A stochastic inventory routing problem (SIRP) is typically the combination of stochastic inventory control problems and NP-hard vehicle routing problems, for a depot to determine delivery volumes to its customers in each period, and vehicle routes to distribute the delivery volumes. This paper...

Putting measures in place to prevent wrongdoing in organizations is important, but detecting and correcting wrongdoing is just as vital. Employees who observe wrongdoing should therefore be encouraged to respond in a manner that supports corrective action. This paper examines the influence of...

This paper examines the robustness of the results found by Douglas and Popova (2008). They examine the electricity forward premium in relation to gas storage inventories and find that, although electricity is not directly storable, electricity forward premiums are lower when gas storage...

Personal strategies of owners/founders of small business startups are related to performance and to environmental uncertainty. This is done using a longitudinal data set of some 50 Dutch startups. The results suggest a dynamic process between strategy and performance.A discrimination is made...

Geometric optimisation algorithms are developed that efficiently find the nearest low-rank correlation matrix. We show, in numerical tests, that our methods compare favourably to the existing methods in the literature. The connection with the Lagrange multiplier method is established, along with...

This study examines the contribution of a personality variable in motivation losses in group performance. Differences in the endorsement of the Protestant Work Ethic can account for variance in motivation losses in group work. Male student scores on the Mirels- Garrett Protestant Work Ethic...

Leadership often serves as an explanatory category for performance outcomes (i.e., failure and success). This process can strengthen or weaken leadership effectiveness, because contingent on their performance leaders may gain or lose follower endorsement - the basis of leadership. Drawing on the...

In this paper we derive the worst-case ratio of an online algorithm for the Traveling Salesman Problem (TSP) with two disclosure dates. This problem, a variant of the online TSP with release dates, is characterized by the disclosure of a job's location at one point in time followed by the...

The modifiable areal unit problem (MAUP) refers to the sensitivity of statistical research results to the initial spatial nomenclature used. Despite a substantial literature in the related field of geography on the potential influence of the MAUP, the urban economic modeling tradition has not...

In this paper we describe how rolling stock and passenger connections in a cyclic railway timetable can be modeled in a flexible way within the model for the Periodic Event Scheduling Problem (PESP). The PESP model was introduced by Serani and Ukovich (1989). Usually, PESP-models assume that the...