In the study of examination results much interest centres on comparisons of curriculum subjects entered and the correlation between these at individual and institution level based on data where not every individual takes all subjects. Such `missing' data are not missing at random because individuals deliberately select subjects that they wish to study according to criteria that will be associat...

The recent literature on the duration of trade has predominantly analyzed the determinants of trade flow durations using Cox proportional hazards models. The purpose of this paper is to show why it is inappropriate to analyze the duration of trade with continuous-time models such as the Cox model, and to propose alternative discrete-time models which are more suitable for estimation. Briefly, t...

Previous research has shown that the adoption of quality management system and the implementation of knowledge management have effects on organizational performance. Yet, little attention has been paid to moderating conditions on the relationship among these variables. The main purpose of this research is to empirically examine the moderating role of adopting quality management system in the ef...

Der Bedarf an überbetrieblicher Kooperation bei Unternehmen wächst zunehmend. Technologische und marktbedingte Entwicklungen drängen zur Kooperation mit Partnern, wobei sich die Integrationsreife vieler Organisationen immer noch auf einem niedrigen Niveau befindet. Nutzenpotenziale von überbetrieblicher Integration werden kaum von den beteiligten Partnern innerhalb eines Integrationsszenarios g...

We analyze the effects of redistricting as revealed in the votes received by the Democratic and Republican candidates for state legislature. We develop measures of partisan bias and the responsiveness of the composition of the legislature to changes in statewide votes. Our statistical model incorporates a mixed hierarchical Bayesian and non-Bayesian estimation, requiring simulation along the li...

‎Abstract: In this paper, a new mixture modelling using the normal mean-variance mixture of Lindley (NMVL) distribution has been considered. The proposed model is heavy-tailed and multimodal and can be used in dealing with asymmetric data in various theoretic and applied problems. We present a feasible computationally analytical EM algorithm for computing the maximum likelihood estimates. T...

Waterbodies around the world experience problems associated with elevated phosphorus (P) and nitrogen (N) loads. While vital for ecosystem functioning, when present in excess amounts these nutrients can impair water quality create symptoms of eutrophication, including harmful algal blooms. Under a changing climate, nutrient loads are likely to change. climate models serve as inputs watershed mo...

climatological parameters are among the most important ecological capability evaluation criterias, on other hand, climate changes which has intensified in the past decades and has the consequences such as; increases in climatic threshold phenomena like occurrence of horrific floodings, destructive hurricanes, abnormal and sudden colds and heats, untimely rainfalls and heavy snows, widespread dr...