Miracle-dz/UniFAR-FTUs huggingface dataset:
Race and School Quality Since Brown vs. Board of Education

This paper presents evidence on the quality of schooling by race and ethnic origin in the United States. Although substantial racial segregation across schools exists, the average pupil-teacher ratio is approximately the same for black and white students. Hispanic students, however, on average have 10 percent more students per teacher. Relative to whites, blacks and Hispanics are less likely to use computers at school and at work. The implications of these differences in school quality for labor market outcomes are examined. We conclude by examining reasons for the increase in the black-white earnings gap since the mid-1970s.
Auditor independence and the expectations gap: Some evidence of changing user perceptions

The audit function is an essential part of the regulatory structure which supports the integrity of our capital markets. There is a recognised expectations gap which surrounds the audit function, as many users of audited financial statements have different expectations of the audit function from what it delivers. Perceptions of auditor independence are a fundamental part of this expectations gap. In the light of recent significant changes to the regulatory framework, this paper reports a survey of leading financial journalists, to ascertain their current views on auditor independence. Findings show a belief that some of the changes have reduced the expectations gap although problems still exist in the area of non‐audit services. However, the most significant threat to independence is seen to be the economic and personal pressure on the partner as an individual, an area difficult to regulate. The challenge for audit firms is to demonstrate how well they control for this within their management structures.
Hope VI Housing Program: Was it Effective?

This article is a case study of the Park DuValle Revitalization Project in Louisville, Kentucky, to evaluate whether the Department of Housing and Urban Development's HOPE VI program enhances quality of life. Park DuValle has gotten national attention and has received awards from HUD, the American Institute of Architects, and the Congress on New Urbanism. The research finds that HOPE VI, which tends to serve the needs of non-public housing tenants (80 percent of whom are now residents of the Park DuValle development), does not help the vast majority of residents who are displaced. Furthermore, HOPE VI builds housing that is two to three times more costly per unit than housing provided by competing nonprofit community development groups.
Melatonin for Chronic Insomnia in Angelman Syndrome: A Randomized Placebo-Controlled Trial

Previous studies suggested that melatonin improves sleep in insomniac patients with Angelman syndrome. To assess the efficacy of melatonin, a randomized placebo-controlled study was conducted in 8 children with Angelman syndrome with idiopathic chronic insomnia. After a 1-week baseline period, patients received, depending on age, either melatonin 5 or 2.5 mg, or placebo, followed by 4 weeks of open treatment. Parents recorded lights off time, sleep onset time, wake-up time, and epileptic seizures in a diary. Salivary melatonin levels were measured at baseline and the last evening of the fourth treatment week. Melatonin significantly advanced sleep onset by 28 minutes, decreased sleep latency by 32 minutes, increased total sleep time by 56 minutes, reduced the number of nights with wakes from 3.1 to 1.6 nights a week, and increased endogenous salivary melatonin levels. Parents were satisfied with these results. Indications that melatonin dose in Angelman syndrome patients should be low, are discussed.
Excess histone levels mediate cytotoxicity via multiple mechanisms

The accumulation of excess histone proteins in cells has deleterious consequences such as genomic instability in the form of excessive chromosome loss, enhanced sensitivity to DNA damaging agents and cytotoxicity. Hence, the synthesis of histone proteins is tightly regulated at multiple steps and transcriptional as well as posttranscriptional regulation of histone proteins is well established. Additionally, we have recently demonstrated that histone protein levels are regulated posttranslationally by the DNA damage checkpoint kinase Rad53 and ubiquitin-proteasome dependent proteolysis in the budding yeast. However, the underlying mechanism/s via which excess histones exert their deleterious effects in vivo are not clear. Here we have investigated the mechanistic basis for the deleterious effects of excess histones in budding yeast. We find that the presence of excess histones saturates certain histone modifying enzymes, potentially interfering with their activities. Additionally, excess histones appear to bind non-specifically to DNA as well as RNA, which can adversely affect their metabolism. Microarray analysis revealed that upon overexpression of histone gene pairs, about 240 genes were either up- or downregulated by 2-fold or more. Overall, we present evidence that excess histones are likely to mediate their cytotoxic effects via multiple mechanisms that are primarily dependent on inappropriate electrostatic interactions between the positively charged histones and diverse negatively charged molecules in the cell. Our findings help explain the basis for the existence of multiple distinct mechanisms that contribute to the tight control of histone protein levels in cells and highlight their importance in maintaining genomic stability and cell viability.
Pension Reform in China: Challenges and Opportunities

