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Measures
Kinds of Measures Terms modified by Measures Selected AbstractsTreatment of Surgical Scars with Nonablative Fractional Laser Versus Pulsed Dye Laser: A Randomized Controlled TrialDERMATOLOGIC SURGERY, Issue 8 2009EMILY TIERNEY MD OBJECTIVE Comparison of the efficacy of nonablative fractional laser (NAFL) and the V-beam pulsed dye laser (PDL) for improvement of surgical scars. METHODS A randomized blinded split-scar study. Fifteen scars in 12 patients were treated a minimum of 2 months after Mohs surgery. Patients were treated on half of the scar with a 1,550-nm NAFL and on the contralateral half with the 595 nm PDL. MAIN OUTCOME MEASURE(S) A nontreating physician investigator evaluated the outcome of the scar in terms of scar dyspigmentation, thickness, texture, and overall cosmetic appearance (5-point grading scale). RESULTS After a series of four treatments at 2-week intervals, greater improvements were noted in the portion of surgical scars treated with NAFL (overall mean improvement 75.6%, range 60,100%, vs. PDL, 53.9%, range 20,80%; p<.001). CONCLUSION These data support the use of NAFL as a highly effective treatment modality for surgical scars, with greater improvement in scar appearance than with PDL. It is likely that the greater depth of penetration and focal microthermal zones of injury with NAFL, inducing neocollagenesis and collagenolysis, account for its greater improvement in scar remodeling. These encouraging results lead us to recommend that NAFL be added to the current treatment armamentarium for surgical scars. [source] PROPOSAL FOR A NEW MEASURE OF CORRUPTION, ILLUSTRATED WITH ITALIAN DATAECONOMICS & POLITICS, Issue 1 2005Miriam A. Golden Standard cross-national measures of corruption are assembled through surveys. We propose a novel alternative objective measure that consists of the difference between a measure of the physical quantities of public infrastructure and the cumulative price government pays for public capital stocks. Where the difference is larger between the monies spent and the existing physical infrastructure, more money is being siphoned off to mismanagement, fraud, bribes, kickbacks, and embezzlement; that is, corruption is greater. We create this measure for Italy's 95 provinces and 20 regions as of the mid-1990s, controlling at the regional level for possible differences in the costs of public construction. [source] EVIDENCE FOR THE VALIDITY OF THE AMERICAN MEDICAL ASSOCIATION'S CAREGIVER SELF-ASSESSMENT QUESTIONNAIRE AS A SCREENING MEASURE FOR DEPRESSIONJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 2 2010Gary Epstein-Lubow MD No abstract is available for this article. [source] Afraid in the hospital: Parental concern for errors during a child's hospitalization,,§JOURNAL OF HOSPITAL MEDICINE, Issue 9 2009Beth A. Tarini MD Abstract OBJECTIVE: (1) To determine the proportion of parents concerned about medical errors during a child's hospitalization; and (2) the association between this concern and parental self-efficacy with physician interactions. STUDY DESIGN: Cross-sectional survey. SETTING: Tertiary care children's hospital. PARTICIPANTS: Parents of children admitted to the general medical service. OUTCOME MEASURE: Parental concern about medical errors. METHODS: Parents were asked their agreement with the statement "When my child is in the hospital I feel that I have to watch over the care that he/she is receiving to make sure that mistakes aren't made." We used multivariate logistic regression to examine the association between parents' self-efficacy with physician interactions and the need "to watch over a child's care," adjusting for parent and child demographics, English proficiency, past hospitalization, and social desirability bias. RESULTS: Of 278 eligible parents, 130 completed surveys and 63% reported the need to watch over their child's care to ensure that mistakes were not made. Parents with greater self-efficacy with physician interactions were less likely to report this need (odds ratio [OR], 0.83; 95% confidence interval [CI], 0.72-0.92). All parents who were "very uncomfortable" communicating with doctors in English reported the need to watch over their child's care to prevent mistakes. CONCLUSIONS: Nearly two-thirds of surveyed parents felt the need to watch over their child's hospital care to prevent mistakes. Parents with greater self-efficacy with physician interactions were less likely to report the need to watch over their child's care while parents with lower English proficiency were more likely to report this need. Journal of Hospital Medicine 2009;4:521,527. © 2009 Society of Hospital Medicine. [source] ASSET PRICING WITH NO EXOGENOUS PROBABILITY MEASUREMATHEMATICAL FINANCE, Issue 1 2008Gianluca Cassese In this paper, we propose a model of financial markets in which agents have