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Matched Sample (matched + sample)
Selected AbstractsUnderpricing of Foreign and Domestic IPOs in the U.S. Market: Empirical EvidenceFINANCIAL MARKETS, INSTITUTIONS & INSTRUMENTS, Issue 1 2001Bill Francis Although the underpricing of initial public offerings (IPOs) has been well documented, the underpricing of foreign IPOs have received relatively little attention. In a comparative analysis of foreign and domestic IPOs in the U.S. market for the 1990-1993 period, we find that for a matched sample, foreign IPOs are significantly more underpriced. Our results are consistent with the models developed by Rock (1986), Beatty and Ritter (1986), and Carter and Manaster (1990). Examination of the characteristics of foreign IPOs reveals that they are more likely to be larger in size, employ more prestigious underwriters and are much more likely to list on the New York Stock Exchange (NYSE). [source] Evidence on Value Creation in the Financial Services Industries through the Use of Joint Ventures and Strategic AlliancesFINANCIAL REVIEW, Issue 2 2003Kimberly C. Gleason G21/G29/G14 Abstract While an extensive body of literature has examined merger, acquisition, and consolidation activity in commercial banks and other financial services firms, little attention has been paid to examining how these institutions use the cooperative activities of joint ventures and strategic alliances to accomplish their growth objectives. We analyze the effects of the use of joint ventures and strategic alliances by a sample of firms in the banking, investment services, and insurance industries. Our results show that commercial banks, investment services firms, and insurance companies experience significant abnormal returns of 0.66% on average when they announce their participation in a joint venture or strategic alliance. These abnormal returns are significantly positive across the four strategic motives of domestic, international, horizontal, and diversifying cooperative activities. Using a matched sample, we also show that our sample firms enjoy significant, positive, abnormal returns for holding periods of six, 12, and 18 months after the announcement of the cooperative activity. [source] Closing the circle: participant views of a 360 degree feedback programmeHUMAN RESOURCE MANAGEMENT JOURNAL, Issue 1 2001Christopher Mabey The use of 360 degree feedback is becoming increasingly commonplace in organisations. It is claimed that this programme offers a more rounded diagnosis of development needs resulting in more effective development plans for individuals and more strategically focused investment in training for the organisation as a whole. These claims are tested in a qualitative and quantitative field study of participants in a 360 degree programme for middle and senior managers at a UK university. Some elements of the programme are found to work better than others, but participants rate their experience of almost all aspects of training and development as significantly better than a matched sample of non-participants, and this leads to more positive global evaluations of the employer. The implications for the use of 360 degree programmes are discussed with regard to the critical HRM literature. [source] Clinical and Economic Outcomes of Infants Receiving Breast Milk in the NICUJOURNAL FOR SPECIALISTS IN PEDIATRIC NURSING, Issue 1 2001Amy J. Barton ISSUES AND PURPOSE. This study compared clinical and economic outcomes for infants who were exclusively fed breast milk and infants who were fed commercial formula. DESIGN AND METHODS. A retrospective medical record review from a regional neonatal intensive care unit (N = 80) using consultation logs from the lactation coordinator and a matched sample of formula-fed infants. RESULTS. Neither clinical (weight gain, length of stay, days of parenteral nutrition) nor economic outcomes (direct variable costs, net revenue) differed significantly between the groups. PRACTICE IMPLICATIONS. While it may not be possible to demonstrate sufficient cost savings while the infant resides within the NICU to justify a lactation coordinator, long-term clinical and economic outcomes may be sensitive to this specialized nursing service. [source] Obesity in adults with Down syndrome: a case,control studyJOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 2 2005C. A. Melville Abstract Background Obesity has a negative impact upon mortality and morbidity. Studies report that obesity is more prevalent in individuals with Down syndrome than individuals with intellectual disabilities (ID) not associated with Down syndrome. However, there have been no studies using a methodology of matched comparison groups and findings from previous studies are contradictory. Methods A detailed method was used to identify all adults with ID in Leicestershire. Individuals were invited to participate in a medical examination , that included measurement of their height and weight, from which body mass index (BMI) was calculated. For each person with Down syndrome, an individual matched for gender, age and accommodation type was identified, from the Leicestershire ID database. Results The data for 247 matched pairs is reported. Women with Down