首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   74篇
  免费   6篇
财政金融   14篇
计划管理   14篇
经济学   29篇
运输经济   4篇
贸易经济   5篇
农业经济   6篇
经济概况   8篇
  2024年   1篇
  2023年   3篇
  2022年   2篇
  2021年   3篇
  2020年   4篇
  2019年   4篇
  2018年   3篇
  2017年   1篇
  2016年   5篇
  2015年   2篇
  2014年   5篇
  2013年   14篇
  2012年   3篇
  2011年   4篇
  2010年   2篇
  2009年   6篇
  2008年   2篇
  2007年   1篇
  2006年   2篇
  2005年   2篇
  2004年   2篇
  2000年   1篇
  1999年   1篇
  1998年   2篇
  1997年   1篇
  1984年   1篇
  1981年   1篇
  1980年   1篇
  1978年   1篇
排序方式: 共有80条查询结果,搜索用时 31 毫秒
71.
In Japan, retirement is a gradual process that transpires over a particularly long period of time. Using large scale micro-level datasets from the Survey of Employment of the Elderly compiled by the Japanese government, we provide some stylized facts on the development of retirement behavior since the 1980s and explore factors affecting the individual retirement decision. First, we observed a general declining trend in the proportion of retired individuals aged 55–59 (especially females) while the proportion of retired individuals aged 65–69 (especially males) increased. Second, the survival analysis on actual retirement age shows that those who are more educated are more likely to retire earlier and those who experienced mandatory retirement are less likely. Third, the survival analysis on the expected retirement age shows that individuals who are satisfied with their job in terms of nonmonetary rewards are less likely to retire earlier.  相似文献   
72.
This study proposes a new scheme for the static replication of European options and their portfolios. First, a general approximation formula for efficient static replication as an extension of Carr P. and Chou A. (1997, 2002) and Carr P. and Wu L. (2002) is derived. Second, a concrete procedure for implementing the scheme by applying it to plain vanilla options under exponential Lévy models is presented. Finally, numerical examples in a model developed by Carr, P., Geman, H., Madan, D., and Yor M. (2002) are used to demonstrate that the replication scheme is more efficient and more effective in practice than a standard static replication method. © 2008 Wiley Periodicals, Inc. Jrl Fut Mark 29:1–15, 2009  相似文献   
73.
74.
This paper argues that transportation planning methodologies must be built on the central thesis of the activity-based approach to travel demand modeling, namely, that travel is a derived demand that reflects people's desire and need to participate in activities. The paper discusses why this foundation for transportation planning methodologies is necessary to address contemporary planning and policy analysis issues. The paper also argues that the introduction of time-use data, analysis and modeling is a key element in the development of the next generation of transportation planning methodologies. Following a brief review of time-use studies, the paper discusses a number of planning and policy analysis areas in which time-use data will be of particular value, including the evaluation of induced or suppressed travel demand. The concepts advanced in the paper are illustrated with two brief numerical examples. These examples show how model systems based on time-use data can be used to (i) estimate the number of induced trips that would result from a reduction in commute travel time, and (ii) evaluate the impacts of alternative transportation improvement projects.  相似文献   
75.
This paper presents an approximate formula for pricing average options when the underlying asset price is driven by time-changed Lévy processes. Time-changed Lévy processes are attractive to use for a driving factor of underlying prices because the processes provide a flexible framework for generating jumps, capturing stochastic volatility as the random time change, and introducing the leverage effect. There have been very few studies dealing with pricing problems of exotic derivatives on time-changed Lévy processes in contrast to standard European derivatives. Our pricing formula is based on the Gram–Charlier expansion and the key of the formula is to find analytic treatments for computing the moments of the normalized average asset price. In numerical examples, we demonstrate that our formula give accurate values of average call options when adopting Heston’s stochastic volatility model, VG-CIR, and NIG-CIR models.  相似文献   
76.
Lack of access to high-quality education remains a serious concern in many developing countries. This is especially the case for rural areas, including islands suffering from a shortage of skilled teachers and sufficient educational equipment. We examine the impact of introducing TV-aided model lessons in class to enhance the quality of teaching (the EQUITV project) on the national examination test scores of Mathematics and “Combined Subject” (a comprehensive subject comprising 30% science and 70% social studies and other topics) as well as English in the final year of primary education in Papua New Guinea. We employ a panel event study to capture the different timings of the intervention across schools over multiple time periods. We find that the project significantly and robustly improved test scores for girls only in English 3 years after the introduction of the project, but no improvement was seen for boys.  相似文献   
77.
This paper surveys the recent literature on the economic impacts of SARS, MERS, and COVID-19, which Asian countries have experienced in the past two decades. In particular, we provide a detailed summary of how each of the past infectious diseases has impacted on the Asian economies and the extent of that impact. This paper also documents how the governments of Asian countries have responded to the COVID-19 shocks with their economic policies, and discusses the effectiveness of these economic policies to mitigate the COVID-19 shocks on their economies.  相似文献   
78.
Environmental and Resource Economics - This paper investigates how carbon taxes affect emissions by examining British Columbia’s revenue-neutral carbon tax in the manufacturing sector. We...  相似文献   
79.
This paper explores the heterogeneous impact of a rural road improvement project on the economic activities and living standards of households in Morocco. Road pavement improvements are expected to promote better market access, encourage the transformation of traditional agricultural activities, and create opportunities for new economic activities. However, benefits may not extend evenly across different groups, and the distributional consequences call for careful empirical investigation. We employ a difference-in-differences (DID) estimation using a household-level panel dataset collected under a quasi-experimental setting in the 2010s. We classify households into three groups based on asset holdings (rich, middle, and poor). We provide several new findings. First, there was no significant transformation of agricultural production or sales for all groups. Second, rich households increased hired agricultural labor and began paid employment while middle households started new family businesses. Poor households, however, did not enjoy these new employment opportunities except for a marginal increase in family businesses. Third, due to shifts in employment, the rural road renewal project improved household consumption 3%–4% annually for rich and middle households, an impact not clearly seen among poor households. Thus, our findings show that the economic benefits of rural road improvement might not be well-inclusive.  相似文献   
80.
Tajikistan has relied on remittances by international migrants that have exceeded a quarter of annual GDP to date, despite a series of exogenous adverse events in the mid-2010s. We use a nationally representative panel dataset collected in 2013 and 2018 to explore the socio-economic characteristics of households with international migrants and migrants themselves. We provide several new findings. First, the prevalence of households with international migrants is 40%, with a substantial transition in migrant status during the research period. Second, households with international migrants are not poor, have Russian-speaking members, and are supported by an intense migration network. Third, younger, single, and more educated males comprise most of Tajikistan's international migrants. Fourth, households without Russian-speaking members or migration networks in 2013 had begun to send international migrants by 2018, while households in the richest group had exited from migration, suggesting s transition of the socio-economic composition of migrant-sending households during the mid-2010s.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号