limited ability to trade and no probability is given from the outset. In the absence of arbitrage opportunities, assets are priced according to a probability measure that lacks countable additivity. Despite finite additivity, we obtain an explicit representation of the expected value with respect to the pricing measure, based on some new results on finitely additive measures. From this representation we derive an exact decomposition of the risk premium as the sum of the correlation of returns with the market price of risk and an additional term, the purely finitely additive premium, related to the jumps of the return process. We also discuss the implications of the absence of free lunches. [source] MORE ON MINIMAL ENTROPY,HELLINGER MARTINGALE MEASUREMATHEMATICAL FINANCE, Issue 1 2006Tahir Choulli This paper extends our recent paper (Choulli and Stricker 2005) to the case when the discounted stock price process may be unbounded and may have predictable jumps. In this very general context, we provide mild necessary conditions for the existence of the minimal entropy,Hellinger local martingale density and we give an explicit description of this extremal martingale density that can be determined by pointwise solution of equations in depending only on the local characteristics of the discounted price process S. The uniform integrability and other integrability properties are investigated for this extremal density, which lead to the conditions of the existence of the minimal entropy,Hellinger martingale measure. Finally, we illustrate the main results of the paper in the case of a discrete-time market model, where the relationship of the obtained optimal martingale measure to a dynamic risk measure is discussed. [source] AN EMPIRICAL ANALYSIS OF MEASUREMENT EQUIVALENCE WITH THE INDCOL MEASURE OF INDIVIDUALISM AND COLLECTIVISM: IMPLICATIONS FOR VALID CROSS-CULTURAL INFERENCEPERSONNEL PSYCHOLOGY, Issue 1 2006CHRISTOPHER ROBERT The INDCOL measure of individualism and collectivism (Singelis et al., 1995) has been used increasingly to test complex cross-cultural hypotheses. However, sample differences in translation, culture, organization, and response context might threaten the validity of cross-cultural inferences. We systematically explored the robustness of the INDCOL, for various statistical uses, in the face of those 4 threats. An analysis of measurement equivalence using multigroup mean and covariance structure analysis compared samples of INDCOL data from the United States, Singapore, and Korea. The INDCOL was robust with regard to the interpretability of correlations, whereas differences in culture and translation pose an important potential threat to the interpretability of mean-level analyses. Recommendations regarding the interpretation of the INDCOL and issues in the analysis of measurement equivalence in cross-cultural research are discussed. [source] A NEW MEASURE OF US POTENTIAL OUTPUT, INFLATION FORECASTS, AND MONETARY POLICY RULES,THE MANCHESTER SCHOOL, Issue 5 2009CHARLES HARVIE This paper proposes a new measure of potential output for the USA. The key idea is that potential output is constructed as the level of output which would correspond to a forecast of no inflation change over the policy horizon. The resultant output gap has a clear interpretation as a measure to gauge future inflationary pressures. It also exhibits better predictability for future inflation changes in comparison with previous output gap measures. Simulation results further demonstrate its usefulness as a feedback variable in the Taylor monetary policy rule for interest rates. [source] MUTUAL VERSUS PROPRIETARY OWNERSHIP: AN EMPIRICAL STUDY FROM THE UK UNIT TRUST INDUSTRY WITH A COMPANY-PRODUCT MEASUREANNALS OF PUBLIC AND COOPERATIVE ECONOMICS, Issue 2 2010Yoshikatsu Shinozawa ABSTRACT,:,In the debate of the relative merits of differing ownership forms, most empirical studies examine either corporate performance or the product characteristics of the financial products that are available in the financial services industry. Based on the UK unit trust industry, this paper assesses which ownership form, mutual or proprietary is more efficient in managing unit trust operations and providing high return generating unit trusts. Using a combined corporate performance and product range performance metric, this study reveals no significant differences between the two ownership forms in terms of the corporate-product performance score. The results indicate that the owner-customer fused role in the mutual organization must be considered in the mutual versus proprietary ownership debate. [source] GOAL ATTAINMENT SCALING: AN EFFECTIVE OUTCOME MEASURE FOR RURAL AND REMOTE HEALTH SERVICESAUSTRALIAN JOURNAL OF RURAL HEALTH, Issue 5 2002Ruth Cox ABSTRACT: The aim of this paper is to demonstrate the utility of Goal Attainment Scaling (GAS) as an