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71.
This article considers the problem of testing for latent factors or reduced rank in a broad class of (multivariate linear stationary) time-series models, wherein model errors have autocorrelation and heteroskedasticity of unknown form. It is easy to motivate these models and methods in the context of finance models, and we illustrate with a familiar macromodel of asset returns, proposed previously by Chen, Roll, and Ross. Unfortunately, previously used tests for reduced rank are not sufficiently robust, so we examine two heteroskedasticity and autocorrelation-consistent (HAC) methods, a HAC version of Hansen's GMM test and a lesser known but more user-friendly minimum-distance or ratio of asymptotic densities (RAD) test. We recommend the RAD test, for which we supply computer code. In application, the tests lend more HAC-robust support to the hypothesis that multiple factors drive the link between the macroeconomy and the returns on bonds and stocks. 相似文献
72.
Melissa Markley Rountree Robert D. O'Keefe Petr G. Chadraba 《Journal of East-West Business》2013,19(1):68-92
Global expansion of business into areas defined by different cultural and national environments creates the need for companies to better understand the impact of culture on business operations. Of particular importance is the role country of residence plays. Researchers argue that many cultural differences are malleable, capable of shifting to fit the corporate culture of an organization. However, additional research aimed at identifying different countries’ cultural values is needed. This paper presents the results of a multi-national survey of business students identifying differences in cultural perceptions of ethical behaviors. Differences in personal versus social decision making are discussed. 相似文献
73.
One of the main problems that public institutions face in the management of protected areas, such as the European Natura 2000 network, is determining how to design and implement sustainable management plans that account for the wide range of marketed and non-marketed benefits they provide to society. This paper presents an application of a stated preference valuation approach aimed at evaluating the social preferences of the population of the Basque Country, Spain, for the key attributes of a regional Natura 2000 network site. According to our results, individuals’ willingness-to-pay (WTP) is higher for attributes associated with non-use values (native tree species and biodiversity conservation) than for attributes associated with use values (agricultural development and commercial forestry). The paper concludes that management policies related to Natura 2000 network sites should account for both for the importance of non-use values and the heterogeneity of the population's preferences in order to minimize potential land use conflicts. 相似文献
74.
Christoph Schmitz Hans van Meijl Page Kyle Gerald C. Nelson Shinichiro Fujimori Angelo Gurgel Petr Havlik Edwina Heyhoe Daniel Mason d'Croz Alexander Popp Ron Sands Andrzej Tabeau Dominique van der Mensbrugghe Martin von Lampe Marshall Wise Elodie Blanc Tomoko Hasegawa Aikaterini Kavallari Hugo Valin 《Agricultural Economics》2014,45(1):69-84
Changes in agricultural land use have important implications for environmental services. Previous studies of agricultural land‐use futures have been published indicating large uncertainty due to different model assumptions and methodologies. In this article we present a first comprehensive comparison of global agro‐economic models that have harmonized drivers of population, GDP, and biophysical yields. The comparison allows us to ask two research questions: (1) How much cropland will be used under different socioeconomic and climate change scenarios? (2) How can differences in model results be explained? The comparison includes four partial and six general equilibrium models that differ in how they model land supply and amount of potentially available land. We analyze results of two different socioeconomic scenarios and three climate scenarios (one with constant climate). Most models (7 out of 10) project an increase of cropland of 10–25% by 2050 compared to 2005 (under constant climate), but one model projects a decrease. Pasture land expands in some models, which increase the treat on natural vegetation further. Across all models most of the cropland expansion takes place in South America and sub‐Saharan Africa. In general, the strongest differences in model results are related to differences in the costs of land expansion, the endogenous productivity responses, and the assumptions about potential cropland. 相似文献
75.
