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We explore how information from covariates can be incorporated into the CUSUM-based real-time monitoring procedure for explosive asset price bubbles developed in Homm and Breitung (2012, Journal of Financial Econometrics 10, 198–231). Where dynamic covariates are present in the data generating process (DGP), the false positive rate (FPR) of the basic CUSUM procedure, which is based on the assumption that prices follow a univariate DGP, under the null of no explosivity will not, in general, be properly controlled, even asymptotically. In contrast, accounting for these relevant covariates in the construction of the CUSUM statistics leads to a procedure whose FPR can be controlled using the same asymptotic crossing function as employed by Homm and Breitung (2012). Doing so is also shown to have the potential to significantly increase the chance of detecting an emerging bubble episode in finite samples. We additionally allow for time-varying volatility in the innovations driving the model through the use of a kernel-based variance estimator.
Egalitarianism and prioritarianism are competing views about the ethics of distribution. Both views have wide scopes of concern. But, writing in this journal, Michael Otsuka has discovered a case that seems to show an interesting asymmetry between the limits of egalitarian and prioritarian concern. In that case, intuitively one outcome is better than another (in a respect relevant to the ethics of distribution); prioritarianism can recover that intuitive judgment; but egalitarianism seems unable to recover it. I show, however, that egalitarianism can recover the intuitive judgment in question on a well-motivated basis. That result is of interest because it shows the possibility and prima facie plausibility of a version of egalitarianism with a surprisingly wide scope of concern – one according to which it matters that some are worse off than those who (merely) could have existed.
This study explores the intricate design of title pages in nineteenth-century Persian lithographed books, comparing the Eastern-style title pages prevalent in Indian publications with the Western-influenced designs found in Iranian lithographed books. Rooted in Indian publishing traditions, the Eastern model emphasised structured bibliographic details, refined calligraphy, and floral ornamentation. In contrast, the Western-style Iranian model drew inspiration from Persian manuscript and bookbinding traditions, a broader ornamental vocabulary shared across media, particularly the lachak va turanj (medallion-and-corner) compositional scheme. While Iranian designers rarely adopted the Eastern model in books published in Iran, Indian publications occasionally incorporated Persian design elements, demonstrating selective cross-regional exchanges in Persianate book design. Rather than developing a standardised informational layout, Iranian title pages prioritised visual composition and ornamental hierarchy, often relegating bibliographic information to colophons or extended dedicatory texts. Accordingly, the Western style is defined less by informational structure than by visual organisation, which distinguishes it fundamentally from the Eastern model. This study focuses on Iranian and Indian examples, drawing on rare Persian lithographed books to examine how differing conceptions of the book shaped title page design in the nineteenth century.
In July of 2024, signatures for placing an anti-gerrymandering initiative on the November ballot were certified by the Ohio Secretary of State. The proposed initiative would have replaced a bipartisan redistricting commission with a citizens’ redistricting commission. Though the initiative ultimately failed, polls leading up to the general election showed Ohioans strongly supported redistricting reform. Using a survey of likely voters in Ohio, the research presented here identifies the factors that explain support for redistricting reform. While there is a strong body of research on redistricting, this research is unique because the survey data come from likely voters during an actual redistricting campaign. The findings show that identifying threats to democracy as the most important election issue, awareness of the redistricting issue, identification with the Democratic Party, and liberal ideology are all positively associated with support for redistricting reform. The findings demonstrate how voters are influenced by partisanship on salient issues and how issue awareness interacts with partisanship to determine support for redistricting. This article concludes with a discussion of the context of the ballot initiative in Ohio.
Cet article se propose de revenir sur la question de la reproduction sociale au sein des institutions universitaires françaises au début du xxe siècle à partir de l’exemple du célèbre historien Marc Bloch (1886-1944), normalien dont le père, Gustave Bloch (1848-1923), fut lui-même non seulement normalien mais également professeur à l’École normale supérieure. La question se pose en des termes spécifiques en un temps où l’ENS perdit son autonomie pour devenir un institut pédagogique intégré à l’université de Paris : Marc Bloch fut donc à la fois un pur produit de l’ENS et de l’Université et il eut toujours à cœur de nourrir sa pratique professionnelle avec cette double culture. En s’appuyant sur les nombreuses archives que sa formation à l’ENS a laissées, il est possible de comprendre comment se déroulait la formation d’un historien à l’ENS à l’époque de Marc Bloch, comment la personnalité de ce dernier s’y est peu à peu affirmée en s’appuyant sur certaines dispositions propres à un héritier intellectuel, et d’observer de quelle manière cet héritage normalien a pu être plus ou moins activé pendant l’ensemble de son parcours d’historien et de citoyen.
In this article we introduce a gluing operation on dimer models. This allows us to construct dimer quivers on arbitrary surfaces. We study how the associated dimer and boundary algebras behave under the gluing and how to determine them from the gluing components. We also use this operation to construct homogeneous dimer quivers on annuli.
This article examines the hybrid network structure of the global sustainability governance system, focusing on the evolving relationships between private transnational regulators (PTRs) and intergovernmental organizations (IOs). We argue that a defining feature of this structure is the mutual dependence between PTRs and IOs: PTRs invoke public international law instruments (PILIs) – and, by extension, the authority of the IOs behind them – to bolster their own authority and to enhance the normative force of the standards they promulgate. IOs rely on PTRs to disseminate their norms within corporate settings, thereby strengthening their compliance capacities. This interdependence carries significant synergistic potential. We examine the grounding relationship between PTRs and PILIs/IOs through extensive network analysis based on a specially curated dataset comprising 55 PTRs, 393 private standards, 261 PILIs (including treaties, conventions, and declarations), and 41 IOs. Citation patterns within this network support our thesis. We also offer tentative evidence regarding the second prong of our model and outline directions for future research. Finally, we assess the vulnerabilities of this interdependent structure, highlighting the fragility of the global sustainability legal order in the face of rising nationalism and anti-multilateralist pressures.