effective, multidisciplinary measure of client outcomes for rural and remote health services. Goal Attainment Scaling was adopted by the Spinal Outreach Team (SPOT) as a client-focussed evaluation tool, as it is sensitive to the individual nature of clients' presenting issues and the multidisciplinary focus of the team. It enables individualised goals to be set on a five-point scale. Goal Attainment Scaling was introduced to the SPOT service after a pilot trial established guidelines for its effective implementation. An ongoing review process ensures that goal scaling remains realistic and relevant. Service outcomes can be effectively summarised using a frequency distribution of GAS scores. One of the important benefits of GAS is its facilitation of collaborative goal setting between clinician and client. Goal Attainment Scaling is recommended to rural and remote multidisciplinary health services because of its ability to summarise outcomes from heterogeneous service activities. [source] A NEW AGENT MATCHING SCHEME USING AN ORDERED FUZZY SIMILARITY MEASURE AND GAME THEORYCOMPUTATIONAL INTELLIGENCE, Issue 2 2008Hamed Kebriaei In this paper, an agent matching method for bilateral contracts in a multi-agent market is proposed. Each agent has a hierarchical representation of its trading commodity attributes by a tree structure of fuzzy attributes. Using this structure, the similarity between the trees of each pair of buyer and seller is computed using a new ordered fuzzy similarity algorithm. Then, using the concept of Stackelberg equilibrium in a leader,follower game, matchmaking is performed among the sellers and buyers. The fuzzy similarities of each agent with others in its personal viewpoint have been used as its payoffs in a bimatrix game. Through a case study for bilateral contracts of energy, the capabilities of the proposed agent-based system are illustrated. [source] EXPANDED ACCESS TO SEPs AND OTHER HARM REDUCTION MEASURES IN FRANCEADDICTION, Issue 9 2009MARIA PATRIZIA CARRIERI No abstract is available for this article. [source] Comparisons of Self-Reported and Chart-Identified Chronic Diseases in Inner-City SeniorsJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 7 2009John Leikauf BA OBJECTIVES: To examine agreement between self-report of chronic disease and medical record data for inner-city seniors, their sensitivity and specificity, and the association between patient characteristics and accuracy of self-reports. DESIGN: Cross-sectional analysis. SETTING: Two hospital-based primary care practices serving a low-income inner-city population. PARTICIPANTS: Adults aged 65 and older (n=323). MEASURES: Data on self-reported asthma, depression, diabetes mellitus, and hypertension were collected through interviewer-administered surveys (in English and Spanish) and chart abstraction. Chart-based disease was defined in two ways: physician documentation and physician documentation plus use of a medication to treat that condition. Sensitivity, specificity, and agreement were calculated. Univariate and multivariable regression analyses were used to determine the associations between patient characteristics and patient,chart agreement. RESULTS: Agreement between self-report and chart data was high for diabetes mellitus (kappa=0.94) intermediate for asthma (kappa=0.66), and hypertension (kappa=0.54) and low for depression (kappa=0.4). Sensitivity and specificity were high for diabetes mellitus (0.99 and 0.96, respectively) and low for depression (0.74 and 0.72, respectively). Specificity for hypertension was lowest (0.67). Age, education, health literacy, and other patient characteristics did not have clear associations across conditions. CONCLUSION: Self-reports may be most reliable for diabetes mellitus and least reliable for depression for surveys involving older, inner-city adults. Survey research with older adults should include confirmatory data when assessing presence of depression, hypertension, and asthma. [source] Prevalence of Constipation Symptoms in Fecally Incontinent Nursing Home ResidentsJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 4 2009John F. Schnelle PhD OBJECTIVES: To determine the prevalence of constipation symptoms and the effects of a brief toileting assistance trial on constipation in a sample of fecally incontinent nursing home (NH) residents. DESIGN: Observational study. SETTING: Five NHs. PARTICIPANTS: One hundred eleven fecally incontinent NH residents. MEASURES: Research staff measured bowel movement frequency every 2 hours for 10 days. The following week, residents were offered toileting assistance every 2 hours for 2 days to determine resident straining, time required for a bowel movement, and resident perceptions of feeling empty after a bowel movement. Constipation data were abstracted from the medical record. RESULTS: The frequency of bowel movements during usual NH