935 resultados para empirical testing
Resumo:
Much of the International Relations literature assumes that there is a “depth versus participation” dilemma in international politics: shallower international agreements attract more countries and greater depth is associated with less participation. We argue that this conjecture is too simple and probably misleading because the depth of any given cooperative effort is in fact multidimensional. This multidimensionality manifests itself in the design characteristics of international agreements: in particular, the specificity of obligations, monitoring and enforcement mechanisms, dispute settlement mechanisms, positive incentives (assistance), and organizational structures (secretariats). We theorize that the first three of these design characteristics have negative and the latter three have positive effects on participation in international cooperative efforts. Our empirical testing of these claims relies on a dataset that covers more than 200 global environmental treaties. We find a participation-limiting effect for the specificity of obligations, but not for monitoring and enforcement. In contrast, we observe that assistance provisions in treaties have a significant and substantial positive effect on participation. Similarly, dispute settlement mechanisms tend to promote treaty participation. The main implication of our study is that countries do not appear to stay away from agreements with monitoring and enforcement provisions, but that the inclusion of positive incentives and dispute settlement mechanisms can promote international cooperation. In other words, our findings suggest that policymakers do not necessarily need to water down global treaties in order to obtain more participation.
Resumo:
Background. Accurate measurement of attitudes toward participation in cancer treatment trials (CTs) and cancer prevention trials (CPTs) across varied groups could assist health researchers and educators when addressing attitudinal barriers to participation in these trials. ^ Methods. The Attitudes toward Cancer Trials Scales (ACTS) instrument development was based on a conceptual model developed from research literature, clinical practice experience, and empirical testing of items with a sample of 312 respondents. The ACTS contains two scales, the Cancer Trials (CT) scale (4 components; 18 items) and the Cancer Prevention Trials (CPT) scale (3 components; 16 items). Cronbach's alpha values for the CT and CPT scales, respectively, were 0.86 and 0.89. These two scales along with sociodemographic and cancer trial history variables were distributed in a mail survey of former patients of a large cancer research center. The disproportionate stratified probability sampling procedure yielded 925 usable responses (54% response rate). ^ Results. Prevalence of favorable attitudes toward CTs and CPTs was 66% and 69%, respectively. There were no significant differences in mean scale scores by cancer site or gender, but African Americans had more favorable attitudes toward CTs than European Americans. Multiple regression analysis indicated that older age, lower education level, and prior CT participation history were associated with more favorable attitudes toward CTs. Prior CT participation and prior CPT participation were associated with more favorable attitudes toward CPTs. Results also provided evidence of reliability and construct validity for both scales. ^ Conclusions. Middle age, higher education, and European American ethnicity are associated with less positive attitudes about participating in cancer treatment trials. Availability of a psychometrically sound instrument to measure attitudes may facilitate a better understanding decision making regarding participation in CTs and CPTs. It is this author's intention that the ACTS' scales will be used by other investigators to measure attitudes toward CTs and CPTs in various groups of persons, and that the many issues regarding participation in trials might become more explicit. ^
Resumo:
Aim: The landscape metaphor allows viewing corrective experiences (CE) as pathway to a state with relatively lower 'tension' (local minimum). However, such local minima are not easily accessible but obstructed by states with relatively high tension (local maxima) according to the landscape metaphor (Caspar & Berger, 2012). For example, an individual with spider phobia has to transiently tolerate high levels of tension during an exposure therapy to access the local minimum of habituation. To allow for more specific therapeutic guidelines and empirically testable hypotheses, we advance the landscape metaphor to a scientific model which bases on motivational processes. Specifically, we conceptualize CEs as available but unusual trajectories (=pathways) through a motivational space. The dimensions of the motivational state are set up by basic motives such as need for agency or attachment. Methods: Dynamic system theory is used to model motivational states and trajectories using mathematical equations. Fortunately, these equations have easy-to-comprehend and intuitive visual representations similar to the landscape metaphor. Thus, trajectories that represent CEs are informative and action guiding for both therapists and patients without knowledge on dynamic systems. However, the mathematical underpinnings of the model allow researchers to deduct hypotheses for empirical testing. Results: First, the results of simulations of CEs during exposure therapy in anxiety disorders are presented and compared to empirical findings. Second, hypothetical CEs in an autonomy-attachment conflict are reported from a simulation study. Discussion: Preliminary clinical implications for the evocation of CEs are drawn after a critical discussion of the proposed model.