syndrome had lower mean height and weight, but greater mean BMI than the matched pairs. Men with Down syndrome had a lower mean height and weight but there was no statistical difference in BMI compared to the matched pairs. Using World Health Organization categories of BMI, women with Down syndrome were more likely to be overweight or obese than their matched pairs (odds ratio = 2.17). Men with Down syndrome were more likely to be in the overweight category than their matched pairs but were less likely to be obese (odds ratio = 0.85). Conclusions This study demonstrates that, compared to a matched sample, there is a greater prevalence of obesity amongst women with Down syndrome but not men. As the impact on the health of people with Down syndrome of being overweight or obese is uncertain, this is an area that requires further study. [source] Interactive effects of impression management and organizational politics on job performanceJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 5 2004Suzanne Zivnuska The purpose of this research was to explore the interactive effect of organizational politics and impression management on supervisor ratings of employee performance. We hypothesized that the negative relationship between organizational politics and supervisor-rated performance is weaker among employees who are high in impression management than among those low in impression management. Data were collected from a matched sample of 112 white-collar employees and their supervisors. Results indicated that the interaction of organizational politics and impression management explained a significant incremental amount of variance in supervisor ratings of employee performance. These findings demonstrated that the extent to which an individual engaged in impression management in a non-political atmosphere may have been a key component to receiving favorable performance ratings. Copyright © 2004 John Wiley & Sons, Ltd. [source] Interactive effects of personality and organizational politics on contextual performanceJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 8 2002L. A. Witt The authors explored the process of evaluating contextual performance in the context of a politically charged atmosphere. They hypothesized that the negative relationship between perceptions of organizational politics and contextual performance is weaker among workers high in three of the Big Five model of personality dimensions,agreeableness, extraversion, and conscientiousness. Data were collected from a matched sample of 540 supervisors and subordinates employed in the private sector. Results indicated that the interaction of politics and the personality dimension of agreeableness explained a significant incremental amount of variance in the interpersonal facilitation facet of contextual performance. These findings demonstrate the need to consider both the situation and the person as antecedents of contextual performance. Copyright © 2002 John Wiley & Sons, Ltd. [source] Identifying the best companies for leaders: does it lead to higher returns?MANAGERIAL AND DECISION ECONOMICS, Issue 1 2010Greg Filbeck Since 2002, Chief Executive magazine, in conjunction with the Hay Group, has published a list of the Top 20 Companies for Leaders. In this paper, we examine the performance of those companies listed as being the best for leaders. We examine the announcement impact on share price associated with the press releases for firms included in the list and holding period returns between subsequent survey releases. While we generally do not find a significant difference in the performance of the Best Leader sample compared with either the market or the matched sample, we do find that the Best Leader sample outperforms other benchmarks on a raw and risk-adjusted basis during times of high market volatility. Copyright © 2009 John Wiley & Sons, Ltd. [source] Central kiloparsec of Seyfert and inactive host galaxies: a comparison of two-dimensional stellar and gaseous kinematicsMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Issue 4 2007Gaëlle Dumas ABSTRACT We investigate the properties of the two-dimensional distribution and kinematics of ionized gas and stars in the central kiloparsec of a matched sample of nearby active (Seyfert) and inactive galaxies, using the SAURON integral field unit on the William Herschel Telescope. The ionized gas distributions show a range of low-excitation regions, such as star formation rings in Seyfert and inactive galaxies, and high-excitation regions related to photoionization by the active galactic nucleus (AGN). The stellar kinematics of all galaxies in the sample show regular rotation patterns typical of disc-like systems, with kinematic axes that are well aligned with those derived from the outer photometry and provide a reliable representation of the galactic line of nodes. After removal of the non-gravitational components due to, for example, AGN-driven outflows, the ionized gas kinematics in both the Seyfert and inactive galaxies are also dominated by rotation with global alignment between stars and gas in most galaxies. This result is consistent with previous findings from photometric studies that the large-scale light distribution of Seyfert hosts is