Political scientists regularly rely on a selection-on-observables assumption to identify causal effects of interest. Once a causal effect has been identified in this way, a wide variety of estimators can, in principle, be used to consistently estimate the effect of interest. While these estimators are all justified by appeals to the same causal identification assumptions, they often differ greatly in how they make use of the data at hand. For instance, methods based on regression rely on an explicit model of the outcome variable but do not explicitly model the treatment assignment process, whereas methods based on propensity scores explicitly model the treatment assignment process but do not explicitly model the outcome variable. Understanding the tradeoffs between estimation methods is complicated by these seemingly fundamental differences. In this paper we seek to rectify this problem. We do so by clarifying how most estimators of causal effects that are justified by an appeal to a selection-on-observables assumption are all special cases of a general weighting estimator. We then explain how this commonality provides for diagnostics that allow for meaningful comparisons across estimation methods—even when the methods are seemingly very different. We illustrate these ideas with two applied examples.

This essay takes as its point of departure the so-called ‘Verdi A’, 432Hz. From the late 1860s through to the 1880s, the opera composer was intensely preoccupied with the question of tuning, weighing in several times on the matter of where A should sit. Verdi was concerned for the strain that high tunings should place on singers’ voices. He advocated on multiple occasions for global acceptance of an A well below 440, and sent Arrigo Boito to argue in favour of A=432 at the Congresso dei Musicisti Italiani, held in Milan on 16–21 June 1881. In the 1880s, Italy remained one of the only nations in Europe that had not adopted equal temperament wholesale for fixed-tone instruments; as in the case of its spoken languages during this same period, and the locations of its A, temperament varied by region, with the southern part of the peninsula clinging to meantones. This article argues that ‘Verdi tuning’ represents the end point of a number of longer shifts in the conceptualization of musical sound, particularly in the Italian context: from temperament to tuning (accordatura); from relative conceptions of musical pitch to an absolute one; from local and regional variations towards a standardized system; from an older notion of all-encompassing nature to a presumed separation between nature and culture. Tracing this history through the Italian long nineteenth century will involve concentrating on what this article calls music-adjacent sound: that is, interrogative play with musical pitch; sound experiments from musical materials and operatic voices; instrument tuning by ear; listening for overtones; legislating preferred ratios and (eventually) frequencies for musical use; and constructing a theory of music that draws together these means of sounding. Music-adjacent sound is where the conditions for music-making were and still are established. This article argues that an attention to these sonic and nearly musical moments can demonstrate how listening and the musical imagination were cultivated outside the boundaries of any work or performance.

Premature atrial complexes are frequent among patients after heart transplantation. We herein report on the successful use of ivabradine in a 15-year old patient who exhibited marked palpitations caused by atrial premature complexes after orthotopic bicaval heart transplantation.

The whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is economically one of the most threatening pests in tomato cultivation, which not only causes direct damage but also transmits many viruses. Breeding whitefly-resistant tomato varieties is a promising and environmentally friendly method to control whitefly populations in the field. Accumulating evidence from tomato and other model systems demonstrates that flavonoids contribute to plant resistance to herbivorous insects. Previously, we found that high flavonoid-producing tomato line deterred whitefly oviposition and settling behaviours, and was more resistant to whiteflies compared to the near-isogenic low flavonoid-producing tomato line. The objective of the current work is to describe in detail different aspects of the interaction between the whitefly and two tomato lines, including biochemical processes involved. Electrical penetration graph recordings showed that high flavonoid-producing tomato reduced whitefly probing and phloem-feeding efficiency. We also studied constitutive and induced plant defence responses and found that whitefly induced stronger reactive oxygen species accumulation through NADPH oxidase in high flavonoid-producing tomato than in low flavonoid-producing tomato. Moreover, whitefly feeding induced the expression of callose synthase genes and resulted in callose deposition in the sieve elements in high flavonoid-producing tomato but not in low flavonoid-producing tomato. As a consequence, whitefly feeding on high flavonoid-producing tomato significantly decreased uptake of phloem and reduced its performance when compared to low flavonoid-producing tomato. These results indicate that high flavonoid-producing tomato provides phloem-based resistance against whitefly infestation and that the breeding of such resistance in new varieties could enhance whitefly management.

Numerous studies show that women are less likely than men to express attitudes and opinions about politics. To explore the origins of this gender gap, we use data from a series of surveys of the general public and international relations scholars in the United States between 2014 and 2023. These data show that the gender gap in political expression exists, even among knowledge elites; female IR scholars say they don’t know the answer to survey questions at higher rates than their male colleagues. We also find that differences in political knowledge explain a significant part of the gap in political expression; the highly educated female scholars we surveyed were less likely than women in the general public to say they didn’t know the answer to survey questions. At the same time, factors other than knowledge, including confidence, also matter. Our public opinion survey shows that women select extreme answers, such as “strongly agree/disagree” rather than simply “agree/disagree,” at lower rates than men. Despite high levels of education among the female scholars we surveyed, they too are more hesitant than their male counterparts to select extreme answers. These findings have important implications for civic participation as well as for the recognition of women’s expertise within the academy and society more broadly.