care was low (mean=0.32 per person per day), and most episodes were incontinent. The frequency of bowel movements increased significantly, to 0.82 per person per day, and most episodes were continent during the 2 days that research staff provided toileting assistance. Eleven percent of residents showed evidence of straining, and 21% of the time after a continent bowel movement, residents reported not feeling empty. Five percent of participants had medical record or Minimum Data Set documentation indicative of constipation symptoms. CONCLUSION: Low rates of bowel movements during the day that are potentially indicative of constipation were immediately improved during a 2-day trial of toileting assistance in approximately 68% of the residents, although other symptoms of constipation remained in a subset of residents who increased toileting frequency. [source] The Contribution of Foot Problems to Mobility Impairment and Falls in Community-Dwelling Older PeopleJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 12 2001Hylton B. Menz B Pod (Hons) OBJECTIVES: To investigate the relationship between foot problems, balance, and functional ability in community-dwelling older people and to determine whether older people with a history of multiple falls exhibit greater foot impairment than those who have not fallen or who have fallen once only. DESIGN: A cross-sectional, retrospective study. SETTING: Falls and Balance Laboratory, Royal North Shore Hospital, Sydney, Australia. PARTICIPANTS: One hundred thirty-five community-dwelling men and women age 75 to 93 (mean age ± standard deviation, 79.8 ± 4.1). MEASURES: Foot problem score; postural sway; coordinated stability; stair ascent and descent; an alternate stepping test; timed 6-meter walk; and tests of vision, sensation, strength, and reaction time. RESULTS: Eighty-seven percent of the sample had at least one foot problem. Women had a significantly higher foot problem score than did men. The foot problem score was significantly associated with performance on the coordinated stability test, stair ascent and descent, alternate stepping test, and timed 6-meter walk. Multiple regression analyses revealed that the foot problem score was a significant independent predictor of performance in the coordinated stability test, stair ascent and descent, and the alternate stepping test. Subjects with a history of multiple falls had a significantly higher foot problem score than did those who had not fallen or who had fallen once only, but the prevalence of individual foot conditions or the presence of foot pain did not differ between these groups. CONCLUSIONS: Foot problems are common in older people and are associated with impaired balance and performance in functional tests. Furthermore, older people with a history of multiple falls have greater foot impairment than non- or once-only fallers. These findings provide further evidence that foot problems are a falls risk factor and suggest that the cumulative effect of multiple foot problems is more important in increasing falls risk than the presence or absence of individual foot conditions. [source] CASH SUBADDITIVE RISK MEASURES AND INTEREST RATE AMBIGUITYMATHEMATICAL FINANCE, Issue 4 2009Nicole El Karoui A new class of risk measures called cash subadditive risk measures is introduced to assess the risk of future financial, nonfinancial, and insurance positions. The debated cash additive axiom is relaxed into the cash subadditive axiom to preserve the original difference between the numéraire of the current reserve amounts and future positions. Consequently, cash subadditive risk measures can model stochastic and/or ambiguous interest rates or defaultable contingent claims. Practical examples are presented, and in such contexts cash additive risk measures cannot be used. Several representations of the cash subadditive risk measures are provided. The new risk measures are characterized by penalty functions defined on a set of sublinear probability measures and can be represented using penalty functions associated with cash additive risk measures defined on some extended spaces. The issue of the optimal risk transfer is studied in the new framework using inf-convolution techniques. Examples of dynamic cash subadditive risk measures are provided via BSDEs where the generator can locally depend on the level of the cash subadditive risk measure. [source] RISK MEASURES ON ORLICZ HEARTSMATHEMATICAL FINANCE, Issue 2 2009Patrick Cheridito Coherent, convex, and monetary risk measures were introduced in a setup where uncertain outcomes are modeled by bounded random variables. In this paper, we study such risk measures on Orlicz hearts. This includes coherent, convex, and monetary risk measures on Lp -spaces for 1 ,p < , and covers a wide range of interesting examples. Moreover, it allows for an elegant duality theory. We prove that every