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   742篇
  免费   25篇
财政金融   116篇
工业经济   78篇
计划管理   130篇
经济学   191篇
综合类   3篇
运输经济   13篇
旅游经济   14篇
贸易经济   132篇
农业经济   23篇
经济概况   45篇
邮电经济   22篇
  2023年   8篇
  2022年   6篇
  2021年   13篇
  2020年   16篇
  2019年   23篇
  2018年   30篇
  2017年   29篇
  2016年   27篇
  2015年   21篇
  2014年   30篇
  2013年   91篇
  2012年   34篇
  2011年   30篇
  2010年   35篇
  2009年   36篇
  2008年   43篇
  2007年   45篇
  2006年   19篇
  2005年   19篇
  2004年   25篇
  2003年   31篇
  2002年   24篇
  2001年   17篇
  2000年   17篇
  1999年   13篇
  1998年   12篇
  1997年   8篇
  1996年   3篇
  1995年   4篇
  1994年   5篇
  1993年   2篇
  1992年   5篇
  1991年   3篇
  1989年   3篇
  1988年   2篇
  1987年   3篇
  1986年   2篇
  1985年   3篇
  1984年   4篇
  1983年   5篇
  1982年   4篇
  1980年   2篇
  1978年   2篇
  1974年   2篇
  1970年   1篇
  1962年   1篇
  1961年   1篇
  1960年   1篇
  1958年   1篇
  1956年   1篇
排序方式: 共有767条查询结果,搜索用时 15 毫秒
111.

We discuss the strengths and weaknesses of five alternative innovation indicators: R&D, patent applications, total innovation expenditure and shares in sales taken by imitative and by innovative products as they were measured in the 1992 Community Innovation Survey (CIS) in the Netherlands. We conclude that the two most commonly used indicators (R&D and patent applications) have more (and more severe) weaknesses than is often assumed. Moreover, our factor analysis suggests that there is little correlation between the various indicators. This underlines the empirical relevance of various sources of bias of innovation indicators as discussed in this paper.  相似文献   
112.
Despite evidence that information technology (IT) has recently become a productive investment for a large cross-section of firms, a number of questions remain. Some of these issues can be addressed by extending the basic production function approach that was applied in earlier work. Specifically, in this short paper we: 1) control for individual firm differences in productivity by employing a ‘firm effects’ specification, 2) consider the more flexible translog specification instead of only the Cobb-Douglas specification, and 3) allow all parameters to vary between various subsectors of the economy.

We find that while ‘firm effects’ may account for as much as half of the productivity benefits imputed to IT in earlier studies, the elasticity of IT remains positive and statistically significant. We also find that the estimates of IT elasticity and marginal product are little-changed when the less restrictive translog production function is employed. Finally, we find only limited evidence of differences in IT's marginal product between manufacturing and services and between the ‘measurable’ and ‘unmeasurable’ sectors of the economy. Surprisingly, we find that the marginal product of IT is at least as high in firms that did not grow during 1988–1992 sample period as it is in firms that grew.  相似文献   
113.
This paper examines how established firms use their core competences to diversify their business by exploring and ultimately developing green technologies. In contrast to start‐ups dedicated to a green mission, diversifying into green markets by developing new products based on existing core competences has proven to be challenging. This is because the exploration processes to find a match between green technology opportunities and internal competences is complex and new to most established firms. This paper gains insights into exploration processes for green technologies and the learning modes and outcomes linked to these processes. We examined exploration processes at the microlevel in an embedded case study of an engineering firm using a combination of the “fireworks” innovation process model and organizational learning theory. First, we found that developing green technologies involves a long‐term exploratory process without guarantee of (quick) success and likely involves many exploration failures. Second, as exploration unfolds along multiple technology trajectories, learning occurs in individual exploration paths (on‐path), when new paths are pursued (path‐initiation), and when knowledge from one path is spilled over to subsequent paths (across‐paths). Third, to increase their chances for success, firms can increase the efficiency of exploration by fostering a failure‐friendly organizational culture, deliberately experimenting, and purposefully learning from failures.  相似文献   
114.