Resumo:
Although the influences of socioeconomic, behavioral and biological factors on birth weight have been extensively studied, most studies have been limited to clinical populations. This study examines such relationships in a national probability sample, the National Health and Nutrition Examination Survey of 1971-1974. The study sample consisted of 2161 white children and 812 black children, aged 1 to 5 years. Analyses were performed on a subsample consisting of 753 white and 138 black children whose mothers were also selected into the survey. Detailed analyses examined interrelationships among socio-economic, behavioral and biological factors by means of multiple regression and partial correlation procedures in the white population. These analyses were not carried out among blacks because of an observed clustering bias introduced in the black subsample that hampered generalization to the US population.^ The results among the whites indicated that the biological factors of maternal height, maternal weight, maternal size (weight/height('2)), maternal age and sex of child were independently related to birth weight and were also interrelated with socioeconomic factors such as family income, education of the mother and education of the head of the household. The joint effect was significantly associated with birth weight.^ Mothers' dietary practices represented the behavioral factors. Selected nutrients from the mothers' 24-hour dietary recall were used to develop indices of dietary quality. Dietary quality was significantly interrelated with socioeconomic status, biological factors and birth weight.^ The findings of this study suggest that smaller, younger mothers of lower socioeconomic status and female children were significantly associated with lower birth weight. The findings also suggest that dietary quality is a mediating factor among socioeconomic status and biological factors in that mothers with more financial and educational resources have better dietary practices. Such mothers may also practice other health behaviors that would prevent having a low birthweight baby. This dissertation contributes primarily to the further conceptualization and empirical testing of the interrelationships among socioeconomic, behavioral and biological factors with respect to birth weight. ^
Resumo:
Reciprocidade indivíduo-organização e afetividade são dois fenômenos presentes na vida organizacional e que se tornaram tópicos de pesquisa no campo de estudos do comportamento organizacional. Esse estudo teve como objetivo reforçar as evidências empíricas acerca das relações entre cognições de troca indivíduo-organização e afetividade no contexto de trabalho. Para tanto, foram submetidas à teste empírico cinco hipóteses inspiradas em um estudo inédito desenvolvido por Siqueira (2002b). Contou-se com a utilização de um questionário composto por cinco escalas validadas, referentes as variáveis do estudo, que avaliaram percepção de suporte organizacional (PSO), percepção de reciprocidade organizacional (PRO), comprometimento organizacional normativo (CON), satisfação no trabalho (STR) e comprometimento organizacional afetivo (COA). Participaram 275 profissionais, sendo 183 pertencentes ao setor administrativo e 92 ao setor administrativo-acadêmico de uma Instituição de Ensino Superior, situada na região do Grande ABCD Paulista e com inserção no estado de São Paulo. OS participantes do estudo tinham idade média de 32 anos, sendo a maioria (58,2%) do sexo feminino, com escolaridade em nível superior (39,6%) e tempo médio de trabalho na organização de quatro anos. Os dados coletados foram organizados em um banco de dados eletrônico para tratamento estatístico, quando se utilizou o aplicativo SPSS (Statistical Package for the Social Scienses). Foram realizadas análises descritivas das variáveis e análises de correlação e de regressão múltipla para os testes das cinco hipóteses. Todas as hipóteses foram confirmadas. Conclui-se então, que o presente estudo reforça as proposições de Siqueira (2002b) acerca da pertinência de se considerar os três conceitos analisados (PSO, PRO E CON) como integrantes do esquema mental de reciprocidade. Ainda, os resultados do estudo reafirmam as evidências acerca da capacidade preditiva do EMR sobre satisfação no trabalho e comprometimento organizacional afetivo. Por fim, a análise dos dados aponta percepção de suporte organizacional como sendo o componente cognitivo do EMR com maior poder de influência sobre satisfação no trabalho e comprometimento organizacional afetivo. Portanto, cognições acerca das relações de troca social com organizações antecedem satisfação e comprometimento afetivo que, por sua vez, são importantes fatores a favor da organização, contribuindo para sua efetividade.
