BURUNGALE, ASHAY A.; HIDA, HARUZO; Univ Arizona, Dept Math (CAMBRIDGE UNIV PRESS, 2016-07-20)
      Let F/Q be a totally real field and K/F a complex multiplication (CM) quadratic extension. Let I he a cuspidal Hilbert modular new form over F. Let lambda he a Ilecke character over K such that the Rankin Selherg convolution f with the theta-series associated with lambda is self-dual with root number 1. We consider the nonvanishing of the family of central-critical Rankin Selberg L-values L(1/2, f circle times lambda(chi)), as chi varies over the class group characters of K. Our approach is geometric, relying on the Zariski density of CM points in self-products of a Hilbert modular Shimura variety. We show that the number of class group characters chi such that L(1/2, f circle times lambda(chi)) not equal 0 increases with the absolute value of the discriminant of K. We crucially rely on the Andre-Oort conjecture for arbitrary self-product of the Hilbert modular Shimura variety. In view of the recent results of Tsitnertnan, Yuan Zhang and Andreatta-Goren-Howard-Pera, the results are now unconditional. We also consider a quaternionic version. Our approach is geometric, relying on the general theory of Shimura varieties and the geometric definition of nearly holomorphic modular forms. In particular, the approach avoids any use of a suhconvex hound for the Rankin Selberg L-values. The Waklspurger formula plays an underlying role.
    • Anxiety reduction after pre-procedure meetings in patients with CHD

      Boyer, Preston J; Yell, Joshua A; Andrews, Jennifer G; Seckeler, Michael D; Univ Arizona, Dept Pediat; Univ Arizona, Coll Med; Univ Arizona, Dept Pediat, Div Cardiol (CAMBRIDGE UNIV PRESS, 2020-06-05)
      Background: Cardiac catheterisations for CHD produce anxiety for patients and families. Current strategies to mitigate anxiety and explain complex anatomy include pre-procedure meetings and educational tools (cardiac diagrams, echocardiograms, imaging, and angiography). More recently, three-dimensionally printed patient-specific models can be added to the armamentarium. The purpose of this study was to evaluate the efficacy of pre-procedure meetings and of different educational tools to reduce patient and parent anxiety before a catheterisation. Methods: Prospective study of patients >= 18 and parents of patients <18 scheduled for clinically indicated catheterisations. Patients completed online surveys before and after meeting with the interventional cardiologist, who was blinded to study participation. Both the pre- and post-meeting surveys measured anxiety using the State-Trait Anxiety Inventory. In addition, the post-meeting survey evaluated the subjective value (from 1 to 4) of individual educational tools: physician discussion, cardiac diagrams, echocardiograms, prior imaging, angiograms and three-dimensionally printed cardiac models. Data were compared using paired t-tests. Results: Twenty-three patients consented to participate, 16 had complete data for evaluation. Mean State-Trait Anxiety Inventory scores were abnormally elevated at baseline and decreased into the normal range after the pre-procedure meeting (39.8 versus 31, p = 0.008). Physician discussion, angiograms, and three-dimensional models were reported to be most effective at increasing understanding and reducing anxiety. Conclusion: In this pilot study, we have found that pre-catheterisation meetings produce a measurable decrease in patient and family anxiety before a procedure. Discussions of the procedure, angiograms, and three-dimensionally printed cardiac models were the most effective educational tools.
    • Astrophysical gyrokinetics: turbulence in pressure-anisotropic plasmas at ion scales and beyond