coherent or convex monetary risk measure on an Orlicz heart which is real-valued on a set with non-empty algebraic interior is real-valued on the whole space and admits a robust representation as maximal penalized expectation with respect to different probability measures. We also show that penalty functions of such risk measures have to satisfy a certain growth condition and that our risk measures are Luxemburg-norm Lipschitz-continuous in the coherent case and locally Luxemburg-norm Lipschitz-continuous in the convex monetary case. In the second part of the paper we investigate cash-additive hulls of transformed Luxemburg-norms and expected transformed losses. They provide two general classes of coherent and convex monetary risk measures that include many of the currently known examples as special cases. Explicit formulas for their robust representations and the maximizing probability measures are given. [source] COHERENT ACCEPTABILITY MEASURES IN MULTIPERIOD MODELSMATHEMATICAL FINANCE, Issue 4 2005Berend Roorda The framework of coherent risk measures has been introduced by Artzner et al. (1999; Math. Finance 9, 203,228) in a single-period setting. Here, we investigate a similar framework in a multiperiod context. We add an axiom of dynamic consistency to the standard coherence axioms, and obtain a representation theorem in terms of collections of multiperiod probability measures that satisfy a certain product property. This theorem is similar to results obtained by Epstein and Schneider (2003; J. Econ. Theor. 113, 1,31) and Wang (2003; J. Econ. Theor. 108, 286,321) in a different axiomatic framework. We then apply our representation result to the pricing of derivatives in incomplete markets, extending results by Carr, Geman, and Madan (2001; J. Financial Econ. 32, 131,167) to the multiperiod case. We present recursive formulas for the computation of price bounds and corresponding optimal hedges. When no shortselling constraints are present, we obtain a recursive formula for price bounds in terms of martingale measures. [source] II. SAMPLE AND MEASURESMONOGRAPHS OF THE SOCIETY FOR RESEARCH IN CHILD DEVELOPMENT, Issue 2 2008Article first published online: 23 JUL 200 First page of article [source] III. U.S. SAMPLE AND MEASURESMONOGRAPHS OF THE SOCIETY FOR RESEARCH IN CHILD DEVELOPMENT, Issue 4 2005Article first published online: 16 DEC 200 First page of article [source] Sites of recurrence in oral and oropharyngeal cancers according to the treatment approachORAL DISEASES, Issue 3 2003AL Carvalho OBJECTIVE: The purpose of this study is to evaluate the rates and the sites of tumour recurrence in patients with oral and oropharyngeal carcinomas. DESIGN: This is a retrospective study of a series of cases treated in a single institution. PATIENTS AND METHODS: A series of 2067 patients with oral and oropharyngeal squamous carcinoma, treated from 1954 to 1998 were analysed. The treatment approach was: surgery, 624 cases (30.2%); radiotherapy alone, 729 cases (35.3%); radiotherapy and surgery, 552 cases (26.7%) and radiotherapy and chemotherapy, 162 cases (7.8%). MAIN OUTCOME MEASURES: Tumour recurrence was observed in 1079 patients (52.2%): 561 cases of local recurrences (27.1%); 168 neck recurrences (8.1%); 252 locoregional recurrences (12.2%); 59, distant metastasis (2.9%) and 39 (1.9%), combination of distant metastasis with local, neck or locoregional recurrence. RESULTS: The rates of recurrence varied significantly according to the treatment performed. Oral cavity cancer patients undergoing radiotherapy alone or in combination with chemotherapy presented the highest rates of neck recurrences (22.5 and 40.0%, respectively) for clinical stage (CS) I/II and of local (41.2 and 30.1%) and locoregional (21.7 and 31.1%) recurrences for CS III/IV; yet, for CS III/IV, surgery without neck dissection was associated with the highest rates of neck recurrences (20.7%), but no differences were observed in the rates of local or locoregional recurrences for CS I/II patients. For oropharynx cancer patients with CS I/II there was no difference in the rate of locoregional failures according to the treatment. However, patients with CS III/IV undergoing radiotherapy present a highest rate of local (42.3%) and locoregional (28.8%) failures. CONCLUSION: The results suggest that surgery should be the first option for initial clinical stage oral and oropharyngeal cancers. For advanced cases independently of the site of the tumour, surgery and postoperative radiotherapy should be the standard of care because it is associated with the lowest rates of locoregional recurrence. [source] The influence of age on gait parameters during the transition from a wide to a narrow pathwayPHYSIOTHERAPY RESEARCH INTERNATIONAL, Issue 2 2008Nataliya Shkuratova Abstract Background and Purpose.,The ability to negotiate pathways of different widths is a prerequisite