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   631篇
  免费   8篇
  国内免费   3篇
财政金融   34篇
工业经济   10篇
计划管理   61篇
经济学   107篇
综合类   34篇
运输经济   79篇
旅游经济   189篇
贸易经济   74篇
农业经济   18篇
经济概况   36篇
  2024年   4篇
  2023年   13篇
  2022年   1篇
  2021年   21篇
  2020年   28篇
  2019年   20篇
  2018年   28篇
  2017年   34篇
  2016年   16篇
  2015年   20篇
  2014年   35篇
  2013年   93篇
  2012年   35篇
  2011年   57篇
  2010年   36篇
  2009年   24篇
  2008年   24篇
  2007年   32篇
  2006年   25篇
  2005年   19篇
  2004年   10篇
  2003年   16篇
  2002年   8篇
  2001年   10篇
  2000年   7篇
  1999年   7篇
  1998年   6篇
  1997年   1篇
  1996年   2篇
  1995年   2篇
  1993年   4篇
  1991年   1篇
  1984年   1篇
  1983年   1篇
  1979年   1篇
排序方式: 共有642条查询结果,搜索用时 15 毫秒
21.
This article uses travel distance to segment rural tourists in a tourist destination in the U.S. Midwest. A distance decay pattern was identified, with more than half of the respondents traveling from a location within 200 miles of the destination. The differences in the socio‐demographic, trip‐related characteristics, and destination activities of these tourists were examined across distinct distance segments. Among other findings, the study revealed that tourists from within a 50‐mile radius participated in most of the activities, and those traveling between 200 and 600 miles made up the majority of business travelers. These two segments also had a higher participation rate in the recreational activities than did the other distance segments. The findings of the study show that simple variables such as distance travel remain viable for destinations, particularly those in the rural area, to understand the tourists for segmentation purpose.  相似文献   
22.
Abstract

Knowledge of people's travel motivations and its association with destination selection plays a critical role in predicting future travel patterns. The objectives of this study were to uncover the underlying push and pull factors of motivation associated with British outbound pleasure travelers as well as to identify key motivational factors that have significant effects on destination choice. Six push factors and five pull factors were found. “Knowledge seeking” and “cleanliness & safety” were perceived as the most important push and pull factors respectively. The results of logistic regression analyses snowed that the British tend to visit the U.S. for “fun & excitement” and “outdoor activities,” Oceania for “family & friend togetherness,” and Asia to seek a “novel experience.” The findings of differential motivational factors across seven destinations suggest that a destination can capitalize on its strengths with an optimal combination of push and pull factors to attract and retain the British travelers.  相似文献   
23.
The spatial dimension of tourism provides insights about travel demands and travel flows and helps destinations in planning, development and management. The last decade has witnessed a steady and rapid growth in the Asia-Pacific region's tourism industry, in terms of both inbound and outbound travel. This particular study aimed to: (a) provide information and explore the changes on the nature of travel flows as measured by the tourist arrivals among the Pacific Asia Travel Association (PATA) member countries for the years of 1995 and 2004; (b) assess general propensity to travel among PATA countries using the concepts of Country Potential Generation Index and Gross Travel Propensity; and (c) examine the shift in the past decade in terms of the relative tourism generation power of PATA countries by comparing and contrasting the 1995 and 2004 indices. The results of the study provide an overview of the spatial patterns of travel flows and travel propensity in Pacific Asia region over a 10-year period. The study demonstrates that the functions of travel flows and indices are complementary and provide an informative picture of spatial travel behavior and demand.  相似文献   
24.
Leo Huang   《Tourism Management》2006,27(6):1308-1320
E-travel agencies adopt B2B strategic alliances in order to strengthen their competitive advantages in the e-commerce travel market and because they are an effective tool to gain wider sustainable gains. External environmental and internal organizational factors impacting the success of strategic alliances model are themselves a crucial issue. This study uses multiple methods to collect data from multiple sources and uses qualitative and quantitative surveys. A two-stage research design is adopted to explore the present strategic alliances between Taiwan's wholesaler e-travel agencies and retailer sub-agencies. The results provide an in-depth understanding into the B2B e-commerce strategic alliance model. According to this research, Taiwanese e-travel agencies consider three external environment uncertainties, five internal organization motivations, five partner selection criteria, and two performance measurements of alliance strategies. Finally, the paper proposes an optimal B2B e-commerce strategic alliance model that matches the essential development needs of B2B e-commerce and overcomes the environmental uncertainties.  相似文献   
25.
Efficiency of travel agencies: A case study of Alicante,Spain   总被引:2,自引:0,他引:2  
This study analyses the relative efficiency of 22 travel agencies of similar characteristics based in Alicante (Spain). This analysis is carried out using the Data Envelopment Analysis (DEA) technique and smoothed bootstrap. Following the analysis, possible lines of action that the agencies can take in order to improve their efficiency in the future are provided. Finally, using the Mann Whitney U Test, the relationship, or lack thereof, between the levels of efficiency of these agencies and their ownership type, location and level of experience is examined.  相似文献   
26.
Tax policy analysis in heterogeneous-agent models typically involves the use of smooth tax functions to approximate complex present tax law and proposed reforms. In this paper, we explore the extent to which the tax detail omitted under this conventional approach has macroeconomic implications relevant for policy analysis. To do this, we develop an alternative approach by embedding an internal tax calculator into a large-scale overlapping generations model that, while conditioning on idiosyncratic household characteristics, explicitly models key provisions in the Internal Revenue Code applied to labor income. We find that for a debt-constant steady state analysis of a given tax policy change, both approaches generate similar policy-induced patterns of macroeconomic activity despite variation in the underlying patterns of household tax-preferred consumption and labor supply behavior. However, this variation in underlying behavior is associated with significant quantitative and qualitative differences in macroeconomic aggregates along a debt-financed transition path immediately following a policy change. Consequentially, although the use of unconditional smooth tax functions may be a reasonable modeling simplification for steady state analysis of tax policy, caution should be taken for their use in transition path analysis within heterogeneous-agent models.  相似文献   
27.
It is well-known that endogenous cycles can occur in Ramsey models with heterogeneous households and borrowing constraints. In this note, we address the issue of robustness in the more general case of endogenous labor supply and we explain the occurrence of local indeterminacy under progressive taxation.
Thomas Seegmuller (Corresponding author)Email:
  相似文献   
28.
29.
Abstract

