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排序方式: 共有423条查询结果,搜索用时 15 毫秒
91.
Mohamad Y. Jaber Ahmed M.A. El Saadany 《International Journal of Production Economics》2011,131(1):115-127
Managing inventory in reverse logistics has been receiving much attention in recent years. One inventory problem that has been of interest to researchers is the production and remanufacturing model, where used items are collected and remanufactured to satisfy customer demand. The available models in the literature do not discuss the learning effects in production and remanufacturing processes. This may not be true in industries where labour costs and learning costs are expensive. By modelling these learning effects, management may use established learning models to better utilize capacity, manage inventories, and coordinate production and distribution throughout the chain.This paper extends the production, remanufacture, and waste disposal model by assuming learning to occur in both production and remanufacturing processes. However, this paper also assumes that improvements due to learning require capital investment. Mathematical models are developed, numerical examples are provided, and results are discussed. 相似文献
92.
Eldonna Sylvia Chrysanne Grund Kim S. Kimminau Arshia Ahmed Joshua M. Marr Tana Cooper 《Journal of Leadership Studies》2010,4(3):23-31
This research project was designed to study the determinants of leadership development in rural women. The first phase of the study involved individual interviews with women recognized as leaders within a rural community. Each of the 25 rural women leaders interviewed was raised on a farm or in a community with a population smaller than 2,000. The second phase of the study was administered via Survey Monkey to 133 women using a modified version of the Review of Personal Effectiveness with Locus of control (ROPELOC) instrument, which included the key domains of interest and was expanded to include additional questions focusing on unique challenges to leadership among women living in rural communities. The project used leadership‐related community groups as an entry point to identify women across rural Kansas for the survey. The results from these two methods identified six themes: lifelong learners, bias and discrimination, self‐efficacy and overcoming barriers, community influence and social capital, leadership mentors, and expression of leadership. 相似文献
93.
What determines who wins a civil war? We propose a simple model in which the power of each armed group depends on the number of combatants it is able to recruit. This is in turn a function of the relative ‘distance’ between the group leadership and potential recruits. We emphasize the moral hazard problem of recruitment: fighting is costly and risky so combatants have the incentive to defect from their task. They can also desert altogether and join the enemy. This incentive is stronger the farther away the fighter is from the principal, since monitoring becomes increasingly costly. Bigger armies have more power but less monitoring capacity to prevent defection and desertion. This general framework allows a variety of interpretations of what type of proximity matters for building strong cohesive armies ranging from ethnic distance to geographic dispersion. Different assumptions about the distribution of potential fighters along the relevant dimension of conflict lead to different equilibria. We characterize these, discuss the implied outcome in terms of who wins the war, and illustrate with historical and contemporaneous case studies. 相似文献
94.
Decisions in Economics and Finance - This paper analyzes the relationships between volatilities of five cryptocurrencies, American indices (S&P500, Nasdaq, and VIX), oil, and gold. The... 相似文献
95.
Ho Fai Chan Ahmed Skali David Stadelmann Benno Torgler Stephen Whyte 《Economics & Politics》2021,33(1):148-171
How are masculine‐looking politicians perceived by voters? Are these judgments accurate? We asked Australian survey participants to rate images of unknown‐to‐them Swiss politicians. We find that politicians with prominent markers of masculinity (including facial hair, baldness, and higher facial width‐to‐height ratio) are perceived as less honest and competent. To determine whether these perceptions correlate with political behavior, we exploit two unique features of Swiss politics. First, to check for politician–voter congruence, we match each politician's voting record to that of their constituents on identically worded legislative proposals. We find that bearded politicians are less likely to behave according to constituents' preferences. Second, by exploiting the mandatory disclosure of lobby group affiliations, we show that bearded politicians are less likely to be captured by interest groups. Our results suggest that more masculine‐looking politicians are recognized by both voters and lobby groups as less amenable to being controlled. 相似文献
96.
Kevin Hjortshøj O’Rourke Ahmed S. Rahman Alan M. Taylor 《Journal of Economic Growth》2013,18(4):373-409
Technological change was unskilled-labor-biased during the early industrial revolution, but is skill-biased today. This implies a rich set of non-monotonic macroeconomic dynamics which are not embedded in extant unified growth models. We present historical evidence and develop a model which can endogenously account for these facts, where factor bias reflects profit-maximizing decisions by innovators. In a setup with directed technological change, and fixed as well as variable costs of education, initial endowments dictate that the early industrial revolution be unskilled-labor-biased. Increasing basic knowledge then causes a growth takeoff, an income-led demand for fewer but more educated children, and a transition to skill-biased technological change in the long run. 相似文献
97.
Triplett Russell Chatterjee Chiradip Johnson Christopher K. Ahmed Parvez 《International Advances in Economic Research》2019,25(2):195-208
International Advances in Economic Research - When faced with the fear of low-quality tap water, households are motivated to seek out and use alternatives. This study investigated the role of... 相似文献
98.
This study investigates short- and long-run bidirectional causality between institutional quality and sectoral-level FDI in Pakistan by using the ARDL technique. The results confirm that long-run bidirectional causality exists between institutional quality and aggregate FDI. The in-depth sectoral-level FDI analysis substantiates the presence of long-run bidirectional causality between institutional quality and FDI in services and manufacturing sectors, while no long-run causality is observed between institutional quality and FDI inflows in primary sector. Furthermore, the results in the study reveal short-run bidirectional causality only between institutional quality and manufacturing FDI and report insignificant short-run causal link between institutional quality and FDI in primary and services sectors. The overall findings of the study suggest that in the long-run institutional quality attract FDI and FDI inflows, particularly to manufacturing and services sectors, significantly enhance the quality of institutions in Pakistan. 相似文献
99.
We study the relationship between trust in an experiment and trust measured by means of popular survey items in different countries. Students from Chile, Colombia, India, Mexico and Sweden participate in a public goods game experiment and answer a set of standard attitudinal survey questions about trust. We find that behavioral trust and attitudinal trust significantly differ among countries. Behavioral trust is highest in Sweden, followed by Latin America, and lowest in India. Attitudinal trust is highest in Chile and Sweden, followed by India and Mexico, and lowest in Colombia. Further, the predictive power of survey items also differs among countries. Trust measured by survey items is significantly related to behavioral trust in some but not in all societies. No single survey item predicts actual trust across all countries. Plausible explanations of the inconsistent relationship between behavioral and attitudinal trust across countries are discussed. 相似文献
100.
Qualitative analysis of feminine morality and visible personality characteristics among young adults
This article documents the perceptions and judgments of youth about character of female as ‘good’ or ‘bad’, based on her visible personality characteristics. A qualitative study is carried out among the undergraduate students in two public sector universities. This study highlights contextual factors linked with the choice of clothing and quality of physical appearance among young girls. The judgments about a girl’s character are based on immediate, apparent personality characteristics. This study found that there are two contrasting categories of clothing and visible personality associated with positive and negative feminine morality. Certain expectations are also found to be associated with the attire of young women in Pakistani society which restricts their individual choices. Pakistani and Britain national boys judged girl’s character as immoral or bad based on cosmetics usage, fashion-ability, body exposedness, physical attractiveness, friendliness, bold temperament, and easiness while interaction with boys. 相似文献