China's current segmented pension system features regional imbalance, fiscal inefficiency, social inequality and economic unsustainability. It is a result of three-decade evolution guided by vague long-term objectives, constrained by economic and political circumstances and swayed by interest-group infighting. Expecting rapid population ageing and economic transformation, China aims to establish a national pension system that provides ‘wide coverage, basic security, multi-level options and sustainability’ by 2020. The paper reviews the history of China's pension system, examines proposed reform options and discusses the challenges and opportunities faced by the reform.
Further Results on Asymmetric Stable Distributions of Stock Price Chances

In a previous paper in the Journal of the American Statistical Association, Fielitz and Smith [16] present evidence in favor of asymmetric members of the stable family of distributions for describing stock price changes. Support for this contention is derived from an empirical examination of the daily closing prices of 200 stocks from the New York Stock Exchange from December 23, 1963, to November 29, 1968. In particular, the empirical examination of these securities indicates that outliers (especially in the short-tail (left-hand tail) of the distributions), kurtosis, and skewness are present in the distributions. These characteristics are consistent with the hypothesis that stock price changes belong to the asymmetric class of members of the stable family of distributions.
Imaging features contributing to the diagnosis of ameloblastomas and keratocystic odontogenic tumours: logistic regression analysis.

OBJECTIVE The aim of this study was to clarify the characteristic imaging features that can be used to differentiate ameloblastomas from keratocystic odontogenic tumours and to examine the significant imaging features contributing to a correct diagnosis. METHODS 60 observers (39 specialists in oral and maxillofacial radiology and 21 non-specialists) examined CT and/or panoramic images of 10 ameloblastomas and 10 keratocystic odontogenic tumours shown on a webpage and made diagnoses. Their correct answer ratios were then calculated. The imaging features of the tumours were evaluated and expressed as binary numbers or quantitative values. The imaging features that contributed to a correct diagnosis were elucidated using logistic regression analysis. RESULTS The mean correct answer ratio was 61.3% ± 17.2% for the diagnosis of ameloblastomas and keratocystic odontogenic tumours. CT images produced higher correct answer ratios for diagnosis of keratocystic odontogenic tumours by specialists. The significantly different imaging features between ameloblastomas and keratocystic odontogenic tumours were the degree of bone expansion and the presence of high-density areas. The significant imaging features contributing to a correct imaging diagnosis were the number of locules, the presence of high-density areas and the inclusion of impacted teeth. CONCLUSION The presence of high-density areas is the most useful feature in the differential diagnosis of ameloblastomas and keratocystic odontogenic tumours based on comparison of the imaging features of both tumours and examination of the diagnostic contributions of these features.
Should Shariah-compliant investors include commodities in their portfolios? New evidence

This paper investigates the links between price returns for seven commodities and Shariah-compliant equities (developed and emerging markets) over the period from January 1996 to April 2013. Employing the dynamic conditional correlation (DCC) M-GARCH methodology, we show that the correlations between commodity and stock markets evolve over time and are highly volatile, particularly during the financial crisis, which has played a key role, emphasizing the increased integration between commodity and stock markets, and underlining the financialization of commodity markets. However, in the last couple of years the correlation between commodities and equities seems to be decaying. Hence, Islamic investors hopefully could gain from the diversification benefits by the inclusion of commodities into their portfolios.
Dynamics of Cortical Neuronal Ensembles Transit from Decision Making to Storage for Later Report

Decisions based on sensory evaluation during single trials may depend on the collective activity of neurons distributed across brain circuits. Previous studies have deepened our understanding of how the activity of individual neurons relates to the formation of a decision and its storage for later report. However, little is known about how decision-making and decision maintenance processes evolve in single trials. We addressed this problem by studying the activity of simultaneously recorded neurons from different somatosensory and frontal lobe cortices of monkeys performing a vibrotactile discrimination task. We used the hidden Markov model to describe the spatiotemporal pattern of activity in single trials as a sequence of firing rate states. We show that the animal's decision was reliably maintained in frontal lobe activity through a selective state sequence, initiated by an abrupt state transition, during which many neurons changed their activity in a concomitant way, and for which both latency and variability depended on task difficulty. Indeed, transitions were more delayed and more variable for difficult trials compared with easy trials. In contrast, state sequences in somatosensory cortices were weakly decision related, had less variable transitions, and were not affected by the difficulty of the task. In summary, our results suggest that the decision process and its subsequent maintenance are dynamically linked by a cascade of transient events in frontal lobe cortices.
Corporate Governance and Accounting Conservatism: Evidence from the Banking Industry