similar to that of inactive hosts. However, by fully exploiting the two-dimensional nature of our spectroscopic data, deviations from axisymmetric rotation in the gaseous velocity fields are identified, which suggest that the gaseous kinematics are more disturbed at small radii in the Seyfert galaxies compared with the inactive galaxies. This provides a tentative link between nuclear gaseous streaming and nuclear activity. [source] Musculoskeletal pain in ragpickers in a southern city in BrazilAMERICAN JOURNAL OF INDUSTRIAL MEDICINE, Issue 5 2006Marcelo C. da Silva MSc Abstract Background Ragpickers are informal workers who collect recyclable materials to earn a small wage. Their life and working conditions are extremely precarious. The ergonomic hazards and musculoskeletal pain in a sample of ragpickers in Pelotas, a city in southern Brazil are examined. Methods Two comparison groups were available: a matched sample of non-ragpickers from the same poor neighborhoods, and a random sample of the general population of the city. The cross-sectional study gathered data by interview on 990 individuals in 2004. Musculoskeletal pain was assessed using the Standardized Nordic Questionnaire. Results Ragpickers reported higher prevalences for most awkward postures and ergonomic exposures compared to neighbors with other demanding manual jobs. The prevalence within the last 12 months of low back pain (LBP), lower extremity pain (LEP), and upper extremity pain (UEP) among ragpickers were 49.2%, 45.1%, and 34.9%, respectively; levels similar to those reported by neighborhood controls. Both ragpickers and non-ragpickers reported considerably higher ergonomic exposures, and more prevalent LBP, than the general population. Conclusions Ragpickers experience many occupational hazards and ergonomic stressors. Their overall prevalence of musculoskeletal pain was similar to a comparison group with other physically demanding manual jobs. For LBP, this prevalence was substantially higher (49% vs. 35%) than in the general population. Am. J. Ind. Med. 49:327,336, 2006. © 2006 Wiley-Liss, Inc. [source] Different resistance mutations can be detected simultaneously in the blood and the lung of HIV-1 infected individuals on antiretroviral therapyJOURNAL OF MEDICAL VIROLOGY, Issue 3 2004Natalie C. White Abstract In this retrospective study, matched peripheral blood and lung samples from patients on antiretroviral therapy were studied in order to investigate whether differences in mutations associated with resistance to nucleoside analogues could be detected between the lung and blood. Discordant mutation patterns in the reverse transcriptase (RT) between plasma and cell free bronchoalveolar lavage fluid (BAL-fluid) HIV-1 genomic RNA was observed in five out of seven patients on nucleoside reverse transcriptase inhibitor (NRTI) monotherapy and six out of seven on combination therapy. In the cellular compartments, DNA recovered from peripheral blood mononuclear cells (PBMCs) and cells from BAL-cells discordant HIV-1 resistance genotypes were detected in 15 out of 44 matched samples. Differences in resistant genotypes between PBMCs and BAL-cells were most pronounced in patients receiving combination antiretroviral therapy. The pattern and number of mutations in RT associated with resistance differed in the BAL-cells compared to PBMCs in four out of 12 subjects not receiving antiretroviral therapy at the time of bronchoscopy, three from 14 patients on NRTI monotherapy, five out of nine on dual combination therapy and three out of nine on HAART. The differences in the detection of resistance mutations between blood and the lung suggest that the lung is a site of replication for HIV-1. J. Med. Virol. 72:352,357, 2004. © 2004 Wiley-Liss, Inc. [source] A comparative study of transformational leadership in nursing development units and conventional clinical settingsJOURNAL OF NURSING MANAGEMENT, Issue 2 2000A. Bowles RMN Aims This is a comparative study of the leadership provided by nurse managers and leaders in Nursing Development Units and conventional clinical settings in England. Background Nursing development units (NDUs) were originally conceived as centres of nursing excellence, innovation and leadership development. This article describes the first published use of a leadership practices inventory (LPI) explicitly based upon a model of transformational leadership. This style of leadership has been commended as highly effective and suitable for nursing. Methods The use of the LPI was piloted as a postal questionnaire and as a schedule for telephone interviewing, these pilots supported the use of telephone interviewing in the main study. Two matched samples of 70 nurses in total were recruited from across England, comprising 14 nurse leaders and 56 of their day to day colleagues. Data was collected by telephone interviewing over a 6-week period between February and April 1998. Six null hypotheses were developed to identify significant inter-group differences in leadership behaviour. Descriptive and inferential data analysis techniques were employed using SPSS for Windows. Findings The leadership provided by NDU leaders was evaluated more highly than non-NDU leaders. A higher level of congruence between