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141.
目前集成技术飞速发展且集成芯片已被广泛应用 ,为了充分利用集成在一个芯片上的两个运算放大器性能互相匹配的特点 ,本文从三个方面介绍了合理使用集成运算放大器的几种技巧。其中 ,利用集成在一个硅片上的两个运算放大器的输入失调电压极其温度漂移相互补偿的原理 ,组成了失调电压极低的运算放大器 ;根据输入电阻的自举扩展原理 ,利用集成在一个硅片上的两个运算放大器组成的反向比例运算放大器具有很高的输入电阻和较高的电压放大倍数 ;根据差动放大电路的输出电压方式 ,利用集成在一个硅片上的两个运算放大器组成的差动输出运算放大器 ,最大线性输出电压范围比一个集成运算放大器的最大线形输出电压范围大一倍。且适用于不接地负载。 相似文献
142.
Research summary: Investing a firm's resources in corporate social responsibility (CSR) initiatives remains a contentious issue. While research suggests firm financial performance is the primary driver of CEO dismissal, we propose that CSR will provide important additional context when interpreting a firm's financial performance. Consistent with this prediction, our results suggest that past CSR decisions amplify the negative relationship between financial performance and CEO dismissal. Specifically, we find that greater prior investments in CSR appear to expose CEOs of firms with poor financial performance to a greater risk of dismissal. In contrast, greater past investments in CSR appear to help shield CEOs of firms with good financial performance from dismissal. These findings provide novel insight into how CEOs' career outcomes may be affected by earlier CSR decisions. Managerial summary: In this study, we examined a potential personal consequence for CEOs related to corporate social responsibility (CSR). We explored the role prior investments in CSR play when a board evaluates the firm's financial performance and considers whether or not to fire the CEO. Our results suggest that while financial performance sets the overall tone of a CEO's evaluation, CSR amplifies that baseline evaluation. Specifically, our results suggest that greater past investments in CSR appear to (a) greatly increase the likelihood of CEO dismissal when financial performance is poor, and (b) somewhat reduce the likelihood of CEO dismissal when financial performance is good. Thus, striving to deliver profits in a socially responsible manner may have both positive and negative personal consequences. Copyright © 2017 John Wiley & Sons, Ltd. 相似文献
143.
以我国能源电力类上市公司为样本,对其股权结构与公司绩效的关系提出假设并做了分析。实证结果与文章提出的3个假设相吻合:能源电力类上市公司股权结构中,第一大股东持股比例与公司绩效显著正相关;股权制衡度与公司绩效显著正相关;高管持股与公司绩效正相关,但不显著。结论还表明:公司规模、托宾Q值、投资支出等都与公司绩效显著正相关;资产负债率与公司绩效显著负相关。这些结论可为我国能源电力类上市公司改善股权结构、提高公司绩效提供一些思路。 相似文献
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Research in marketing suggests that collaborative communication is important for firms to sustain competitive advantage, especially in industrial markets. This study integrates relational and resource-based views to articulate how collaborative communication influences different relational performance metrics. Based on a survey of 167 marketing executives in Taiwan's electronics industry, empirical findings indicate that market-relating capabilities (i.e., market-linking and marketing capabilities) completely mediate the collaborative communication–financial performance relationship, while market-relating capabilities partially mediate the collaborative communication–customer-focused performance relationship. In addition, collaborative communication directly influences customer cooperation performance instead of indirectly affecting it through the development of market-relating capabilities. The results of this study provide new insights into the role of collaborative communication as well as important theoretical and managerial implications. 相似文献
146.
We study how intra‐industry product diversity affects firm performance by analyzing the implications of expanding a firm's product line within its core business. We conjecture that increases in product diversity initially undermine performance because of negative transfer effects but then improve it due to economies of scope. We further theorize that this U‐shaped effect of product diversity becomes more pronounced as the firm increases the intensity of its technology investment, yet is likely to be attenuated by the firm's accumulated experience with intra‐industry diversification. Data on 156 U.S.‐based software firms operating from 1990 to 2001 furnish support for these conjectures. Our study advances emerging research on intra‐industry diversification by underscoring some of its contingent performance effects. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
147.
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149.
《Food Policy》2017
We report on the prevalence and patterns of non-farm enterprises in six sub-Saharan African countries, and study their performance in terms of labor productivity, survival and exit, using the World Bank’s Living Standards Measurement Study - Integrated Surveys on Agriculture (LSMS-ISA). Rural households operate enterprises due to both push and pull factors and tend to do so predominantly in easy-to-enter activities, such as sales and trade, rather than in activities that require higher starting costs, such as transport services, or educational investment, such as professional services. Labor productivity differs widely: rural and female-headed enterprises, those located further away from population centers, and businesses that operate intermittently have lower levels of labor productivity compared to urban and male-owned enterprises, or enterprises that operate throughout the year. Finally, rural enterprises exit the market primarily due to a lack of profitability or finance, and due to idiosyncratic shocks. 相似文献
150.