Resumo:
Reciprocidade indivíduo-organização e afetividade são dois fenômenos presentes na vida organizacional e que se tornaram tópicos de pesquisa no campo de estudos do comportamento organizacional. Esse estudo teve como objetivo reforçar as evidências empíricas acerca das relações entre cognições de troca indivíduo-organização e afetividade no contexto de trabalho. Para tanto, foram submetidas à teste empírico cinco hipóteses inspiradas em um estudo inédito desenvolvido por Siqueira (2002b). Contou-se com a utilização de um questionário composto por cinco escalas validadas, referentes as variáveis do estudo, que avaliaram percepção de suporte organizacional (PSO), percepção de reciprocidade organizacional (PRO), comprometimento organizacional normativo (CON), satisfação no trabalho (STR) e comprometimento organizacional afetivo (COA). Participaram 275 profissionais, sendo 183 pertencentes ao setor administrativo e 92 ao setor administrativo-acadêmico de uma Instituição de Ensino Superior, situada na região do Grande ABCD Paulista e com inserção no estado de São Paulo. OS participantes do estudo tinham idade média de 32 anos, sendo a maioria (58,2%) do sexo feminino, com escolaridade em nível superior (39,6%) e tempo médio de trabalho na organização de quatro anos. Os dados coletados foram organizados em um banco de dados eletrônico para tratamento estatístico, quando se utilizou o aplicativo SPSS (Statistical Package for the Social Scienses). Foram realizadas análises descritivas das variáveis e análises de correlação e de regressão múltipla para os testes das cinco hipóteses. Todas as hipóteses foram confirmadas. Conclui-se então, que o presente estudo reforça as proposições de Siqueira (2002b) acerca da pertinência de se considerar os três conceitos analisados (PSO, PRO E CON) como integrantes do esquema mental de reciprocidade. Ainda, os resultados do estudo reafirmam as evidências acerca da capacidade preditiva do EMR sobre satisfação no trabalho e comprometimento organizacional afetivo. Por fim, a análise dos dados aponta percepção de suporte organizacional como sendo o componente cognitivo do EMR com maior poder de influência sobre satisfação no trabalho e comprometimento organizacional afetivo. Portanto, cognições acerca das relações de troca social com organizações antecedem satisfação e comprometimento afetivo que, por sua vez, são importantes fatores a favor da organização, contribuindo para sua efetividade.
Resumo:
In the last few years, transaction cost economics has become a popular theory within the construction research community. This approach has been singularly applied as a means to explain and predict phenomena concerning the construction firm, including its vertical boundaries. However, this is at a time when the chief proponents of transaction costs are urging researchers to take a pluralistic stance in relation to the theory of the firm. The aim of this paper is to develop a pluralistic approach to the vertical boundaries of the construction firm. In order to achieve this, an integrative framework is described, based on the development of the efficient boundaries problem and the capabilities approach to vertical integration. Specifically, this framework draws on the complementary strengths of transaction cost economics and the resource-based view. It is concluded that the potential relative merits of theoretical pluralism, in terms of the vertical boundaries of the construction firm, are sufficient grounds to motivate empirical testing of the predictions associated with the integrative framework of vertical integration presented
Resumo:
Would the outcome of a Global multinational organization’s decision be the same if the same decision were to be made in different countries throughout the world? Within the same organization, we propose that national cultural differences can influence decision making in different countries and cultural clusters. While much work has been done on organizational cultural influences, this study examines the influence that national culture has on organizational decision making in respect to the evolution/redevelopment decision that organizations face when a system is believed to be entering the obsolescence phase. Building on findings from the Globe research program, we show by empirical testing of a theoretical model that national cultural dimensions are significantly associated with a) the outcome of the decision to enhance or re-develop a system, and b) the organizational level at which such decisions are made. This research is significant as a means to improve management decision making, particularly with regard to the enhancement versus re-development decision. The research suggests that a relatively uniform sub-culture exists across the global IS project level but that national cultural dimensions play a more important role in determining the organizational management level at which decisions are made.
Resumo:
Reciprocidade indivíduo-organização e afetividade são dois fenômenos presentes na vida organizacional e que se tornaram tópicos de pesquisa no campo de estudos do comportamento organizacional. Esse estudo teve como objetivo reforçar as evidências empíricas acerca das relações entre cognições de troca indivíduo-organização e afetividade no contexto de trabalho. Para tanto, foram submetidas à teste empírico cinco hipóteses inspiradas em um estudo inédito desenvolvido por Siqueira (2002b). Contou-se com a utilização de um questionário composto por cinco escalas validadas, referentes as variáveis do estudo, que avaliaram percepção de suporte organizacional (PSO), percepção de reciprocidade organizacional (PRO), comprometimento organizacional normativo (CON), satisfação no trabalho (STR) e comprometimento organizacional afetivo (COA). Participaram 275 profissionais, sendo 183 pertencentes ao setor administrativo e 92 ao setor administrativo-acadêmico de uma Instituição de Ensino Superior, situada na região do Grande ABCD Paulista e com inserção no estado de São Paulo. OS participantes do estudo tinham idade média de 32 anos, sendo a maioria (58,2%) do sexo feminino, com escolaridade em nível superior (39,6%) e tempo médio de trabalho na organização de quatro anos. Os dados coletados foram organizados em um banco de dados eletrônico para tratamento estatístico, quando se utilizou o aplicativo SPSS (Statistical Package for the Social Scienses). Foram realizadas análises descritivas das variáveis e análises de correlação e de regressão múltipla para os testes das cinco hipóteses. Todas as hipóteses foram confirmadas. Conclui-se então, que o presente estudo reforça as proposições de Siqueira (2002b) acerca da pertinência de se considerar os três conceitos analisados (PSO, PRO E CON) como integrantes do esquema mental de reciprocidade. Ainda, os resultados do estudo reafirmam as evidências acerca da capacidade preditiva do EMR sobre satisfação no trabalho e comprometimento organizacional afetivo. Por fim, a análise dos dados aponta percepção de suporte organizacional como sendo o componente cognitivo do EMR com maior poder de influência sobre satisfação no trabalho e comprometimento organizacional afetivo. Portanto, cognições acerca das relações de troca social com organizações antecedem satisfação e comprometimento afetivo que, por sua vez, são importantes fatores a favor da organização, contribuindo para sua efetividade.