      Kunz, M. W.; Abel, I. G.; Klein, K. G.; Schekochihin, A. A.; Univ Arizona, Lunar & Planetary Lab (CAMBRIDGE UNIV PRESS, 2018-04)
      We present a theoretical framework for describing electromagnetic kinetic turbulence in a multi-species, magnetized, pressure-anisotropic plasma. The turbulent fluctuations are assumed to be small compared to the mean field, to be spatially anisotropic with respect to it and to have frequencies small compared to the ion cyclotron frequency. At scales above the ion-Larmor radius, the theory reduces to the pressure-anisotropic generalization of kinetic reduced magnetohydrodynamics (KRMHD) formulated by Kunz et al. (J. Plasma Phys., vol. 81, 2015, 325810501). At scales at and below the ion-Larmor radius, three main objectives are achieved. First, we analyse the linear response of the pressure-anisotropic gyrokinetic system, and show it to be a generalization of previously explored limits. The effects of pressure anisotropy on the stability and collisionless damping of Alfvenic and compressive fluctuations are highlighted, with attention paid to the spectral location and width of the frequency jump that occurs as Alfven waves transition into kinetic Alfven waves. Secondly, we derive and discuss a very general gyrokinetic free-energy conservation law, which captures both the KRMHD free-energy conservation at long wavelengths and dual cascades of kinetic Alfven waves and ion entropy at sub-ion-Larmor scales. We show that non-Maxwellian features in the distribution function change the amount of phase mixing and the efficiency of magnetic stresses, and thus influence the partitioning of free energy amongst the cascade channels. Thirdly, a simple model is used to show that pressure anisotropy, even within the bounds imposed on it by firehose and mirror instabilities, can cause order-of-magnitude variations in the ion-to-electron heating ratio due to the dissipation of Alfvenic turbulence. Our theory provides a foundation for determining how pressure anisotropy affects turbulent fluctuation spectra, the differential heating of particle species and the ratio of parallel and perpendicular phase mixing in space and astrophysical plasmas.
    • Canadian adaptation of the Newest Vital Sign©, a health literacy assessment tool

      Mansfield, Elizabeth D; Wahba, Rana; Gillis, Doris E; Weiss, Barry D; L'Abbé, Mary; Univ Arizona, Coll Med (CAMBRIDGE UNIV PRESS, 2018-08-01)
      Objective: The Newest Vital Sign (c) (NVS) was developed in the USA to measure patient health literacy in clinical settings. We adapted the NVS for use in Canada, in English and French, and created a computerized version. Our objective was to evaluate the reliability of the Canadian NVS as a self-administered computerized tool. Design: We used a randomized crossover design with a washout period of 3-4 weeks to compare health literacy scores obtained using the computerized version with scores obtained using the standard interviewer-administered NVS. ANOVA models and McNemar's tests assessed differences in outcomes assessed with each version of the NVS and order effects of the testing. Setting: Participants were recruited from multicultural catchment areas in Ontario and Nova Scotia. Subjects: English- and French-speaking adults aged 18 years or older. Results: A total of 180 (81%) of the 222 adults (112 English/110 French) initially recruited completed both the interviewer-NVS and computer-NVS. Scores for those who completed both assessments ranged from 0 to 6 with a mean of 3-63 (SD 2.41) for the computerized NVS and 3.41 (SD 2.21) for the interview-administered NVS. Few (n 18; seven English, eleven French) participants' health literacy assessments differed between the two versions. Conclusions: Overall, the computerized Canadian NVS performed as well as the interviewer-administered version for assessing health literacy levels of English- and French-speaking participants. This Canadian adaptation of the NVS provides Canadian researchers and public health practitioners with an easily administered health literacy assessment tool that can be used to address the needs of Canadians across health literacy levels and ultimately improve health outcomes.
    • Collisionless energy transfer in kinetic turbulence: field–particle correlations in Fourier space

