A minimum expected response model: Formulation, heuristic solution, and application

Responding to true emergencies in the shortest possible time saves lives, prevents permanent injuries and reduces suffering. Most covering models consider an emergency cover if an ambulance is available within a given time or distance threshold. From a modeling perspective, shorter or longer responses within this threshold are all tallied as covered; conversely, the emergencies immediately outside the threshold are considered uncovered. However, if the shorter responses are given more weight along with the volume of such incidents, while still meeting system-wide coverage requirements, both customers and providers can benefit from reduced response times. We formulate a model to determine the locations for a given set of ambulances to minimize the system-wide expected response distances while meeting coverage requirements. We solve the model with a heuristic search algorithm and present computational and comparative statistics using data from an existing Emergency Medical Services agency.     

Using job embeddedness factors to explain voluntary turnover in four European countries

The aging of the European workforce coupled with existing deficits of skilled workers in vital sectors (e.g., information and communication technology) make the attraction and retention of skilled workers a critical strategic human resource management issue. The large-scale, multi-country study reported in this article investigates the causes of voluntary turnover. The study is based on a large European dataset that contains information about a wide variety of variables that have been shown to influence voluntary turnover. The results indicate that the traditional turnover model, where ease of movement and desirability of movement are regarded as important predictors of turnover, receives support. Importantly, the study also shows that a new theory of employee retention – job embeddedness – explains a significant amount of variance above and beyond the role of demographic and traditional variables. In sum, the evidence suggests that the turnover decision is not only about the individual's attitudes towards work or about the actual opportunities in the labour market, but also job embeddedness.     

Measuring and predicting heterogeneous recessions

This paper examines the usefulness of a more refined business cycle classification for monthly industrial production (IP), beyond the usual distinction between expansions and contractions. Univariate Markov-switching models show that a three regime model is more appropriate than a model with only two regimes. Interestingly, the third regime captures ‘severe recessions’, contrasting the conventional view that the additional third regime represents a ‘recovery’ phase. This is confirmed by means of Markov-switching vector autoregressive models that allow for phase shifts between the cyclical regimes of IP and the Conference Board's Leading Economic Index (LEI). The timing of the severe recession regime mostly corresponds with periods of substantial financial market distress and severe credit squeezes, providing empirical evidence for the ‘financial accelerator’ theory.     

Exports of primary goods and human capital accumulation

Many developing countries have experienced export‐led growth in the last half century. This paper asks whether the content of what economies export matters for human capital accumulation. We construct a small open economy model and find that expansion of primary exports can harm human capital accumulation if the economy is initially allocating significant resources to the production of primary goods. We then test this prediction empirically using Latin American data over the period 1965 to 2010 and find robust evidence in support of the hypothesis that a shift towards primary exports reduces human capital accumulation. Given the importance of the latter for long‐run growth, our results suggest a potential role for policy intervention.     

发现公司前雇员的价值

维持与公司前雇员的良好关系，不但可以获得有价值的情报，产生新业务，而且还可以通过他们聘请到优秀人才。     

The Government Spending Multiplier in Turkey

This study aims to measure the size of the government spending multiplier in Turkey for post-2001 financial crisis period within a structural VAR framework. The analysis demonstrates that a positive shock to government spending tends to increase output, tax, and real interest rate on impact and the size of the fiscal multiplier is relatively large at first few quarters. The fiscal multiplier reaches a peak value of 1.5 at second quarter and then starts to diminish. Furthermore, investigating the effects of the components of government spending reveals the fact that government investment expenditures, rather than consumption expenditures, have a profound impact on output at first few quarters.     

A meta-analysis of the determinants of organic sales growth

We present the results of a meta-analysis on drivers of organic sales growth conducted using a Hierarchical Bayes estimation technique. Based on a comprehensive review of a diverse set of literatures on organic sales growth, we identify eleven drivers of organic sales growth performance of firms: (i) innovation, (ii) marketing orientation (iii) advertising (iv) interorganizational networks, (v) entrepreneurial orientation, (vi) management capacity, (vii) firm age, (viii) firm size, (ix) competition, (x) munificence, and (xi) dynamism. Among the variables under a manager's control, innovation, advertising, market orientation, interorganizational networks, entrepreneurial orientation and managerial capacity serve as positive drivers of organic growth. Older firms and firms operating in dynamic and competitive environments face constraints in terms of organic growth. We find that the omission of marketing variables in empirical models biases the elasticities of eight of the drivers of organic growth. Three study design characteristics impact the magnitude of elasticity of organic growth drivers: using cross-sectional data instead of panel data, using growth rates instead of absolute change as operationalization of growth and using market share instead of sales as a measure of revenues.     

Moderating Effects of Vacation on Reactions to Work and Domestic Stress

Several factors have been found to reduce the adverse effects of stress on physical and mental health. In this study it was investigated whether vacation modified the effects of occupational and domestic stress on different aspects of well-being. Also, the moderating effect of recuperation was studied. Occupational stress, operationalized as perceived workload, domestic stress and well-being were measured by questionnaire ten days before and three days after a two-week vacation from work for a sample of n = 53 employees of a hardware company. Workload did not affect well-being before vacation, but had a deteriorating impact on the quality of sleep, social activities, and mood after vacation. Domestic stress had a similar impact on well-being before and after vacation. Subjects reporting greater recuperation during vacation had less physical complaints and greater life satisfaction when experiencing high workload than subjects reporting less recuperation. In conclusion, this study shows that vacation generally does not buffer the effects of occupational or domestic stress on well-being. Rather, the results suggest that high levels of postvacation work-load eliminate the potentially positive effect of vacation. However, the results also indicate that a restful vacation may buffer postvacation work-related stress with respect to physical complaints and life satisfaction, but not with respect to mood-related aspects of well-being and sleep.     

An investigation of the role of justice in turnover intentions,job satisfaction,and organizational citizenship behavior in hospitality industry

The relationship of organizational justice perceptions of hotel employees in North Cyprus with various work-related variables was investigated. A total of 208 employees and their managers filled out questionnaires. It was found that distributive justice tended to be a stronger predictor of all of the study variables compared to procedural justice. Findings suggest that the fairness of personal outcomes that employees receive may have more impact on turnover intentions, job satisfaction and organizational citizenship behavior (OCB) than the perceived fairness of a firm's procedures. It was also found that even though improved job satisfaction seems to be related to OCB, organizational justice seems to be the key factor that has a strong effect on both OCB and job satisfaction.     

Investigation on Visitors' Perceptions of Recreation Impacts in Sun Moon Lake National Scenic Area in Taiwan

This research attempts to understand the visitors' perceptions of the environmental impacts caused by six recreational activities by using Sun Moon Lake National Scenic Area in Taiwan. The six recreational activities were fishing, camping, trail use, swimming, biking and motorboating. It compared the visitors' perceptions of the recreation impacts before and after the environmental impact information was provided. The convenience sampling method was used during three weekends in August 2005. The results indicated that visitors in the study were aware of the environmental impacts caused by the six recreational activities. The most harmful activity among all was motorboating and the most harmless one was biking. In addition, different variables such as gender, age and preference influenced visitors' perceptions of the recreation impacts of different types of activity. Overall, after receiving the environmental information, the visitors' perceptions of all activities moved to being more harmful than their previous perceptions. This means the environmental impact information sheet given in the post-test did change the perception of recreational impacts. In general, visitors viewed their own activities as having fewer recreational impacts than non-participants, except for the boating activity.