of daily living. However, only a few studies have investigated changes in gait parameters in response to walking on narrow pathways. The aim of this study is to examine the influence of age on gait adjustments during the transition from a wide to a narrow pathway.,Method.,DESIGN: Two-group repeated measures design. SETTING: Gait Laboratory. PARTICIPANTS: Twenty healthy older participants (mean [M] = 74.3 years, Standard deviation [SD] = 7.2 years); 20 healthy young participants (M = 26.6 years, SD = 6.1 years).,Interventions.,Making the transition from walking on a wide pathway (68,cm) to walking on a narrow pathway (15,cm). MAIN OUTCOME MEASURES: Step length, step time, step width, double support time and base of support. Results.,Healthy older participants were able to make the transition from a wide to a narrow pathway successfully. There was only one significant interaction, between age and base of support (p < 0.003). Older adults decreased their base of support only when negotiating the transition step, while young participants started decreasing their base of support prior to the negotiation of transition step (p < 0.01). Conclusion.,Adjustments to the transition from a wide to a narrow pathway are largely unaffected by normal ageing. Difficulties in making the transition to a narrow pathway during walking should not be attributed to normal age-related changes. Copyright © 2008 John Wiley & Sons, Ltd. [source] EVALUATING THE ECONOMIC COST OF ENVIRONMENTAL MEASURES IN PLANTATION HARVESTING THROUGH THE USE OF MATHEMATICAL MODELSPRODUCTION AND OPERATIONS MANAGEMENT, Issue 3 2003FELIPE CARO An important issue being discussed for Chilean pine plantation policies is the application of environmental protection measures when managing its timber areas. Typical measures, already in place in more developed countries, include imposing riparian strips and protecting fragile soils from the use of heavy machinery. While environmental protection measures have been considered vital for decades, so far there has been almost no attempt to quantify both the benefits and costs of these measures. This paper attempts to measure the costs associated with the main measures which can help both the forestry firms and the government evaluate the cost impact of the new environmental protection regulations being studied. The analysis for different environmental scenarios is carried out by modifying a mixed integer LP, currently used for tactical planning by one forestry firm. [source] MULTILEVEL DECOMPOSITION METHODS FOR INCOME INEQUALITY MEASURES,THE JAPANESE ECONOMIC REVIEW, Issue 3 2009KAZUHIKO KAKAMU This paper studies the multilevel decomposability of the respective income inequality measures proposed by Theil, Rao and Bahattacharya,Maharanobis. All the methods can be decomposed into multilevels if and only if each lower level subgroup belongs to only one particular higher level group. We found not only analytically but also empirically that the residual in the decomposed Bahattacharya,Maharanobis measure tends to increase when the decomposition levels increase. We conclude that Theil's and Rao's decompositions have advantages in empirical analysis and that the choice of the decomposition methods depends on the purpose of the analysis. [source] A NEW FAMILY OF DIVERGENCE MEASURES FOR TESTS OF FITAUSTRALIAN & NEW ZEALAND JOURNAL OF STATISTICS, Issue 2 2010K. Mattheou Summary The aim of this work is to investigate a new family of divergence measures based on the recently introduced Basu, Harris, Hjort and Jones (BHHJ) measure of divergence (Biometrika,85, 549,559). The new family is investigated in connection with hypothesis testing problems, and new test statistics are proposed. Simulations are performed to check the appropriateness of the proposed test statistics. [source] REGIONAL UNEMPLOYMENT DISPARITIES: AN EVALUATION OF POLICY MEASURES,AUSTRALIAN ECONOMIC PAPERS, Issue 4 2008N. GROENEWOLD This paper analyses the efficacy of regional and federal government policies in reducing inter-regional unemployment disparities. We use as our framework a two-region general equilibrium model with a given freely-mobile supply of labour. We assume inter-regional migration to occur in response to inter-regional utility differentials. Each region has households, firms and a regional government. In addition to regional governments, there is a federal government. The firms in a region use a single factor, labour, to produce a single good which we assume to be different to that produced in the other region. It is supplied to households and to the regional government in the form of payroll taxes. Households consume some, trade some with households in the other region and give some up to the federal government as income tax. Firms and households bargain over wages and firms then choose employment to maximise profits. The resulting equilibrium