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   5522篇
  免费   257篇
  国内免费   99篇
财政金融   422篇
工业经济   253篇
计划管理   1381篇
经济学   1093篇
综合类   833篇
运输经济   53篇
旅游经济   86篇
贸易经济   680篇
农业经济   495篇
经济概况   581篇
信息产业经济   1篇
  2024年   3篇
  2023年   68篇
  2022年   54篇
  2021年   119篇
  2020年   160篇
  2019年   92篇
  2018年   103篇
  2017年   139篇
  2016年   137篇
  2015年   152篇
  2014年   332篇
  2013年   450篇
  2012年   426篇
  2011年   516篇
  2010年   395篇
  2009年   395篇
  2008年   439篇
  2007年   424篇
  2006年   376篇
  2005年   247篇
  2004年   199篇
  2003年   154篇
  2002年   116篇
  2001年   84篇
  2000年   76篇
  1999年   43篇
  1998年   34篇
  1997年   26篇
  1996年   30篇
  1995年   10篇
  1994年   12篇
  1993年   8篇
  1992年   13篇
  1991年   15篇
  1990年   2篇
  1989年   4篇
  1988年   6篇
  1987年   5篇
  1986年   6篇
  1985年   2篇
  1984年   3篇
  1983年   1篇
  1981年   2篇
排序方式: 共有5878条查询结果,搜索用时 15 毫秒
1.
半导体行业作为自主可控领域的核心基础产业,是国家的战略性、先导性产业.中国需要抓住时机,推动半导体产业的进一步发展.收集了2014—2019年中国半导体产业的相关数据,以柯布-道格拉斯生产函数为基础,选定4个影响因素建立回归模型,对模型进行检验和修正.经过分析得出,影响中国半导体产业发展的关键因素是研发投入和产业集聚度,中国应该主要从这两方面发力,推动半导体行业的发展.  相似文献   
2.
We study a tug-of-war game between two players using the lottery contest success function (CSF) and a quadratic cost (of effort) function. We construct a pure strategy symmetric Markov perfect equilibrium of this game, show that it is unique, and provide closed-form solutions for equilibrium strategies and values. In stark contrast to a model of tug-of-war with an all-pay auction CSF, players exert positive efforts until the very last battle in this equilibrium. We deliver a set of empirically appealing results on effort dynamics.  相似文献   
3.
During the COVID-19 pandemic, different nations have adopted a variety of response strategies to fight and contain the new coronavirus. Such national response strategies can be classified into three categories based on their underlying philosophy: strict control with unlimited resources, relentless contribution with limited resources, and rough rationality with limited resources. We discuss the philosophies, characteristics, and performances of the three response strategies and when they should be adopted. We also examine what marketing innovation strategies enterprises should adopt to survive and grow their businesses in both the short and long term. This study provides important strategic implications for national policymakers and enterprises on the use of response strategies as well as marketing innovation tactics and strategies to be used both during and after the pandemic.  相似文献   
4.
资本市场应当主导我国金融市场由资金配置向资本配置转型、由不动产金融向动产金融转型,同时主导我国生产要素市场化改革。资本市场在经济活动中发挥主导作用的关键在于提升其价值发现能力,而当前我国资本市场价值发现能力欠缺有多方面深层次原因:一是对资产和资金的包容和汇聚不够,二是资本的流动和配置受到制约,三是定价机制受到一定程度的扭曲,四是产权制度不完善,五是市场主体归位尽责情况不理想,六是金融衍生品市场不够成熟。本文建议:一是完善多层次资本市场建设,二是推动市场多空机制均衡发展,三是纠偏资本市场定价机制,四是加速完善现代产权制度,五是强化对市场各主体的培育,六是加强资本市场高质量对外开放。  相似文献   
5.
Understanding the effect of managerial response on online review management has attracted the attention of scholars in recent years. However, the effect of personalized managerial response on the negative inconsistent review is a lack of evidence. This study investigates how personalized managerial responses influence negative review helpfulness according to the various levels of review inconsistency and the underlying mechanism behind the effect. We adopted a secondary data analysis based on the TripAdvisor dataset and used an online experiment study to investigate the impact mechanism. Findings reveal that the personalized managerial response positively influences review helpfulness, review inconsistency (negative rating with positive textual sentiment) moderates the effect of personalized managerial response on review helpfulness, and perceived response helpfulness mediates the above relationships. More specifically, personalized managerial response to negative inconsistent reviews has a pronounced effect on consumers’ perception of response helpfulness and their evaluation of review helpfulness. This study improves the current understanding of managerial responses, and provides practical guidance for hoteliers, consumers, and travel websites.  相似文献   
6.