      Li, Tak Chu; Howes, Gregory G.; Klein, Kristopher G.; Liu, Yi-Hsin; TenBarge, Jason M.; Univ Arizona, Lunar & Planetary Lab (CAMBRIDGE UNIV PRESS, 2019-08)
      Turbulence is commonly observed in nearly collisionless heliospheric plasmas, including the solar wind and corona and the Earth's magnetosphere. Understanding the collisionless mechanisms responsible for the energy transfer from the turbulent fluctuations to the particles is a frontier in kinetic turbulence research. Collisionless energy transfer from the turbulence to the particles can take place reversibly, resulting in non-thermal energy in the particle velocity distribution functions (VDFs) before eventual collisional thermalization is realized. Exploiting the information contained in the fluctuations in the VDFs is valuable. Here we apply a recently developed method based on VDFs, the field-particle correlation technique, to a beta = 1, solar-wind-like, low-frequency Alfvenic turbulence simulation with well-resolved phase space to identify the field-particle energy transfer in velocity space. The field-particle correlations reveal that the energy transfer, mediated by the parallel electric field, results in significant structuring of the VDF in the direction parallel to the magnetic field. Fourier modes representing the length scales between the ion and electron gyroradii show that energy transfer is resonant in nature, localized in velocity space to the Landau resonances for each Fourier mode. The energy transfer closely follows the Landau resonant velocities with varying perpendicular wavenumber k(perpendicular to) and plasma beta. This resonant signature, consistent with Landau damping, is observed in all diagnosed Fourier modes that cover the dissipation range of the simulation.

      We construct, over any CM field, compatible systems of l-adic Galois representations that appear in the cohomology of algebraic varieties and have (for all l) algebraic monodromy groups equal to the exceptional group of type E-6.
    • Creative Mitigation: Alternative Strategies for Resources, Stakeholders, and the Public

      Douglass, John G.; Manney, Shelby A.; Univ Arizona, Sch Anthropol (CAMBRIDGE UNIV PRESS, 2020-08)
      Standard mitigation treatment for adverse effects to significant cultural resources has historically been a combination of data recovery excavation along with artifact analysis, reporting, and curation, whose purpose is to move the undertaking forward. Over the past several decades, there has been increased interest and understanding of alternative, or creative, mitigation options in these situations, which may, in the end, be the best option for the resource and more meaningful to both project stakeholders and the public. This article, the first in this special issue on creative mitigation, introduces the regulatory and conceptual framework for creative mitigation and weaves themes introduced in subsequent articles in this issue.
    • Democratic Public Justification

      Motchoulski, Alexander; Univ Arizona, Dept Philosophy (CAMBRIDGE UNIV PRESS, 2020-11-13)
      Democratic institutions are appealing means of making publicly justified social choices. By allowing participation by all citizens, democracy can accommodate diversity among citizens, and by considering the perspectives of all, via ballots or debate, democratic results can approximate what the balance of reasons favors. I consider whether, and under what conditions, democratic institutions might reliably make publicly justified social decisions. I argue that conventional accounts of democracy, constituted by voting or deliberation, are unlikely to be effective public justification mechanisms. I conclude that the limitations of conventional mechanisms can be ameliorated through the use of lotteries instead of elections.
    • Director Connectedness: Monitoring Efficacy and Career Prospects

      Intintoli, Vincent J.; Kahle, Kathleen M.; Zhao, Wanli; Univ Arizona, Eller Coll Management (CAMBRIDGE UNIV PRESS, 2018-02-14)
      We examine a specific channel through which director connectedness may improve monitoring: financial reporting quality. We find that the connectedness of independent, nonco-opted audit committee members has a positive effect on financial reporting quality and accounting conservatism. The effect is not significant for non-audit committee or co-opted audit committee members. Our results are robust to tests designed to mitigate self-selection. Consistent with connected directors being valuable, the market reacts more negatively to the deaths of highly connected directors than to the deaths of less connected directors. Better connected directors also have better career prospects, suggesting they have greater incentives to monitor.
    • Earth-Like: An education & outreach tool for exploring the diversity of planets like our own