Resumo:
This paper contributes to the literature on the intra-firm diffusion of innovations by investigating the factors that affect the firm’s decision to adopt and use sets of complementary innovations. We define complementary innovations those innovations whose joint use generates super additive gains, i.e. the gain from the joint adoption is higher than the sum of the gains derived from the adoption of each innovation in isolation. From a theoretical perspective, we present a simple decision model, whereby the firm decides ‘whether’ and ‘how much’ to invest in each of the innovations under investigation based upon the expected profit gain from each possible combination of adoption and use. The model shows how the extent of complementarity among the innovations can affect the firm’s profit gains and therefore the likelihood that the firm will adopt these innovations jointly, rather than individually. From an empirical perspective, we focus on four sets of management practices, namely operating (OMP), monitoring (MMP), targets (TMP) and incentives (IMP) management practices. We show that these sets of practices, although to a different extent, are complementary to each other. Then, we construct a synthetic indicator of the depth of their use. The resulting intra-firm index is built to reflect not only the number of practices adopted but also the depth of their individual use and the extent of their complementarity. The empirical testing of the decision model is carried out using the evidence from the adoption behaviour of a sample of 1,238 UK establishments present in the 2004 Workplace Employment Relations Survey (WERS). Our empirical results show that the intra-firm profitability based model is a good model in that it can explain more of the variability of joint adoption than models based upon the variability of adoption and use of individual practices. We also investigate whether a number of firm specific and market characteristics by affecting the size of the gains (which the joint adoption of innovations can generate) may drive the intensity of use of the four innovations. We find that establishment size, whether foreign owned, whether exposed to an international market and the degree of homogeneity of the final product are important determinants of the intensity of the joint adoption of the four innovations. Most importantly, our results point out that the factors that the economics of innovation literature has been showing to affect the intensity of use of a technological innovation do also affect the intensity of use of sets of innovative management practices. However, they can explain only a small part of the diversity of their joint adoption use by the firms in the sample.
Resumo:
New Technology Based Firms (NTBF) are considered to be important for the economic development of a country in regards to both employment growth and innovative activity. The latter is believed to contribute significantly to the increase in productivity and therefore the competitiveness of UK’s economy. This study contributes to the above literature by investigating two of the factors believed to limit the growth of such firms in the UK. The first concerns the existence of a ‘knowledge gap’ while the second the existence of a ‘financial gap’. These themes are developed along three main research lines. Firstly, based upon the human capital theory initially proposed by Backer (1964) new evidence is provided on the human capital characteristics (experience and education) of the current UK NTBF entrepreneurs. Secondly, the causal relationship between general and specific human capital (as well as their interactions) upon the company performance and growth is investigated via its traditional direct effect as well as via its indirect effect upon the access to external finance. Finally, more light is shed on the financial structure and the type of financial constraints that high-tech firms face at start-up. In particular, whether a financial gap exists is explored by distinguishing between the demand and the supply of external finance as well as by type of external source of financing. The empirical testing of the various research hypotheses has been obtained by carrying out an original survey of new technology based firms defined as independent companies, established in the past 25 years in R&D intensive sectors. The resulting dataset contains information for 412 companies on a number of general company characteristics and the characteristics of their entrepreneurs in 2004. Policy and practical implications for future and current entrepreneurs and also providers of external finance are provided.