Objective:

Asthma is one of the most common childhood illnesses and accounts for a substantial amount of pediatric emergency department visits. Historically, acute exacerbations are treated with a beta agonist via nebulizer therapy (NEB). However, with the advent of the spacer, the medication can be delivered via a metered dose inhaler (MDI?+?S) with the same efficacy for mild-to-moderate asthma exacerbations. To date, no study has been done to evaluate emergency department (ED) length of stay (LOS) and opportunity cost between nebulized vs MDI?+?S. The objective of this study was to compare ED LOS and associated opportunity cost among children who present with a mild asthma exacerbation according to the delivery mode of albuterol: MDI?+?S vs NEB.

Methods:

A structured, retrospective cross-sectional study was conducted. Medical records were reviewed from children aged 1–18 years treated at an urban pediatric ED from July 2007 to June 2008 with a discharge diagnosis International Classification of Disease-9 of asthma. Length of stay was defined: time from initial triage until the time of the guardian signature on the discharge instructions. An operational definition was used to define a mild asthma exacerbation; those patients requiring only one standard weight based albuterol treatment. Emergency department throughput time points, demographic data, treatment course, and delivery method of albuterol were recorded.

Results:

Three hundred and four patients were analyzed: 94 in the MDI?+?S group and 209 in the NEB group. Mean age in years for the MDI?+?S group was 9.57 vs 5.07 for the NEB group (p?<?0.001). The percentage of patients that received oral corticosteroids was 39.4% in the MDI?+?S group vs 61.7% in the NEB group (p?<?0.001). There was no difference between groups in: race, insurance status, gender, or chest radiographs. The mean ED LOS for patients in the MDI?+?S group was 170 minutes compared to 205 minutes in the NEB group. On average, there was a 25.1 minute time savings per patient in ED treatment time (p?<?0.001; 95% CI?=?3.8–31.7). Significant predictors of outcome for treatment time were chest radiograph, steroids, and treatment mode. Opportunity cost analysis estimated a potential cost savings of $213,532 annually using MDI?+?S vs NEB.

Conclusion:

In mild asthma exacerbations, administering albuterol via MDI?+?S decreases ED treatment time when compared to administering nebulized albuterol. A metered dose inhaler with spacer utilization may enhance opportunity cost savings and decrease the left without being seen population with improved throughput.

Limitations:

The key limitations of this study include its retrospective design, the proxy non-standard definition of mild asthma exacerbation, and the opportunity cost calculation, which may over-estimate the value of ED time saved based on ED volume.  相似文献   
30.
Abstract

Introduction:

SURGIFLO? and FLOSEAL® are absorbable gelatin-based products that form hemostatic matrices. These products are indicated as adjuncts to hemostasis when control of bleeding by conventional surgical techniques (such as suture, ligature or cautery) is ineffective or impractical. This study analyzed the effect of surgery time and the choice of product on cost to the hospital and patient outcomes.  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