      Tasker, Elizabeth J.; Ishimaru, Kana; Guttenberg, Nicholas; Foriel, Julien; Univ Arizona, Lunar & Planetary Lab (CAMBRIDGE UNIV PRESS, 2020-01-13)
      Earth-Like is an interactive website and twitter bot that allows users to explore changes in the average global surface temperature of an Earth-like planet due to variations in the surface oceans and emerged land coverage, rate of volcanism (degassing) and the level of the received solar radiation. The temperature is calculated using a simple carbon-silicate cycle model to change the level of CO(2)in the atmosphere based on the chosen parameters. The model can achieve a temperature range exceeding -100 degrees C to 100 degrees C by varying all three parameters, including freeze-thaw cycles for a planet with our present-day volcanism rate and emerged land fraction situated at the outer edge of the habitable zone. To increase engagement, the planet is visualized by using a neural network to render an animated globe, based on the calculated average surface temperature and chosen values for land fraction and volcanism. The website and bot can be found at earthlike.world and on twitter as @earthlikeworld. Initial feedback via a user survey suggested that Earth-Like is effective at demonstrating that minor changes in planetary properties can strongly impact the surface environment. The goal of the project is to increase understanding of the challenges we face in finding another habitable planet due to the likely diversity of conditions on rocky worlds within our Galaxy.
    • Effect of dietary fiber on the methanogen community in the hindgut of Lantang gilts

      Cao, Z.; Liang, J. B.; Liao, X. D.; Wright, A. D. G.; Wu, Y. B.; Yu, B.; Univ Arizona, Sch Anim & Comparat Biomed Sci, Coll Agr & Life Sci (CAMBRIDGE UNIV PRESS, 2016-04-07)
      The primary objective of this study was to investigate the effect of dietary fiber on methanogenic diversity and community composition in the hindgut of indigenous Chinese Lantang gilts to explain the unexpected findings reported earlier that Lantang gilts fed low-fiber diet (LFD) produced more methane than those fed high-fiber diet (HFD). In total, 12 Lantang gilts (58.7±0.37 kg) were randomly divided into two dietary groups (six replicates (pigs) per group) and fed either LFD (NDF=201.46 g/kg) or HFD (NDF=329.70 g/kg). Wheat bran was the main source of fiber for the LFD, whereas ground rice hull (mixture of rice hull and rice bran) was used for the HFD. Results showed that the methanogens in the hindgut of Lantang gilts belonged to four known species ( Methanobrevibacter ruminantium, Methanobrevibacter wolinii , Methanosphaera stadtmanae and Methanobrevibacter smithii ), with about 89% of the methanogens belonging to the genus Methanobrevibacter . The 16S ribosomal RNA (rRNA) gene copies of Methanobrevibacter were more than three times higher ( P <0.05) for gilts fed LFD (3.31×10 9 copies/g dry matter (DM)) than gilts fed HFD (1.02×10 9 copies/g DM). No difference ( P >0.05) was observed in 16S rRNA gene copies of Fibrobacter succinogenes between the two dietary groups, and 18S rRNA gene copies of anaerobic fungi in gilts fed LFD were lower than ( P <0.05) those fed HFD. To better explain the effect of different fiber source on the methanogen community, a follow-up in vitro fermentation using a factorial design comprised of two inocula (prepared from hindgut content of gilts fed two diets differing in their dietary fiber)×four substrates (LFD, HFD, wheat bran, ground rice hull) was conducted. Results of the in vitro fermentation confirmed that the predominant methanogens belonged to the genus of Methanobrevibacter , and about 23% methanogens was found to be distantly related (90%) to Thermogymnomonas acidicola. In vitro fermentation also seems to suggest that fiber source did change the methanogens community. Although the density of Methanobrevibacter species was positively correlated with CH 4 production in both in vivo ( P <0.01, r =0.737) and in vitro trials ( P <0.05, r =0.854), which could partly explain the higher methane production from gilts fed LFD compared with those in the HFD group. Further investigation is needed to explain how the rice hull affected the methanogens and inhibited CH 4 emission from gilts fed HFD.
    • An effect of flaps on the fourth formant in English