Resumo:
Researchers often develop and test conceptual models containing formative variables. In many cases, these formative variables are specified as being endogenous. This article provides a clarification of formative variable theory, distinguishing between the formative latent variable and the formative composite variable. When an endogenous latent variable relies on formative indicators for measurement, empirical studies can say nothing about the relationship between exogenous variables and the endogenous formative latent variable: conclusions can only be drawn regarding the exogenous variables' relationships with a composite variable. The authors also show the dangers associated with developing theory about antecedents to endogenous formative variables at the (aggregate) formative latent variable level. Modeling relationships with endogenous formative variables at the (disaggregate) indicator level informs richer theory development, and encourages more precise empirical testing. When antecedents' relationships with endogenous formative variables are modeled at the formative latent variable level rather than the formative indicator level, theory construction can verge on the superficial, and empirical findings can be ambiguous in substantive meaning.
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There is a paucity of literature regarding the construction and operation of corporate identity at the stakeholder group level. This article examines corporate identity from the perspective of an individual stakeholder group, namely, front-line employees. A stakeholder group that is central to the development of an organization’s corporate identity as it spans an organization’s boundaries, frequently interacts with both internal and external stakeholders, and influences a firm’s financial performance by building customer loyalty and satisfaction. The article reviews the corporate identity, branding, services and social identity literatures to address how corporate identity manifests within the front-line employee stakeholder group, identifying what components comprise front-line employee corporate identity and assessing what contribution front-line employees make to constructing a strong and enduring corporate identity for an organization. In reviewing the literature the article develops propositions that, in conjunction with a conceptual model, constitute the generation of theory that is recommended for empirical testing.
Resumo:
Today, many organizations are turning to new approaches to building and maintaining information systems (I/S) to cope with a highly competitive business environment. Current anecdotal evidence indicates that the approaches being used improve the effectiveness of software development by encouraging active user participation throughout the development process. Unfortunately, very little is known about how the use of such approaches enhances the ability of team members to develop I/S that are responsive to changing business conditions.^ Drawing from predominant theories of organizational conflict, this study develops and tests a model of conflict among members of a development team. The model proposes that development approaches provide the relevant context conditioning the management and resolution of conflict in software development which, in turn, are crucial for the success of the development process.^ Empirical testing of the model was conducted using data collected through a combination of interviews with I/S executives and surveys of team members and business users at nine organizations. Results of path analysis provide support for the model's main prediction that integrative conflict management and distributive conflict management can contribute to I/S success by influencing differently the manifestation and resolution of conflict in software development. Further, analyses of variance indicate that object-oriented development, when compared to rapid and structured development, appears to produce the lowest levels of conflict management, conflict resolution, and I/S success.^ The proposed model and findings suggest academic implications for understanding the effects of different conflict management behaviors on software development outcomes, and practical implications for better managing the software development process, especially in user-oriented development environments. ^
Resumo:
The theoretical construct of control has been defined as necessary (Etzioni, 1965), ubiquitous (Vickers, 1967), and on-going (E. Langer, 1983). Empirical measures, however, have not adequately given meaning to this potent construct, especially within complex organizations such as schools. Four stages of theory-development and empirical testing of school building managerial control using principals and teachers working within the nation's fourth largest district are presented in this dissertation as follows: (1) a review and synthesis of social science theories of control across the literatures of organizational theory, political science, sociology, psychology, and philosophy; (2) a systematic analysis of school managerial activities performed at the building level within the context of curricular and instructional tasks; (3) the development of a survey questionnaire to measure school building managerial control; and (4) initial tests of construct validity including inter-item reliability statistics, principal components analyses, and multivariate tests of significance. The social science synthesis provided support of four managerial control processes: standards, information, assessment, and incentives. The systematic analysis of school managerial activities led to further categorization between structural frequency of behaviors and discretionary qualities of behaviors across each of the control processes and the curricular and instructional tasks. Teacher survey responses (N=486) reported a significant difference between these two dimensions of control, structural frequency and discretionary qualities, for standards, information, and assessments, but not for incentives. The descriptive model of school managerial control suggests that (1) teachers perceive structural and discretionary managerial behaviors under information and incentives more clearly than activities representing standards or assessments, (2) standards are primarily structural while assessments are primarily qualitative, (3) teacher satisfaction is most closely related to the equitable distribution of incentives, (4) each of the structural managerial behaviors has a qualitative effect on teachers, and that (5) certain qualities of managerial behaviors are perceived by teachers as distinctly discretionary, apart from school structure. The variables of teacher tenure and school effectiveness reported significant effects on school managerial control processes, while instructional levels (elementary, junior, and senior) and individual school differences were not found to be significant for the construct of school managerial control.