Intervention Eligibility, Strategy Choice, and Optimality

Introduction There is increasing interest in risk-stratified approaches to cancer screening in cost-effectiveness analysis (CEA). Current CEA practice regarding risk stratification is heterogeneous and guidance on the best approach is lacking. This article suggests how stratification in CEA can be improved. Methods I use a simple example of a hypothetical screening intervention with 3 potential recipient risk strata. The screening intervention has 6 alternative intensities, each with different costs and effects, all of which vary between strata. I consider a series of alternative stratification approaches, demonstrating the consequences for estimated costs, effects, and the choice of optimal strategy. I supplement this analysis with applied examples from the literature. Results Adopting the same screening policy for all strata yields the least efficient strategies, where efficiency is understood as the volume of net health benefit generated across a range of cost-effectiveness threshold values. Basic stratification that withholds screening from lower-risk strata while adopting a common strategy for those screened increases efficiency. Greatest efficiency is achieved when different strata receive separate strategies. While complete optimization can be achieved within a single analysis by considering all possible policy combinations, the resulting number of strategy combinations may be inconveniently large. Optimization with separate strata-specific analyses is simpler and more transparent. Despite this, there can be good reasons to simulate all strata together in a single analysis. Conclusions If the benefits of risk stratification are to be fully realized, policy makers need to consider the extent to which stratification is feasible, and modelers need to simulate those choices adequately. It is hoped this analysis will clarify those policy and modeling choices and therefore lead to improved population health outcomes.

Schellenberg's Noseeum Assumption about Nonresistant Nonbelief

In this article, I outline a strategy for challenging J.L. Schellenberg’s hiddenness argument, and specifically the premise within the argument that asserts the existence of what Schellenberg calls nonresistant nonbelief. Drawing on some of the philosophical resources of skeptical theism, I show how this premise is based on a particular “noseeum assumption”—what I call Schellenberg’s Noseeum Assumption—that underwrites a particular “noseeum argument.” This assumption is that, regarding putative nonresistant nonbelievers, more likely than not we’d detect these nonbelievers’ resistance toward God if there were any. I give reasons for thinking that it is not more reasonable to affirm than to refrain from affirming Schellenberg’s Noseeum Assumption, and so reason to think that the hiddenness argument is not a good argument for atheism. I also defend the strategy I outline against several objections.