      Warner, Natasha; Tucker, Benjamin V.; Univ Arizona (CAMBRIDGE UNIV PRESS, 2016-07-07)
      Very few segments of the world's languages have been shown to have a systematic effect on the fourth formant (F4). We investigate a large drop in F4 which sometimes occurs in conjunction with the flap in American English. The goal of the present work is to document this phenomenon, and to determine what phonological environments coincide with this large drop in F4. We measure data from six speakers producing words with medial flaps in various environments, such as party, turtle, bottle, credit, harder . We find that the combination of flap with a rhotic and to a lesser extend a syllabic / / leads to a larger drop in F4 than other flap combinations like a following / i /. Together with previous perceptual data, the findings support the conclusion that this feature of F4 results from transitions among articulations.
    • Electronic cigarette use and tobacco cessation in a state-based quitline

      Brady, Benjamin R.; Crane, Tracy E.; O'Connor, Patrick A.; Nair, Uma S.; Yuan, Nicole P.; Univ Arizona, Mel & Enid Zuckerman Coll Publ Hlth; Univ Arizona, Coll Nursing; Univ Arizona, Ctr Canc (CAMBRIDGE UNIV PRESS, 2019-09)
      Introduction. Evidence is mixed on e-cigarette's effectiveness as a tobacco cessation aid. Research suggests that e-cigarette users face greater barriers to quitting tobacco. Aim. To examine the association between e-cigarette use and tobacco cessation outcomes among quitline callers. Methods. We examined 2,204 callers who enrolled and completed 7-month follow-up surveys between April 2014 and January 2017. We examined the association between any e-cigarette use and tobacco cessation. We also evaluated these relationships by e-cigarette use patterns between enrollment and 7-month follow-up: sustained, adopted, discontinued, and non-use. We used multivariable logistic regression to control for caller characteristics, tobacco history, and program utilization. Results. Overall, 18% of callers reported using e-cigarettes at enrollment, follow-up, or both. Compared to non-users, e-cigarette users were more likely to be younger, non-Hispanic, and report a mental health condition. The adjusted odds of tobacco cessation were not statistically different for callers who used e-cigarettes compared to those who did not (adjusted odds ratios = 1.02, 95% confidence interval 0.79-1.32). Results were similar when examining cessation by patterns of e-cigarette use. Conclusions. E-cigarette use was not associated with tobacco cessation. This suggests that e-cigarette use may neither facilitate nor deter tobacco cessation among quitline callers. Future research should continue exploring how e-cigarette use affects quitting.

      Rose, Carol M.; Univ Arizona, Law Coll (CAMBRIDGE UNIV PRESS, 2018-12-04)
      A norm of equal treatment is cited regularly in the American jurisprudence of property takings under the Fifth and Fourteenth Amendments to the Constitution, as a benchmark of fair treatment of owners. According to an increasingly prevalent version of this equality norm, courts should look to parity of treatment among property owners in investigating whether particular regulations take property. This essay argues, however, that such an equality norm is misplaced, and that courts should judge fairness by the criterion of expectationincluding reasonable expectations of regulation.A norm of equality becomes problematic in the face of the economic theory of the evolution of property. This theory posits that as resources become more congested, their uses carry increasing common pool costs or externalitiesa scenario that should predictably result in more stringent resource managementup to and including the establishment of regulatory regimes as well as property rights themselves. This evolutionary pattern, however, places earlier and later resource users in different positions vis-a-vis both common pool externalities and regulatory responses, and their different temporal positions fragment the meaning of equal treatment and destabilize it as a jurisprudential norm. This essay argues that while equal treatment may be a benchmark for special or invidious cases, like those relating to civil rights, the great bulk of takings cases involve regulatory responses to congesting resources, where a norm of equal treatment breaks down. Thus, in seeking fair treatment, takings jurisprudence should downplay equality and instead look to the understanding of property as a basis of expectationsbut those expectations should include the anticipation of reasonable regulatory responses to resource congestion.
    • Evidence for Reduced Autobiographical Memory Episodic Specificity in Cognitively Normal Middle-Aged and Older Individuals at Increased Risk for Alzheimer's Disease Dementia