This paper examines how, in politically polarized contexts, people reconstruct the biographies of contested memorialized figures to challenge or reproduce dualistic metanarratives of national history. We analyze two sites of recent controversy in Scotland and Lithuania which have been engaged in struggles over how to memorialize individuals who, at various points in their lives, engaged in acts of both anti-imperial resistance and collaboration in those same empires’ systems of oppression. Their moral liminality—a term we employ to refer to the transgression of moral categories—blurs the boundaries between perpetrators and victims of imperial violence, calling into question binary frameworks underpinning broader national narratives. Based on a comparative media analysis of debates over the legacies of David Livingstone and Jonas Noreika, we find that though some people in both Scotland and Lithuania have embraced these figures’ moral liminality, others have, instead, suppressed aspects of their biographies to uphold traditional distinctions between national “heroes” and foreign “villains.” We argue that such moral binaries are either blurred or reproduced through the manipulation of three aspects of liminal figures’ biographical records: their agency, motives, and social impact.

The 13 species of hornbills occurring in Indonesia have been studied to varying degrees, but a comprehensive identification of knowledge gaps is still lacking. We conducted a systematic review of the literature to identify the species and topics that require further investigation. We searched the literature using ScienceDirect, Google Scholar, Neliti, ResearchGate, and the Google search engine for all publications from 1970 to 2023. Publications were grouped under 15 conservation and ecological topics related to hornbills. Our review included 183 publications, comprising journal articles (56.3%), theses/dissertations (23.5%), conference papers (18.6%), and small portions of books and book sections (1.6%). Almost all the literature (72%) had been published after 2013, while the remaining (28%) was published before this period. The need for further studies across all research topics was identified for several species, including the Sumba Hornbill Rhyticeros everetti, Sulawesi Hornbill Rhabdotorrhinus exharratus, and Papuan Hornbill Rhyticeros plicatus. We also underscore the need for investigation into seed dispersal, ecotourism, and research methods across all hornbill species. Enhancing research and drawing public attention to Indonesia’s hornbills should increase their popularity and may serve to increase financial resources. This is the first systematic review of hornbill research for Indonesia and provides important information to determine future hornbill studies in the country.

Though the use of court documents as data is widespread within US sociolegal scholarship, their use remains surprisingly undertheorized as a methodological practice. This article, therefore, asks, what differentiates court materials from other forms of documentary data, and how do these attributes impact claimsmaking in law and society scholarship? Drawing on varied empirical examples from existing scholarship, we uncover five distinctive attributes: their multitemporality, their dialogic nature, the multiple truths they house, their multivocality, and their social productivity. Considering these attributes, we argue that court documents unite our diverse field of scholarship in two important ways. First, as an essential output of the legal system, they are arguably “our” data, shaping law and society as we know it today. Second, they both reify and obscure the power dynamics that make social inequality so durable, helping inequality appear “just.” Despite their underexploited promise for theory-building in sociolegal research, we also discuss the practical, epistemic, and ethical pitfalls to their use. Ultimately, ignoring these rich yet complex documents is to our field’s analytic peril.

In this article, I argue that the musical landscape in Panama during the nineteenth century was much more active, diverse and globally connected than previously observed by authors of traditionally accepted music historiography of the country. Particularly, I discuss the heightened activity in the second half of the century through primary sources concerning violinist Miguel Iturrado (d. 1879). I further argue that the violin culture fostered by Iturrado and his contemporaries became a solid platform for cultural exchange which allowed for the development of early-twentieth-century music production in Panama. I conclude that the flourishing of numerous fin-de-siècle concert violinists, as well as the advent of the violinist-composers of dance music now known as the Azuero School in the first third of twentieth-century Panama, are directly related to Iturrado’s –and his colleagues’– musical and cultural achievements.

Discourse on the existence of Ghanaian English (GhE) has provided several works leading to the descriptions of GhE pronunciations, especially vowels. However, the major challenge is that most of these studies, impressionistically, have provided different numbers of the English monophthongal vowels used in the Ghanaian context and often discount the existence of certain vowels used in GhE. Consequently, the present study employed the acoustic approach to investigate the English monophthongs produced by 40 educated Ghanaian speakers of English. The purposive sampling was used to select those with first degree to study. The descriptive research design was used to study the formant one and two of the vowels. The vowels were studied within three different contextual realisations: in citation, in sentences and in spontaneous speech. The results revealed that the Ghanaian speakers of English employed in this study realised the English vowels /iː, ɪ, e, a, ɑː, ɒ, ɔː, ʊ, uː ʌ, ə/. The /ɜː/ vowel was shortened while the /æ/ was replaced with the /a/ vowel. This suggests that most of the Ghanaian speakers of English in this study could produce more RP vowels, contrary to earlier studies.

Barricaded incidents, hostage-taking and sieges occur in the community, where police negotiators are usually called on to bring about a peaceful resolution. They occur also in prisons and psychiatric hospitals, where they will be managed by the institution’s staff, with police support if needed. Psychiatrists and other mental health professionals have been involved in providing training and on-call support for negotiators and decision makers in these crisis situations. This article describes definitions and goals in relation to such incidents, and outlines a five-phase framework for their management (training; first responders, preliminary interventions and inquiries; negotiations; resolution; aftercare), indicating the psychiatrist’s role during each phase. Ethical issues are also discussed.

Ensemble pour le plaisir ! (EPLP) est un programme ayant pour objectif d’amener les personnes vivant avec un trouble neurocognitif et leur proche aidant à retrouver des moments de plaisir au sein de leur relation. Appuyé par la théorie du comportement planifié d’Ajzen, le présent article vise à analyser la démarche d’implantation du programme EPLP au sein de milieux communautaires et de soulever les facteurs d’influence menant au changement de comportement des parties prenantes. Les résultats montrent que bien que les attitudes, les normes et la notion de contrôle soient favorables à l’intention de changer le comportement, des ressources médiatrices telles que le financement et le mentorat par l’équipe de recherche sont essentielles à l’implantation pérenne du programme.