Research Question/Issue: In this paper, we empirically investigate whether US listed commercial banks with effective corporate governance structures engage in higher levels of conservative financial accounting and reporting. Research Findings/Insights: Using both market- and accrual-based measures of conservatism and both composite and disaggregated governance indices, we document convincing evidence that well-governed banks engage in significantly higher levels of conditional conservatism in their financial reporting practices. For example, we find that banks with effective governance structures, particularly those with effective board and audit governance structures, recognize loan loss provisions that are larger relative to changes in nonperforming loans compared to their counterparts with ineffective governance structures. Theoretical/Academic Implications: We contribute to the extant literature on the relationship between corporate governance and quality of accounting information by providing evidence that banks with effective governance structures practice higher levels of accounting conservatism. Practitioner/Policy Implications: The findings of this study would be useful to US bank regulators/supervisors in improving the existing regulatory framework by focusing on accounting conservatism as a complement to corporate governance in mitigating the opaqueness and intense information asymmetry that plague banks.
Lamprey neurofilaments contain a previously unreported 50‐kDa protein

We have previously hypothesized that regeneration of axons after spinal cord injury in the lamprey may involve assembly and transport of neurofilaments (NFs) into the growing tip. A single NF, NF‐180, has been cloned in this laboratory and until now was thought to be the only NF subunit in lamprey nervous system. However, homopolymerization of NF‐180 has not been observed either in experiments on transfected cells or in self‐assembly tests in vitro. Forty‐three monoclonal antibodies designated as LCM series were generated previously against cytoskeletal proteins of the lamprey nervous system. Seven LCMs were NF specific, and five were keratin specific, as demonstrated by immunohistochemistry. In the present study, one antibody, LCM40, selectively labeled axons in immunohistochemical sections and recognized a single 50‐kDa protein in Western blots. Other neuron‐specific LCMs and anti‐NF antibodies, e.g., LCM39, recognized a known NF subunit, NF‐180. Two‐dimensional (2‐D) gel electrophoresis was employed to separate otherwise indistinguishable individual cytoskeletal proteins. Western blot analysis with an antibody (IFA) that selectively labels all known intermediate filaments indicated that this 50‐kDa protein is an intermediate filament (IF). The new protein was incorporated into IF polymers in vitro. Immunoelectron microscopy confirmed that neuronal IFs contain this novel protein. These results suggest that the 50‐kDa protein is a previously unrecognized neuronal IF subunit in the lamprey. J. Comp. Neurol. 483:403–414, 2005. © 2005 Wiley‐Liss, Inc.
The assumptions behind questions in letters to advice columnists

Van der Meij (1987) suggested that there are eleven assumptions behind sincere, information-seeking questions. We examined the role of these assumptions in the genre of letters to advice columnists, which typically contain such questions. A large corpus of advice columnist letters was obtained and analyzed. Twenty-six percent of the questions in these letters violatedat least one ofvan der Meij's assumptions. Although some assumptions were frequently violated, others were rarely or never violated. Subjects were asked to provide 'goodness of question' (GOQ) ratingsfor the letters with violations, and the assumptions accountedfor a significant amount of the variance in the ratings. Further analyses indicated a linear, negative relationship between the ratings and the number of violated assumptions, suggesting that the violations have an additive effect. In a final study, we systematically manipulated three of the assumptions, and collected new GOQ ratings. Although subjects found the experimentally violated letters to be worse than the Originals, they did not provide significantly higher ratings for letters in which the violations were 'repaired'. These results suggest that van der Meij's intuitions have psychological reality, although some assumptions appear to be more consequential than others.
Comparative Analysis of QSAR Models for Predicting pKa of Organic Oxygen Acids and Nitrogen Bases from Molecular Structure

For 1143 organic compounds comprising 580 oxygen acids and 563 nitrogen bases that cover more than 17 orders of experimental pK(a) (from -5.00 to 12.23), the pK(a) prediction performances of ACD, SPARC, and two calibrations of a semiempirical quantum chemical (QC) AM1 approach have been analyzed. The overall root-mean-square errors (rms) for the acids are 0.41, 0.58 (0.42 without ortho-substituted phenols with intramolecular H-bonding), and 0.55 and for the bases are 0.65, 0.70, 1.17, and 1.27 for ACD, SPARC, and both QC methods, respectively. Method-specific performances are discussed in detail for six acid subsets (phenols and aromatic and aliphatic carboxylic acids with different substitution patterns) and nine base subsets (anilines, primary, secondary and tertiary amines, meta/para-substituted and ortho-substituted pyridines, pyrimidines, imidazoles, and quinolines). The results demonstrate an overall better performance for acids than for bases but also a substantial variation across subsets. For the overall best-performing ACD, rms ranges from 0.12 to 1.11 and 0.40 to 1.21 pK(a) units for the acid and base subsets, respectively. With regard to the squared correlation coefficient r², the results are 0.86 to 0.96 (acids) and 0.79 to 0.95 (bases) for ACD, 0.77 to 0.95 (acids) and 0.85 to 0.97 (bases) for SPARC, and 0.64 to 0.87 (acids) and 0.43 to 0.83 (bases) for the QC methods, respectively. Attention is paid to structural and method-specific causes for observed pitfalls. The significant subset dependence of the prediction performances suggests a consensus modeling approach.
The Differential Empowering Effects of Europeanization on the Autonomy of National Agencies