self and observer evaluations was shown by NDU leaders. Statistically significant inter-group differences were apparent in three of the five practices of exemplary leadership and in the overall leadership behaviour. NDU leaders show greater self awareness and are more transformational than their non-NDU counterparts. The limitations of the study design are discussed. Conclusions NDU leaders provide leadership of a more transformational nature than their counterparts working in conventional settings. This finding suggests that NDU leaders have enhanced leadership potential and that formalizing nursing development within NDUs may promote the emergence of transformational leadership and provide a microculture in which it might flourish. The LPI is regarded as a useful, adaptable tool suitable for use in UK nursing applications including research, leadership development and education. [source] The sizes of disc galaxies in intermediate-redshift clustersMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: LETTERS (ELECTRONIC), Issue 1 2007S. P. Bamford ABSTRACT We examine how the location of star formation within disc galaxies depends on environment at intermediate redshift. This is achieved by comparing emission-line (rem) and rest-frame B -band (rB) scalelengths for matched samples of 50 field and 19 cluster, star-forming, disc galaxies, with 0.25 ,z, 1.0 and MB,,19.5 mag. We find that at a given rB the majority of our cluster galaxies have rem smaller than those in the field, by 25 per cent on average. These results are compared with studies of local galaxies, which find a very similar behaviour. From the relations of rem and rB versus B -band absolute magnitude (MB) we infer that the difference between the intermediate- z cluster and field samples is mostly attributable to variation in rem at a given MB, while the rB versus MB relation is similar for the two samples. [source] Sleep Disordered Breathing in Renal Transplant PatientsAMERICAN JOURNAL OF TRANSPLANTATION, Issue 6 2009F. Mallamaci Sleep disordered breathing (SDB) is a prevalent, important nontraditional cardiovascular (CV) risk factor in end-stage renal disease patients. The prevalence of SDB in renal transplant patients is unknown. We compared polysomnographic studies in 163 transplant patients with matched samples in the general population and explored longitudinally the effect of return to dialysis after graft failure on SDB in three consecutive cases. Episodes of nocturnal hypoxemia, average and minimal O2 saturation overnight in transplant patients did not differ from those in individuals in the general population matched for age, gender and body mass index (BMI). The prevalence of moderate-to-severe SBD in these patients did not exceed the estimated prevalence of the same disturbance in the general population. The respiratory disturbance index in transplant patients was directly associated with BMI (p < 0.001). In the longitudinal study all indicators of SDB coherently increased after transplant failure. The prevalence of SDB in transplant patients does not differ from that in well-matched individuals in the general population. The favorable effect of renal transplantation on CV risk may be at least partially explained by the lack of risk excess for SDB in this population. Longitudinal observations after transplant failure are compatible with the hypothesis that renal transplantation reverses SDB. [source] Fetal activin A: associations with labour, umbilical artery pH and neonatal outcomeBJOG : AN INTERNATIONAL JOURNAL OF OBSTETRICS & GYNAECOLOGY, Issue 4 2004Stephen Tong Objective To define the ontogeny of umbilical artery activin A at term and to evaluate activin A as a potential marker of perinatal hypoxia. Design A cohort study. Setting A university teaching hospital delivery suite. Population A convenience sample of 141 term pregnancies. Methods At delivery, umbilical artery and vein bloods were collected for blood gas measurements and subsequent measurement of activin A. Activin A levels were correlated with blood gas measurements and with labour and neonatal outcomes. Main outcome measures Umbilical arterial activin A and pH. Results The median (95% CI) umbilical arterial activin A level at delivery was 1.38 (1.34,1.70) ng/mL. Levels varied significantly across gestation (P= 0.03), increasing from 36 to 38 weeks, thereafter decreasing to a nadir at 41 weeks. In 60 matched samples, the median (95% CI) venous and arterial activin A levels were 0.89 (0.81,1.06) ng/mL and 1.38 (1.21,1.61) ng/mL, respectively (P < 0.0001). Mean umbilical arterial pH was 7.20 (7.06,7.38; 5,95th centiles) and was not significantly correlated with log10 activin A (r=, 0.01; P= 0.68). Compared with healthy controls, there was no difference in arterial activin A in neonates identified as having suffered significant intrapartum asphyxia (P= 0.96). Fetal activin A levels were significantly lower in cases delivered by emergency caesarean section for complications during the first stage of labour compared with cases delivered vaginally (P= 0.003). Conclusions Umbilical artery activin A does not appear to be a sensitive marker of fetal oxygenation or of risk of hypoxic,ischaemic encephalopathy. [source] | ||||||||||||||||