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The Armington procedure (AP) has become increasingly popular in agricultural trade analyses. However, some arguments have arisen concerning the relevance of using the procedure for such analyses. This study examines the assumptions commonly made when using the Armington procedure and suggests modifications for agricultural trade analyses. Results from models utilizing rice-trade data suggest that the assumptions of the single constant elasticity, in particular, may not be appropriate for analyzing agricultural trade. These results also suggest that, with proper modifications, the AP can be applied to agricultural trade. Further, results of a modified Armington procedure indicate that trade in rice exports is highly competitive and that changes in market shares of individual exporters are not independent of changes in budget expenditure allocated to imports. 相似文献
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To the Rescue!? Brokering a Rapid,Scaled and Customized Compassionate Response to Suffering after Disaster 下载免费PDF全文
Suffering comes in many forms that significantly impact organizations’ operations and performance. As a result, recent research on compassion organizing seeks to explain how efforts to notice, feel, and respond to suffering create organizational (and societal) benefits. Widespread suffering can be generated by natural disasters, which in turn can trigger compassionate organizational responses. In this paper, we build on social capital theory to theorize about how compassionate ventures leverage network relationships to identify and mobilize resources. We also explore how differences in these approaches influence the magnitude, speed, and customization of the response, all of which are theorized indicators of the effectiveness of compassion organizing in alleviating suffering. We use structural equation modelling to test our model and find that compassionate ventures with stronger ties to the local community are more likely to bundle (i.e., stretch) resources, which facilitates a speedy, customized, and large magnitude response. In contrast, those with stronger ties outside the local community are more likely to pursue (i.e., chase) new resources, which results in a large magnitude response, but one that is not associated with speed or customization. We discuss the implications of our findings and make recommendations for future research. 相似文献
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Policy Determinants of School Outcomes under Model Uncertainty: Evidence from South Africa 下载免费PDF全文
Fabrice Murtin Thomas Laurent Geoff Barnard Dean Janse van Rensburg Vijay Reddy George Frempong Lolita Winnaar 《The South African journal of economics. Suid-afrikaanse tydskrif vir ekonomie》2015,83(3):317-334
In this paper, we assess the determinants of secondary school outcomes in South Africa. We use Bayesian model averaging techniques to account for uncertainty in the set of underlying factors that are chosen among a very large pool of explanatory variables in order to identify the subset of explanatory variables most strongly associated with the dependent variable. Our analysis indicates that the socio‐economic background of pupils, demographic characteristics such as population groups (Black and White), as well as geographical locations account for a significant variation in pupils’ achievement levels. We also find that the most robust policy determinants of pupils’ test scores are the availability of a library at school, the use of IT in the classroom as well as school climate. 相似文献
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We use the US International Trade Commission's uniquely detailed 1995–2007 Chinese Customs data to better understand the pattern of trade between China and its two largest trading partners, Japan and the United States. Our review finds that only a small share of these flows can be characterized as arm's length, one-way trade in final goods. Instead, we find extensive two-way trade, deep vertical specialization, concentration of trade in computer and communication devices, and a prominent role for foreign-invested enterprises. While these characteristics define both bilateral relationships, important differences between the two pairs do emerge, suggesting that trade costs influence the method by which multinationals choose to integrate their production with China. Consequently, we argue that dialogue on East Asian trade liberalization should include the possibility of significant production gains for the US from its inclusion in any regional agreements. 相似文献
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Brian Levine Linda Nozick Dean Jones 《Transportation Research Part E: Logistics and Transportation Review》2009,45(4):611-626
Containerized freight imports into the US are growing at an average of 10% per year. This traffic is concentrated at a small number of US seaports. It is therefore important to have an accurate understanding of the flow of containers from their origin country through these seaports to their final destination. This paper develops an optimization model to estimate route flows and a corresponding multi-modal origin–destination table for containers by synthesizing data on international trade and railcar movements with a gravity model for the demand of container traffic. This analysis provides insights into the balance of rail and truck inland transportation from each port. 相似文献
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Dean M. Schroeder 《战略管理杂志》1990,11(1):25-41
The paper lays the foundation for building a dynamic theory of the impact of process innovation upon competitive strategies. An innovation is tracked over two and a half decades to observe changing patterns in competition resulting from ongoing innovation development, emerging complementary technologies, and expanding use. The study finds that the innovation created competitive opportunities and threats for both firms that adopted it and those that did not. 相似文献
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Dean A. Paxson 《The Journal of Real Estate Finance and Economics》2007,34(1):135-157
Property development activities often occur in stages, which are appropriately modeled as sequential American exchange property
options, where there are interim expenditures required in order to keep the property development options “alive”. Normally
American exchange options require a numerical solution, but herein there is a new closed-form approximate solution, which
is computationally efficient and accurate. This method combines repeats of Margrabe European exchange and Geske compound option
solutions with tight upper boundaries of either American perpetuities or European exchange options with a high volatility.
Illustrations are provided of the sensitivity of the real sequential options and optimal timing to changes in several parameters,
which provide a framework for property policy (tax, subsidy and regulatory) guidelines and for property development strategy
evaluation. There are several plausible applications of these real option models in commercial and residential property development,
within commercial property leases, with regard to switching tenants, and agricultural alternatives. 相似文献