      Grilli, Matthew D; Wank, Aubrey A; Bercel, John J; Ryan, Lee; Univ Arizona, Dept Psychol; Univ Arizona, Dept Neurol; Univ Arizona, McKnight Brain Inst (CAMBRIDGE UNIV PRESS, 2018-11-01)
      Objectives: Alzheimer's disease (AD) typically eludes clinical detection for years, if not decades. The identification of subtle cognitive decline associated with preclinical AD would not only advance understanding of the disease, but also provide clinical targets to assess preventative and early intervention treatments. Disrupted retrieval of detailed episodic autobiographical memories may be a sensitive indicator of subtle cognitive decline, because this type of memory taxes a core neural network affected by preclinical AD neuropathology. Methods: To begin to address this idea, we assessed the episodic specificity of autobiographical memories retrieved by cognitively normal middle-aged and older individuals who are carriers of the apolipoprotein E epsilon 4 allele - a population at increased risk for subtle cognitive decline related to neuropathological risk factors for AD. We compared the 4 carriers to non-carriers of epsilon 4 similar in age, education, and gender. Results: The epsilon 4 carriers did not perform worse than the non-carriers on a comprehensive battery of neuropsychological tests. In contrast, as a group, the epsilon 4 carriers generated autobiographical memories that were reduced in "internal" or episodic details relative to non-carriers. Conclusions: These findings support the notion that reduced autobiographical episodic detail generation may be a marker of subtle cognitive decline associated with AD.
    • Family matters in racial logics: Tracing intimacies, inequalities, and ideologies

      Peterson, V. Spike; Univ Arizona, Int Relat, Sch Govt & Publ Policy; Univ Arizona, Dept Gender & Womens Studies; Univ Arizona, Inst LGBT Studies (CAMBRIDGE UNIV PRESS, 2020-04)
      This article seeks to advance our understanding of how intimate relations and racial logics are co-constituted and matter - subjectively, culturally, materially, and politically - in our colonial present of economic inequalities, nationalist populisms, anti-migrant discourses and xenophobic hostilities. Addressing these crisis conditions is urgent, yet critical interventions indicate that prevailing accounts inadequately address the scale, complexity, and fluidity of racisms operating today. This article proposes to think racial logics 'otherwise' by drawing on interdisciplinary scholarship and intersectional analytics to produce a genealogy of state/nation formation processes, imperial encounters, and legitimating ideologies that illuminates how 'intimacy builds worlds'.(1) A deep history of political centralisation reveals that regulation of intimate, familial relations is a constitutive feature of successful state-making and crucial for understanding how modernity's 'race difference' is produced and how the racialisation of 'Other' ('non-European', undesirable) sexual/familial practices figures in contemporary crises. Locating intimate relations - 'family' - in (birthright) citizenship, immigration regimes, and political-economic frames helps clarify the amplification of global inequalities and the power of stigmatisations to fuel nationalist attachments and anti-migrant hostilities. Foregrounding intimacy and integrating typically disparate lines of inquiry advances our analyses of today's often opaque yet intense racisms and their globally problematic effects.
    • Feasibility and acceptability of a beverage intervention for Hispanic adults: results from a pilot randomized controlled trial