Using a novel data set for the U.S. states, this paper examines whether household debt and the protracted debt deleveraging help explain the dismal performance of U.S. consumption since 2007 in the aftermath of the housing bubble. By separating the concepts of deleveraging and debt overhang—a flow and a stock effect—we find that excessive indebtedness exerted a meaningful drag on consumption over and beyond wealth and income effects. The overall effect, however, is modest—‐around one sixth of the slowdown in consumption between 2000–06 and 2007–12—and mostly driven by states with particularly large imbalances in their household sector. This might be indicative of non‐linearities, whereby indebtedness begins to bite only when misalignments from sustainable debt dynamics become excessive.  相似文献   
7.
We study a location-allocation-routing problem for distribution of the injured in a disaster response scenario, considering a three-type transportation network with separate links. A circle-based approach to estimate the impacts of the disaster is presented. After formulating relations for computing the percentage of the injured, the destruction percentage and the damage-dependent travel times, the problem is formulated as an integer nonlinear program. We utilize a genetic algorithm and a discrete version of the imperialist competitive algorithm for solving large problems. An empirical study focused on earthquakes in Tabriz, Iran, illustrates applicability of the proposed model and performance of the proposed algorithms.  相似文献   
8.
This paper discusses the specifics of forecasting using factor-augmented predictive regressions under general loss functions. In line with the literature, we employ principal component analysis to extract factors from the set of predictors. In addition, we also extract information on the volatility of the series to be predicted, since the volatility is forecast-relevant under non-quadratic loss functions. We ensure asymptotic unbiasedness of the forecasts under the relevant loss by estimating the predictive regression through the minimization of the in-sample average loss. Finally, we select the most promising predictors for the series to be forecast by employing an information criterion that is tailored to the relevant loss. Using a large monthly data set for the US economy, we assess the proposed adjustments in a pseudo out-of-sample forecasting exercise for various variables. As expected, the use of estimation under the relevant loss is found to be effective. Using an additional volatility proxy as the predictor and conducting model selection that is tailored to the relevant loss function enhances the forecast performance significantly.  相似文献   
9.
提出了一种由单形规范线性分段(SCPWL)函数与记忆多项式级联的数字预失真器,并给出了复数域两步最小二乘参数辨识算法。不同于以往一种预失真器适用一种功放模型的情况,所提的预失真算法利用SCPWL函数的分段特性以及记忆多项式的非线性记忆特性,在完成参数辨识的同时自动地调整结构,可适用于传统以及强非线性新型功放模型的线性化补偿。将所提预失真器分别应用于传统记忆多项式、两箱模型以及新型包络跟踪功放。经过计算机仿真,功放输出的幅频特性和频谱曲线表明所提预失真器能够有效地补偿多种功放的非线性特性。算法仿真比较结果也表明,针对包络跟踪功放,所提复数两步最小二乘算法的邻道泄漏比(ACLR)可改善约35 dB,性能优于最小均方(LMS)类算法约30 dB。  相似文献   
10.
ABSTRACT

A study of 216 respondents examined a medical center environment’s influence on patient responses. A stimulus–organism–response (S-O-R) model was adapted to the theory that more hospitable healthcare servicescape elements will affect patients’ overall satisfaction with healthcare experience, loyalty intentions, and willingness to pay out-of-pocket expenses for healthcare services. Servicescape elements included atmospherics of the healthcare environment, service delivery by healthcare staff, physical design of the healthcare environment, and wayfinding. Results of structural equation modeling confirmed that the four servicescape elements – had a significant impact on patients’ overall satisfaction with the healthcare experience. Furthermore, overall satisfaction with the healthcare experience predicted patients’ loyalty intentions and willingness to pay out-of-pocket expenses for healthcare services. The study makes a significant contribution to the empirical modeling of patients’ behavioral responses to hospitable healthcare environments.  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