Data Dependent Cells Chi‐Square Test With Recurrent Events

We consider a recurrent event wherein the inter‐event times are independent and identically distributed with a common absolutely continuous distribution function F. In this article, interest is in the problem of testing the null hypothesis that F belongs to some parametric family where the q‐dimensional parameter is unknown. We propose a general Chi‐squared test in which cell boundaries are data dependent. An estimator of the parameter obtained by minimizing a quadratic form resulting from a properly scaled vector of differences between Observed and Expected frequencies is used to construct the test. This estimator is known as the minimum chi‐square estimator. Large sample properties of the proposed test statistic are established using empirical processes tools. A simulation study is conducted to assess the performance of the test under parameter misspecification, and our procedures are applied to a fleet of Boeing 720 jet planes' air conditioning system failures.     

Drittmittel als Performanzindikator der Wissenschaftlichen Forschung

Resources within and between higher education and research institutions are increasingly allocated according to scientific performance. Evaluation exercises and the measurement of research performance take on a new role in this context. Third party research income is a performance indicator which is rather easy to measure and is used in most of the new performance-based evaluation procedures. This paper sets out to scrutinize the meaning and validity of third party research income. We studied research teams from three different research fields with a mixed quantitative / qualitative approach. The focus is on the causal relations between institutional / input indicators, third party research income as another input indicator, and a variety of output indicators of scientific production. An important result is that third party money has a positive effect on performance only below a certain and discipline-specific threshold. Further analysis shows that output performance is to a great extent field-specific. The context conditions for scientific production differ greatly, so that comparative performance assessments are only valid within homogeneous research fields. Another important result is that output performance is multidimensional and cannot be measured by bibliometric indicators only. These findings have implications for the rationality of the evaluation assessment exercises as well as for the funding decisions of science foundations, ministries of science and — increasingly, the heads of universities and departments. These topics are discussed in the last chapter as well as the implications for further research.     

Standardisierungspotentiale lebenszyklusbasierter Modelle des strategischen Kostenmanagements

Tremendous increases in indirect costs can be found in many industries. Consequently, life cycle cost analysis models are getting more important in strategic cost management. However, existing models differ significantly from each other as they have been developed mainly for specific applications. In order to enable a common use of those models, a standardization of these models is required. We examine the potentials of standardizing models for life cycle cost analysis. In a first step, requirements regarding a standard model are derived from literature. As a second step, existing approaches found in literature are compared to the afore derived demands and it is analyzed to what extent they match the standardization requirements. Based on this comparison, we identify and discuss avenues for further research.     

Bridging identity divides in current rural social mobilisation

The shift from a corporatist citizenship regime to a neoliberal one has adversely affected Latin American rural communities and led to widespread social mobilisation and organisation in the countryside. The struggle of such marginalised communities has been often framed by stressing their indigenous collective identity over the previously prevalent class-based peasant identity. This article focuses on the role of identity and the negotiation of different identities in the struggle of two rural organisations in Northwest Argentina for securing land tenure and improving their standards of living. Argentinean society, in contrast to some other Latin American societies, is often imagined as ‘white,’ but in recent decades many peasant, or campesino, communities have rediscovered or reaffirmed their indigenous origin. This article therefore deconstructs rural collective identities in Argentina and analyses how class and ethnic identities are negotiated in struggles of grassroots social organisations in the countryside of this predominantly urban country.     

Antecedents and effects of individual ambidexterity – A cross-level investigation of exploration and exploitation activities at the employee level

For long-term success, companies need to adapt to technological and environmental change. Organizational ambidexterity, which balances the exploration of new opportunities with the exploitation of existing capabilities, is increasingly viewed as a promising approach to tackle this challenge. However, despite the important role of individuals for firms' ambidexterity and performance, evidence on how exploration of new opportunities and exploitation of existing capabilities are triggered at an individual level and on their subsequent effects on overall performance is still lacking. Accordingly, the present research shifts the focus from organizational ambidexterity to individual ambidexterity. Based on data from 415 employees, the results of structural equation modeling show that both organizational architecture and organizational context can be used to induce individual ambidexterity. Furthermore, positive performance effects of individual ambidexterity across different organizational levels, namely the team and department levels, are confirmed.     

Homeland Interests,Hostland Politics: Politicized Ethnic Identity among Middle Eastern Heritage Groups in the United States1

Why do ethnic diasporas in the United States differ in their readiness for political mobilization on behalf of homeland interests? This study develops a tiered model of politicized ethnic identity emphasizing both individual‐level traits and group/collective properties. Using Zogby “Culture Polls,” the theory is tested on three Middle Eastern heritage groups in the United States (Jews, Arab Christians, Arab Muslims). Empirical analysis confirms that individuals differ in their readiness for mobilization around Middle East issues based on the strength of ties to the ethnic community and, net of such differences, each group varies based on the contexts of exit and reception it faced at the time of immigration. The findings suggest that studies of diaspora influence on American foreign policy need to take account of the mass base rather than focus exclusively on elite behavior.     

Evaluating the effectiveness of student assistance programs in Pennsylvania

This article presents data from an evaluation of the Pennsylvania Student Assistance Program (SAP). Focusing on both program process and effectiveness, the evaluation was conducted to determine the overall efficacy of SAPs in Pennsylvania and, more specifically, how SAP is currently being implemented. Five data collection strategies were employed: statewide surveys of SAP team members and county administrators, focus groups, site visits, and the Pennsylvania Department of Education SAP Database. A total of 1204 individual team members from 154 school buildings completed the team member survey. Fifty-three county administrators completed the county administrator survey. Focus groups were comprised of SAP coordinators, school board personnel and community agency staff. Site visits were conducted at five schools. The findings of the evaluation indicate that SAP in Pennsylvania is being implemented as designed. Recommended is the development of benchmarks and indicators that focus on the best SAP practices and the extent to which various indicators of the effectiveness of SAP are occurring at appropriate levels.