      Garcia, David O; Morrill, Kristin E; Aceves, Benjamin; Valdez, Luis A; Rabe, Brooke A; Bell, Melanie L; Hakim, Iman A; Martinez, Jessica A; Thomson, Cynthia A; Univ Arizona, Mel & Enid Zuckerman Coll Publ Hlth, Dept Hlth Promot Sci; et al. (CAMBRIDGE UNIV PRESS, 2019-03-01)
      Objective To assess the feasibility and acceptability of a beverage intervention in Hispanic adults. Design Eligible individuals identified as Hispanic, were 18-64 years old and had BMI 30.0-50.0 kg/m(2). Participants were randomized 2:2:1 to one of three beverages: Mediterranean lemonade (ML), green tea (GT) or flavoured water control (FW). After a 2-week washout period, participants were asked to consume 32 oz (946 ml) of study beverage daily for 6 weeks and avoid other sources of tea, citrus, juice and sweetened beverages; water was permissible. Fasting blood samples were collected at baseline and 8 weeks to assess primary and secondary efficacy outcomes. Setting Tucson, AZ, USA. Participants Fifty-two participants were recruited over 6 months; fifty were randomized (twenty-one ML, nineteen GT, ten FW). Study population mean (sd) age 44.6 (sd 10.2) years, BMI 35.9 (4.6) kg/m(2); 78 % female. Results Forty-four (88 %) completed the 8-week assessment. Self-reported adherence was high. No significant change (95 % CI) in total cholesterol (mg/dl) from baseline was shown -1.7 (-14.2, 10.9), -3.9 (-17.2, 9.4) and -13.2 (-30.2, 3.8) for ML, GT and FW, respectively. Mean change in HDL-cholesterol (mg/dl) -2.3 (-5.3, 0.7; ML), -1.0 (-4.2, 2.2; GT), -3.9 (-8.0, 0.2; FW) and LDL-cholesterol (mg/dl) 0.2 (-11.3, 11.8; ML), 0.5 (-11.4, 12.4; GT), -9.8 (-25.0, 5.4; FW) were also non-significant. Fasting glucose (mg/dl) increased significantly by 5.2 (2.6, 7.9; ML) and 3.3 (0.58, 6.4; GT). No significant change in HbA1c was demonstrated. Due to the small sample size, potential confounders and effect modifiers were not investigated. Conclusions Recruitment and retention figures indicate that a larger-scale trial is feasible; however, favourable changes in cardiometabolic biomarkers were not demonstrated.
    • Fortune Favors the Bold

      Meneghetti, Costanza; Williams, Ryan; Univ Arizona, Eller Coll Management (CAMBRIDGE UNIV PRESS, 2017-06-15)
      We investigate whether incentives to join the Fortune 500 affect corporate decisions. Firms closer to the cutoff appear to take actions to join the list by engaging in more mergers and acquisitions activity, bidding for larger targets, and paying higher takeover premia. Further, the relation is stronger for firms with more-entrenched chief executive officers, and the stock market reaction to bids is worse when bidders are close to the Fortune 500's cutoff. A 1994 methodological change by Fortune acts as an exogenous shock for identification. Our results suggest that firms try to increase revenues to join the Fortune 500 but that such actions adversely affect shareholders.
    • Good Intentions

      Srinivasan, Ragini Tharoor; Univ Arizona, English & Social Cultural & Crit Theory (CAMBRIDGE UNIV PRESS, 2020-04)
      This article is part of a special forum on Pooja Rangan's award-winning monograph Immediations: The Humanitarian Impulse in Documentary (Duke University Press, 2017).
    • Hedge Fund Return Dependence: Model Misspecification or Liquidity Spirals?

      Sias, Richard; Turtle, Harry J.; Zykaj, Blerina; Univ Arizona, Eller Coll Management (CAMBRIDGE UNIV PRESS, 2017-10-02)
      We test whether model misspecification or liquidity spirals primarily explain the observed excess dependence in filtered (for economic fundamentals) hedge fund index returns and the links between volatility, liquidity shocks, and hedge fund return clustering. Evidence supports the model misspecification hypothesis: i) hedge fund filtered return clustering is symmetric, ii) filtered Short Bias fund returns exhibit negative dependence with filtered returns for other hedge fund types, iii) negative liquidity shocks are associated with clustering in both tails and market volatility subsumes the role of negative liquidity shocks, and iv) these same patterns appear in size-sorted equity portfolios.