Operating leases are used extensively for financing, but their ability to separate ownership and use also creates hedging opportunities. We investigate whether firms recognize such opportunities by examining the relation between chief executive officer (CEO) risk-taking incentives and the use of operating leases. Consistent with firms using operating leases to hedge, we find higher CEO risk-taking incentives lower operating lease intensity. To address endogeneity, we use the adoption of Statement of Financial Accounting Standards 123R as an exogenous shock to option compensation, dynamic panel generalized method of moments, simultaneous equations, and change regressions. Our results are robust to placebo and alternative tests.  相似文献   
115.
Recent theoretical findings in the trade literature suggest that economic integration agreements (EIAs) not only increase the level of trade but also make it more stable and predictable. This paper proposes a Hausman–Taylor quantile regression approach to identify the causal effect of EIA membership on trade predictability. The proposed methodology accounts for group effects in the gravity equation and is computationally efficient. Our results corroborate the theoretical findings that EIAs make trade more stable and predictable and this conclusion is even stronger for deeper EIAs.  相似文献   
116.
Do sovereign bond markets react systematically to microeconomic policy reforms? Some observers suggest that investors are very attentive to supply‐side policies such as those related to labor markets, corporate taxation, and product standards. They argue that, along with macroeconomic outcomes and broad financial market conditions, such reforms affect sovereign bond premiums, for developed as well as emerging economies. In contrast, we predict few systematic effects of supply‐side policy reforms on sovereign bond market outcomes. Our theory draws on a standard three‐equation model of the economy, widely accepted among economic and finance professionals. That model makes few clear predictions regarding the anticipated effects of microeconomic policy changes; as a result, we expect that such reforms will not generate systematic market reactions. Our analyses, based on daily data from 37 countries from 2004 to 2012, indeed reveal little evidence of a systematic bond market reaction to the 47 most significant reforms to corporate taxation and labor market regulation. These results call into question the notion that “bond market vigilantes” play a central role in compelling governments to enact specific microeconomic policy changes.  相似文献   
117.
This paper examines how policies regulating the cross‐border movement and domestic use of electronic data on the internet impact the productivity of firms in sectors relying on electronic data. In doing so, we collect regulatory information on a group of developed economies and create an index that measures the regulatory restrictiveness of each country's data policies. The index is based on observable policy measures that explicitly inhibit the cross‐border movement and domestic use of data. Using cross‐country firm‐level and industry‐level data, we analyse econometrically the extent to which these data regulations over time impact the productivity performance of downstream firms and industries, respectively. We show that stricter data policies have a negative and significant impact on the performance of downstream firms in sectors reliant on electronic data. This adverse effect is stronger for countries with strong technology networks, for servicified firms, and holds for several robustness checks.  相似文献   
118.
This article examines the evolution of wealth inequality in Sweden from 1750 to 1900, contributing both to the debate on early modern and modern inequality and to the general debate on the pattern of inequality during industrialization. The pre‐industrial period (1750–1850) is for the first time examined for Sweden at the national level. The study uses a random sample of probate inventories from urban and rural areas across the country, adjusted for age and social class. Estimates are provided for the years 1750, 1800, 1850, and 1900. The results show a gradual growth in inequality as early as the mid‐eighteenth century, with the sharpest rise in the late nineteenth century. Whereas the early growth in inequality was connected to changes in the countryside and in agriculture, the later growth was related to industrialization encompassing both compositional effects and strong wealth accumulation among the richest. The level of inequality in Sweden in 1750 was lower than for other western European countries, but by 1900 Sweden was just as unequal.  相似文献   
119.
Within four years now, the German Renewable Energy Resources Act (EEG) has been amended in 2016 for the third time. The main point of the current reform is the extension of bidding schemes to determine the remuneration of renewable power generation. The articles analyses whether or not the expected decrease in costs and improvement of deployment control could ever occur, and considers the critique of thwarting the energy transition and jeopardising the diversity of actors involved in the industry.  相似文献   
120.
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