will generally not be a full-employment one. We simulate a linearised numerical version of the model. We examine seven alternative policies, six carried out by a regional government and one by the federal government. In the first group there are traditional tax/expenditure polices as well as policies which might be seen as attacking the natural rate of unemployment: changes in unemployment benefits, changes in union power, changes in the labour force and changes in labour productivity. The federal government policy is a regionally-differentiated fiscal policy. Contrary to expectations, many policies which have traditionally been recommended to alleviate unemployment are found, in fact, to exacerbate the unemployment problem. [source] Beyond Species Richness: Community Similarity as a Measure of Cross-Taxon Congruence for Coarse-Filter ConservationCONSERVATION BIOLOGY, Issue 1 2004JEFFREY C. SU Species richness is only one measure of species diversity, however, and recent studies suggest that investigations of cross-taxon congruence should consider a broader range of assessment techniques. The cross-taxon congruence of community similarity between sites among taxa has rarely been examined and may be the most relevant measure of species diversity in the context of coarse-filter conservation strategies. We examined cross-taxon congruence patterns of species richness and community similarity (Bray-Curtis similarity) among birds, butterflies, and vascular plants in montane meadow habitats in the Greater Yellowstone Ecosystem. Although patterns of species richness (Spearman rank correlation) varied between taxa, we consistently found a positive correlation in community similarity (Mantel test) between all pair-wise comparisons of the three taxa (e.g., sites with similar bird communities also had similar butterfly communities). We suggest that the success of a surrogate taxon depends on the technique used to assess surrogacy and the specific approach to conservation planning. In the context of coarse-filter conservation, measures of community similarity may be more appropriate than measures of species richness. Furthermore, the cross-taxon congruency of community similarity in our study suggests that coarse-filter conservation may be tenable in montane meadow communities. Resumen:,El uso de un taxón sustituto en la planeación de la conservación se ha vuelto cuestionable porque información reciente sugiere que la correlación de riqueza de especies entre pares de taxones es altamente variable taxonómica y geográficamente. Sin embargo, la riqueza de especies es solo una medida de la diversidad de especies, y estudios recientes sugieren que las investigaciones de congruencia trans-taxón debieran considerar una mayor variedad de técnicas de evaluación. La congruencia trans-taxón de la similitud de comunidades entre sitios entre taxones rara vez se ha examinado y puede ser la medida de diversidad de especies más relevante en el contexto de las estrategias de conservación de grano grueso. Examinamos patrones de congruencia trans-taxón de riqueza de especies y similitud de comunidades (similitud Bray-Curtis) en aves, mariposas y plantas vasculares en hábitats de praderas montanas en el Ecosistema Greater Yellowstone. Aunque los patrones de riqueza de especies (correlación Spearman de rangos) variaron entre especies, encontramos consistentemente una correlación positiva en la similitud de la comunidad (prueba de Mantel) entre todas las comparaciones de pares de los tres taxones (es decir, los sitios con comunidades similares de aves también tenían comunidades similares de mariposas). Sugerimos que el éxito de un taxón sustituto depende de la técnica utilizada para evaluar la sustitución y el abordaje específico de la planeación de conservación. En el contexto de la conservación de grano grueso, pueden ser más apropiadas las medidas de similitud de comunidades que las medidas de riqueza de especies. Más aun, la congruencia trans-taxón de similitud de comunidades en nuestro estudio sugiere que la conservación de grano grueso puede ser justificable en comunidades de praderas montanas. [source] Bushmeat Markets on Bioko Island as a Measure of Hunting PressureCONSERVATION BIOLOGY, Issue 6 2000John E. Fa Comparisons of the availability and abundance of individual species between years showed that more species and more carcasses appeared in 1996 than in 1991. In biomass terms, the increase was significantly less, only 12.5%, when compared with almost 60% more carcasses entering the market in 1996. A larger number of carcasses of the smaller-bodied species (i.e., rodents and the blue duiker [Cephalophus monticola] ) were recorded in 1996 than in 1991. Although an additional four species of birds and one squirrel were recorded in 1996, these were less important in terms of their contribution to biomass or carcass numbers. Concurrently, there