This article examines the influence of Europeanization on the relationship between ministries and agencies at the national level. The core argument is that the differentiated nature of the international environment (with policy development often transferred to the international level and policy implementation left at the national level) transforms national agencies into policy-developing actors that shape policies without being directly influenced by their national political principals. The increasingly common involvement of national agencies in European policymaking processes thereby increases these agencies' policy-development autonomy but does not change their role in policy implementation. We examine this argument by testing an innovative hypothesis—the differentiation hypothesis—on a combined data set of German and Dutch national agencies. Our empirical findings support the hypothesis in both countries, suggesting that similar effects can be expected in other contexts in which semiautonomous agencies are involved in transnational policymaking.
Antimicrobial susceptibility of invasive pneumococcal isolates from a region in south-west Sweden 1998–2001

Invasive disease caused by antibiotic resistant pneumococci is a worldwide problem. All invasive pneumococcal strains in an area of south-west Sweden with 1.7 million inhabitants were collected prospectively during 1998–2001. Minimum inhibitory concentrations (MICs) were determined by E-test and correlated to serotypes and clinical characteristics. Of 827 strains, 744 (90%) were susceptible (S) to all agents tested and 83 (10%) were indeterminate (I) or resistant (R) to at least 1 agent. 22 isolates (2.7%) were I to penicillin (MIC >0.06 to ≤1.0 mg/l), but none were R (MIC >1.0 mg/l). Numbers and proportions of decreased susceptibility against other agents tested were as follows: erythromycin R: 30 (3.6%), clindamycin R: 6 (0.7%), tetracycline R: 16 (1.9%), moxifloxacin R: 1 (0.1%), cotrimoxazole I: 17 (2%) and R: 31(4%). Non-susceptibility to at least 1 agent was not correlated with age, clinical manifestation, underlying diseases and outcome. The serotype distribution differed between non-susceptible and susceptible strains. The serotypes in the 7-valent pneumococcal conjugate vaccine covered 42% of all infections and 73% of those caused by non-susceptible strains. In conclusion, the impact of antibiotic resistance in invasive pneumococcal disease remains limited in south-west Sweden.
Wall Street’s Bailout Bet: Market Reactions to House Price Releases in the Presence of Bailout Expectations

The rise and subsequent collapse of US house prices was one of the factors underlying the recent financial crisis. One could expect that the crisis brought increased attention to the housing market and thus led to stronger market reactions to house price news. We find that reactions indeed change, but with a peculiar twist: from September 2008 on, good news from the housing market are associated with falling US stock prices, and vice versa. The likely explanation, for which we provide cross-sectional evidence, is that falling house prices increased the market’s trust in a government bailout, thereby increasing market valuations of firms that were expected to benefit from government rescue measures.
The Role and Impact of Trade Union Equality Representatives in Britain

Drawing on data from the first national survey of trade union equality representatives, this article assesses the role and impact of equality representatives in Britain. While the majority of equality representatives report having had a positive impact on employer equality practice, the analysis also suggests that equality representative effectiveness might be enhanced via the introduction of statutory rights to time off. In addition, it points to the need for unions to include equality on the bargaining agenda, attract new representatives to the role, and ensure that equality representatives have the confidence and skills to represent members effectively within grievance procedures. It also suggests an important role for the government in encouraging employers to engage in meaningful dialogue with equality representatives.
Private equity and the UK market: some “real” concerns

Purpose – The paper aims to look at the growth of private equity and to consider the concerns that the public and media have raised, as well as the response to these concerns.Design/methodology/approach – This article is an opinion piece based on current and recent trends.Findings – It is difficult to ascertain whether the publics’ concerns are real or are media lead. The tax changes have also caused concern in the private equity business with a belief that they will drive investors out of the UK market and reduce the competitiveness and attractiveness of the UK for the private equity investor.Originality/value – The key may involve more transparency in the private equity industry as this may help resolve some of the growing public and political distrust. The paper also suggests that to attain a better understanding in this area, the competitive position of the UK market needs to be recognised.
A Revealed Preference Analysis of Friedman and Schwartz Money

In their seminal series of books Friedman and Schwartz concluded that the appropriate assets to aggregate into money are currency, demand deposits and time deposits issued by commercial banks. For this paper I used revealed preference analysis to test the validity of this conclusion. I find that these financial assets pass tests for the existence of a monetary aggregate consistent with the economic theory of aggregation over goods. For a short period after World War II, the data are consistent with a more broadly defined monetary aggregate. A reputable index number like the Divisia index must be employed to form these assets into an aggregate consistent with the economic theory of aggregation. Copyright 1995 by Ohio State University Press.