Hermann Lotze‐Campen Martin von Lampe Page Kyle Shinichiro Fujimori Petr Havlik Hans van Meijl Tomoko Hasegawa Alexander Popp Christoph Schmitz Andrzej Tabeau Hugo Valin Dirk Willenbockel Marshall Wise 《Agricultural Economics》2014,45(1):103-116
Integrated Assessment studies have shown that meeting ambitious greenhouse gas mitigation targets will require substantial amounts of bioenergy as part of the future energy mix. In the course of the Agricultural Model Intercomparison and Improvement Project (AgMIP), five global agro‐economic models were used to analyze a future scenario with global demand for ligno‐cellulosic bioenergy rising to about 100 ExaJoule in 2050. From this exercise a tentative conclusion can be drawn that ambitious climate change mitigation need not drive up global food prices much, if the extra land required for bioenergy production is accessible or if the feedstock, for example, from forests, does not directly compete for agricultural land. Agricultural price effects across models by the year 2050 from high bioenergy demand in an ambitious mitigation scenario appear to be much smaller (+5% average across models) than from direct climate impacts on crop yields in a high‐emission scenario (+25% average across models). However, potential future scarcities of water and nutrients, policy‐induced restrictions on agricultural land expansion, as well as potential welfare losses have not been specifically looked at in this exercise. 相似文献
76.
Sherman Robinson Hans van Meijl Dirk Willenbockel Hugo Valin Shinichiro Fujimori Toshihiko Masui Ron Sands Marshall Wise Katherine Calvin Petr Havlik Daniel Mason d'Croz Andrzej Tabeau Aikaterini Kavallari Christoph Schmitz Jan Philipp Dietrich Martin von Lampe 《Agricultural Economics》2014,45(1):21-35
This article compares the theoretical and functional specification of production in partial equilibrium (PE) and computable general equilibrium (CGE) models of the global agricultural and food system included in the AgMIP model comparison study. The two model families differ in their scope—partial versus economy‐wide—and in how they represent technology and the behavior of supply and demand in markets. The CGE models are “deep” structural models in that they explicitly solve the maximization problem of consumers and producers, assuming utility maximization and profit maximization with production/cost functions that include all factor inputs. The PE models divide into two groups on the supply side: (1) “shallow” structural models, which essentially specify area/yield supply functions with no explicit maximization behavior, and (2) “deep” structural models that provide a detailed activity‐analysis specification of technology and explicit optimizing behavior by producers. While the models vary in their specifications of technology, both within and between the PE and CGE families, we consider two stylized theoretical models to compare the behavior of crop yields and supply functions in CGE models with their behavior in shallow structural PE models. We find that the theoretical responsiveness of supply to changes in prices can be similar, depending on parameter choices that define the behavior of implicit supply functions over the domain of applicability defined by the common scenarios used in the AgMIP comparisons. In practice, however, the applied models are more complex and differ in their empirical sensitivity to variations in specification—comparability of results given parameter choices is an empirical question. To illustrate the issues, sensitivity analysis is done with one global CGE model, MAGNET, to indicate how the results vary with different specification of technical change, and how they compare with the results from PE models. 相似文献
77.
78.
Our study is the first that explicitly links rent deregulation and the choice between owning and renting (the tenure choice) using household decisions over a 1‐year period. The rent deregulation process in the Czech Republic started in 2006, two years after joining the European Union. By design, the maximum regulated rent appreciation depended explicitly on real estate prices, which accelerated the pace of deregulation due to rapidly rising prices at the time. A unique dataset enables us to track the tenure choice of households from consumption surveys for subsequent years. The proportion of households that switched from renting to owning sharply increased among renters of regulated apartments. We show that this change was caused by the deregulation process. In contrast, rent deregulation makes owners and renters paying market rent less likely to change ownership status. 相似文献
79.
80.
Jerry L. Petr 《Journal of economic issues》2013,47(2):475-483
In the 1940s and 1950s, institutionalist economists rapidly lost their influence over American economics. In parallel, a new mainstream emerged, and the institutionalists were extremely dissatisfied with the path taken by the economic science. We analyze the opinions and feelings about this context to shed light on the institutionalists’ understanding of the new mainstream economics. We construct a historical account of the institutionalists’ dissatisfaction with post-war economics based on archival material from the personal papers of Allan Gruchy, John Gambs, John Blair, and Clarence Ayres. In the period analyzed, the economists, who would later found the Association for Evolutionary Economics, acted as dissenters rather than institutionalists. In part, this explains the pluralistic path that the association has followed ever since its foundation. 相似文献