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排序方式: 共有219条查询结果,搜索用时 15 毫秒
1.
José M. Luengo Sagrario Arias Mario Arcos Elías R. Olivera 《Spanish Economic Review》2005,7(4):307-307
Spanish Economic Review referees (2003-2004)
Spanish Economic Review referees (2003-2004) 相似文献2.
For over a century and a half, there have been cyclical phases ofsaturation and shortage in the numbers of students enrolled at German and Prussian universities. Starting from thisobservations, this article constructs a neoclassical glutting theory. A two-fold hypothesis is put forward. Firstly,the behaviour of students in their choice of curriculum depends on the expected rewards. Indeed, the allocation of studentsto the various faculties depends on the comparative yields of the latter in terms of expected earnings and job availabilityin the corresponding professional sectors. Thus, the rewards expected by a student are represented by the earnings on thelabour market at a given moment and that he or she considers to be sustainable in time. Secondly, an attraction phenomenonmay appear for certain curricula when a shortage occurs in different professional sectors. Once the shortagehas been made up, the demand effect continues as a result of delay in the perception of the situation by young people.This may gradually lead to comparative over-production of qualifieduniversity leavers. This unbalanced situation diverts new cohorts ofstudents to other sectors ofeducation and may cause a new shortage, finally resulting in acyclical movement modulated according to job availability. 相似文献
3.
El Sherbini AA 《Food Policy》1986,11(1):7-11
This analysis of rural poverty and hunger in Africa discusses the intertemporal and cross-sectional dimensions of poverty as an aid to policies and programs to alleviate hunger. Since nutritional adequacy of diets varies according to season, seasonality is an important cause of poverty especially in countries with 1 major harvest. In agricultural communities the wet season brings on food shortages and high prices, requiring assistance programs to concentrate on alleviating hunger at this time of year. Drought places a similar demand on resources. People may be poorer in 1 section of a country than another if they have no access to the existing power system, depriving them of services and assistance. There are forgotten regions of Africa where people are poor due to physical isolation, increasing the risk of drought and impeding emergency relief. Production in these areas may be low because there are no consumer goods to buy with surplus. It is important to identify target groups for financial assistance which will change with time and environmental conditions. 相似文献
4.
Lean Implementation in Small and Medium‐Sized Enterprises in Less Developed Countries: Some Empirical Evidences From North Africa
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The purpose of this paper is to provide an exploration and analysis of lean implementation in small and medium‐sized enterprises (SMEs) in less developed countries. Therefore, exploratory empirical evidences were collected from a survey study among a sample of 84 SMEs in North Africa. Moreover, statistical tests were conducted to assess the overall picture of lean among SMEs in this region. Although SMEs have expressed their immense need for lean, the level of its implementation is found to be very low. The findings could encourage further extensive studies to develop strategies to promote the use of lean in these countries. 相似文献
5.
Nisrine Mouhrim Ahmed El Hilali Alaoui Jaouad Boukachour 《International Journal of Sustainable Transportation》2019,13(6):419-432
Electric vehicles (EV) use an eco-friendly technology that limits the greenhouse gas emissions of the transport sector, but the limited battery capacity and the density of the battery are the major barriers to the widespread adoption of EV. To mitigate this, a good method seems to be the innovative wireless charging technology called ‘On-Line EV (OLEV)’, which is a contactless electric power transfer technology. This EV technology has the potential to charge the vehicle’s battery dynamically while the vehicle is in motion. This system helps to reduce not only the size of the battery but also its cost, and it also contributes to extending the driving range before the EV has to stop. The high cost of this technology requires an optimal location of the infrastructure along the route. For this reason, the objective of this paper is to study the problem of the location of the wireless charging infrastructure in a transport network composed of multiple routes between the origin and the destination. To find a strategic solution to this problem, we first and foremost propose a nonlinear integer programming solution to reach a compromise between the cost of the battery, which is related to its capacity, and the cost of installing the power transmitters, while maintaining the quality of the vehicle’s routing. Second, we adapt the multi-objective particle swarm optimization (MPSO) approach to our problem, as the particles were robust in solving nonlinear optimization problems. Since we have a multi-objective problem with two binary variables, we combine the binary and discrete versions of the particle swarm optimization approach with the multi-objective one. The port of Le Havre is presented as a case study to illustrate the proposed methodology. The results are analyzed and discussed in order to point out the efficiency of our resolution method. 相似文献
6.
Hind El Makrini 《Journal of Strategic Marketing》2017,25(7):530-546
Purpose: To help increase understanding of the export performance, we investigate the influence of firm size, research and development (R&D), advertising expenditures and network relationships, and develop a conceptual model to increase export intensity. Design/methodology/approach: The research involved a four-year longitudinal study of export performance of 168 exporting SMEs in Morocco (672 observations). The two-stage least square estimation (G2SLS) was used to test the hypotheses. Findings: The findings of the two-stage least square estimation (G2SLS) suggest that export sales and domestic sales are interdependent and influence each other. R&D expenditures and network affiliation have positive and significant impact on export sales, while advertising expenditure has a negative and significant influence on export sales. Research limitations/implications: Readers should use caution in generalizing the findings unless verified in other developing contexts. Practical implications: The findings of this study are useful for managers and export policy makers in developing countries. A proper understanding of the predictors of export performance may help them encourage the growth and diversification of exports that is so vital for developing countries. Originality/value: Export performance is a key element in the field of international marketing. Unfortunately, the literature exhibits a lack of empirical studies in developing countries, particularly in Maghreb regions. The empirical testing of the theoretical model in a developing economy is a significant contribution to fill the needed gap in the literature toward generalizing findings. 相似文献
7.
Dhouha El Amri 《心理学和销售学》2019,36(5):444-454
This article investigates how consumers categorize new hybrid products (NHPs). Given the limitations of the classical theories of categorization in the specific case of NHP, affordance, mobilized infrequently in marketing, turned out to be a useful categorization concept. Five types of NHP categorizations by consumers, based on the degree of affordance (low vs. high) and type of innovation (incremental vs. radical), have been detected and filled a gap in the literature on the subject. 相似文献
8.
Quality & Quantity - In Poland, as in many other countries, to measure inflation, expressed both by the CPI and HICP, the Laspeyres price index with weights from the base period is used. Thus... 相似文献
9.
It has been recently shown that rough volatility models, where the volatility is driven by a fractional Brownian motion with small Hurst parameter, provide very relevant dynamics in order to reproduce the behavior of both historical and implied volatilities. However, due to the non‐Markovian nature of the fractional Brownian motion, they raise new issues when it comes to derivatives pricing. Using an original link between nearly unstable Hawkes processes and fractional volatility models, we compute the characteristic function of the log‐price in rough Heston models. In the classical Heston model, the characteristic function is expressed in terms of the solution of a Riccati equation. Here, we show that rough Heston models exhibit quite a similar structure, the Riccati equation being replaced by a fractional Riccati equation. 相似文献
10.