was a dramatic reduction in the larger-bodied species, Ogilby's duiker (C. ogilbyi) and seven diurnal primates. We examined these changes, especially the drop in the number of larger animals. We considered the possible following explanations: (1) the number of hunters dropped either because of enforced legislation or scarcity of larger prey; (2) a shift in the use of hunting techniques occurred ( from shotguns to snares); or (3) consumer demand for primate and duiker meat dropped, which increased demand for smaller game. Our results suggest that the situation in Bioko may be alarmingly close to a catastrophe in which primate populations of international conservation significance are being hunted to dangerously low numbers. Although there is still a need for surveys of actual densities of prey populations throughout the island, working with the human population on Bioko to find alternatives to bushmeat is an urgent priority. Resumen: Realizamos conteos de los cuerpos de animales llevados al mercado de Malabo, en la Isla Bioko, Guinea Ecuatorial, durante dos periodos de estudio de ocho meses cada uno en 1991 y 1996. Las comparaciones realizadas de la disponibilidad y abundancia de especies individuales entre estos años mostró que más especies y más cuerpos aparecieron en 1996 que en 1991. En términos de biomasa, el incremento fue significativamente menor, solo 12.5% cuando se comparó con un incremento de casi un 60% más de cuerpos que llegaron al mercado en 1996. Se observó un mayor número de cuerpos de especies de tamaño pequeño ( por ejemplo roedores, y el duiker azul, Cephalophus monticola) en 1996 que en 1991. A pesar de que hubo una adición de cuatro especies de aves y una especie de ardilla en 1996, estas fueron menos importantes en cuanto a su contribución a la biomasa o el número de cuerpos. Al mismo tiempo, hubo una reducción dramática de especies de cuerpo grande, el duiker de Ogilby (C. ogilbyi) y siete primates diurnos. Examinamos estos cambios, especialmente la caída en el número de animales grandes y consideramos las siguientes posibles explicaciones: (1) hubo una caída significativa en el número de cazadores debido a la posible ejecución de la legislación o debido a una escasez de presas grandes; (2) hubo un cambio en el uso de técnicas de caza ( por ejemplo, el reemplazo de armas de fuego por trampas); o (3) la demanda del consumidor por carne de primates y duikers disminuyó, incrementándose la demanda por animales pequeños. Nuestros resultados sugieren que la situación en Bioko puede estar alarmantemente cerca de una catástrofe en la cual las poblaciones de primates, que son de gran significado para la conservación internacional, han sido reducidas a niveles peligrosamente bajos. A pesar de que aún se necesita llevar a cabo estudios de las densidades existentes de poblaciones de presas a lo largo de la isla, es urgente trabajar con la población humana de Bioko para encontrar alternativas a la venta de carne silvestre. [source] Taxable Income as a Performance Measure: The Effects of Tax Planning and Earnings Quality,CONTEMPORARY ACCOUNTING RESEARCH, Issue 1 2009Benjamin C. Ayers First page of article [source] System Complexity As a Measure of Safe Capacity for the Emergency DepartmentACADEMIC EMERGENCY MEDICINE, Issue 11 2006Daniel J. France PhD Objectives System complexity is introduced as a new measure of system state for the emergency department (ED). In its original form, the measure quantifies the uncertainty of demands on system resources. For application in the ED, the measure is being modified to quantify both workload and uncertainty to produce a single integrated measure of system state. Methods Complexity is quantified using an information-theoretic or entropic approach developed in manufacturing and operations research. In its original form, complexity is calculated on the basis of four system parameters: 1) the number of resources (clinicians and processing entities such as radiology and laboratory systems), 2) the number of possible work states for each resource, 3) the probability that a resource is in a particular work state, and 4) the probability of queue changes (i.e., where a queue is defined by the number of patients or patient orders being managed by a resource) during a specified time period. Results An example is presented to demonstrate how complexity is calculated and interpreted for a simple system composed of three resources (i.e., emergency physicians) managing varying patient loads. The example shows that variation in physician work states and patient queues produces different scores of complexity for each physician. It also illustrates how complexity and workload differ. Conclusions System complexity is a viable and technically feasible measurement for monitoring and managing surge capacity in the ED. [source] | ||||||||||||||||||||||||||||||||||||||||||||||||||||