In Denver area census tracts during the years 2016–2019, the rate of carbapenem-resistant enterobacterales (CRE) infection increased by 10% for every 0.1 unit increase in Social Vulnerability Index (RR 1.10, 95% CI 1.06, 1.14). This finding suggests that community factors may influence risk of healthcare-associated infections such as CRE.
Blended-wing-body (BWB) aircraft with distributed propulsion offers significant potential for aerodynamic efficiency. However, this tightly integrated configuration inherently operates under boundary layer ingestion (BLI) conditions. The ingested thick fuselage boundary layer, coupled with the strong aerodynamic interactions between the S-shaped intake and wing, generates adverse pressure gradients at the inlet alongside low total pressure recovery coefficients and high outlet distortion. This study investigates integrated flow control under high-altitude flight conditions using a BWB aerofoil integrated with a semi-embedded S-shaped intake model, incorporating energy analysis. During cruise, strong adverse pressure gradients between the wing shock wave and intake cause distinct lip separation, resulting in a low total pressure recovery coefficient and high distortion. Distributed dual-row suction generates secondary flow generates distributed secondary flow near the separation point with equivalent energy consumption. This enhances fuselage boundary layer mixing, reduces near-wall adverse pressure gradients and improves the total pressure recovery coefficient. The integration of internal jet control synergistically augments the benefits of external wing suction via distinct spatial mechanisms: central jets replenish core flow kinetic energy to suppress separation and improve the total pressure recovery coefficient, while side jets enhance mixing between separation zones and mainstream flow, mitigating secondary swirl losses and substantially reducing distortion at the aerodynamic interface plane (AIP). Energy analysis confirms that a modest energy input (equivalent to 7.4% of the mainstream kinetic energy) yields a significant increase in intake thrust, while simultaneously reducing total pressure and swirl distortion.
This article presents a new flow feature observed behind a rectangular wing in water: the breakdown of the wing-tip vortex induced by the temporary injection of air into the vortex core downstream of the wing. For certain combinations of Reynolds number and angle of attack, a stationary air bubble is trapped in the core at some distance from the wing and can persist for several minutes after the injection is stopped. For other parameter values, the bubble drifts downstream or upstream until it reaches the wing, or it disintegrates immediately. Measurements of the vortex properties and bubble characteristics are presented and discussed. The breakdown behaviour, which is unrelated to cavitation, is found to depend mainly on the tip vortex circulation and on the axial flow component in the vortex core. Only configurations with a velocity excess, with respect to the free stream, at high angle of attack, allow the formation of a breakdown bubble.
We investigate the onset of thermosolutal instabilities in a layer of moderately dense nanoparticle suspension cooled at the substrate in the presence of interfacial nanoparticle kinetics (adsorption and desorption) at the deformable interface. Gravity and the Soret effects are taken into account. A mathematical model with nanoparticle concentration-dependent thermophysical properties of the nanofluid is formulated. The surface tension is assumed to be a linear function of the temperature; however, the equation of state displays non-monotonicity with nanoparticle concentration due to nanoparticle interfacial energetics. We carry out the linear stability analysis of the quiescent base state using normal modes and the obtained eigenvalue problem is solved numerically. The monotonic short-wave solutocapillary instability is found and analysed for different parameter sets. The limiting case of insoluble interfacial nanoparticle concentration is also investigated. Notably, we identify the onset of the monotonic short-wave thermocapillary instability owing to a strong coupling between the perturbations of interfacial nanoparticle concentration and temperature via the particle concentration-dependent thermal conductivity in general, and in particular, near the interface. The combined thermo-solutocapillary instability is also investigated. Finally, the simplified toy problem is formulated and solved analytically to demonstrate the role of thermal conductivity stratification and interfacial kinetics.
Focusing on case studies of Shrewsbury, Chester, York, Coventry, and Bristol, this article analyzes how the concept of the “historic town” emerged in the first half of the nineteenth century. Traditionally a town’s historic identity had been understood in a legal and institutional sense. By the end of the eighteenth century, however, the use of the term “ancient” or “historic” to describe a town had become less a claim to long-standing privileges and traditional importance than an indication of a particular appearance and atmosphere, redolent of an era that was increasingly referred to as “the olden time.” A historic town offered the promise of a certain kind of historical experience and ambience that could be strategically exploited in order to attract visitors, and their custom, in greater numbers. The “invention” of the historic town was most obviously a response to the rapid changes consequent upon urbanization. But we need also to consider other factors, including changing attitudes toward the past and the broader consumption of history; developments in architectural history, particularly a new appreciation for the vernacular domestic architecture of the early modern period; and the rise of domestic tourism, facilitated by the advent of railway travel. Finally, the invention of the historic town is also a story about the early origins of heritage and the emergence of a preservationist ethos.
This paper revisits the relationship between population growth and economic performance by extending the Solow framework to include land as a fixed factor in a two-sector economy and migration as an endogenous adjustment. Because only agriculture uses land, effective land intensity becomes endogenous to structural transformation, declining as economies diversify. The impact of population growth therefore depends on land scarcity but is mitigated by sectoral reallocation and migration. Using a panel of 152 countries over 1960–2023 and both fixed-effects and system- Generalized Method of Moments (GMM) estimators, we show that the effect of natural population growth on per-capita income growth is highly conditional. Population growth becomes growth-reducing in agriculture-dependent and land-scarce economies, but this effect is attenuated by lower agricultural shares and land-saving technological progress. Migration further alleviates demographic pressure by reallocating labor away from land-intensive production.