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981.
This article presents the results of an empirical study that investigated coordination and control within multinational companies over six key aspects of their environmental strategy. Specifically, it first examines the level of centralization of these key issues. Second, it investigates whether there is a positive relation between three variables associated with organizational complexity and the level of centralization of the environmental issues. Statistical analyses of the data obtained from a sample of 98 North American multinationals were conducted. The study's results revealed that most companies have adopted a global environmental standard to govern their worldwide business activities that is supported by strong central controls over both environmental performance evaluation of facilities and decisions regarding the development of environmental programs. Results also revealed that there are limited links between organizational complexity and most aspects of the environmental strategy. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment. 相似文献
982.
Alfonso Flores‐Lagunes William C. Horrace Kurt E. Schnier 《Journal of Applied Econometrics》2007,22(4):729-745
Stochastic frontier models are often employed to estimate fishing vessel technical efficiency. Under certain assumptions, these models yield efficiency measures that are means of truncated normal distributions. We argue that these measures are flawed, and use the results of Horrace ( 2005 ) to estimate efficiency for 39 vessels in the Northeast Atlantic herring fleet, based on each vessel's probability of being efficient. We develop a subset selection technique to identify groups of efficient vessels at pre‐specified probability levels. When homogeneous production is assumed, inferential inconsistencies exist between our methods and the methods of ranking the means of the technical inefficiency distributions for each vessel. When production is allowed to be heterogeneous, these inconsistencies are mitigated. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
983.
We examined the ability of the health‐belief model to predict individuals’ dietary quality and body mass among a nationwide sample of 1319 adults in the United States. Simultaneous estimation of the structural equation model found acceptable goodness‐of‐fit to the data. Explained variance in dietary quality and body mass, however, were moderate to weak. The model included three types of nutrition knowledge: basic facts, diet–health awareness and ability to accurately self‐assess nutrient intake. None of these variables had a strong effect on dietary quality or body mass. We speculate that lifestyle characteristics, cultural habits, community infrastructure, and the politics of food production and retailing – variables found in other studies to affect dietary quality and body mass yet not available in our data – might outweigh the effects of nutrition knowledge and sociodemographic factors on estimating dietary quality and body mass. We suggest that future research and intervention programmes focus more on social, cultural and political context than on nutrition knowledge. Current collaborations among life and social scientists to design foods to improve human nutrition might also prove effective in reducing the prevalence of overweight and obesity. 相似文献
984.
The aim of this paper is to explore the relationship between income inequality and health in the European Union countries using new data from the European Community Household Panel (ECHP). The heterogeneity of the households has been approached using different equivalence scales. A variety of different model specifications were tried using different dependent variables such as life expectancy at birth and child mortality. The results give support to the influence of income inequality on health indicators using aggregate data and panel techniques, and show the sensitivity of the Gini index to the equivalence scale considered. 相似文献
985.
It is very important that e‐commerce practitioners leverage the technological power (e.g., information control) of the Internet in order to provide consumers with the information they need to make purchasing decisions. In this study, it is hypothesized that, to improve decision‐making quality, the degree of information control should be matched to the degree of expertise of consumers. The experiment method was used to test the hypothesis, and 120 student subjects voluntarily participated in the experiment. The empirical results of the study show that experts perform better at decision making in high‐information conditions, whereas novices perform better in low‐control conditions. The results of this research strongly support the match hypothesis of information control. © 2006 Wiley Periodicals, Inc. 相似文献
986.
Abstract: This paper tests Friedman's hypothesis that increased variability in the growth of money supply causes velocity to decline, using Egyptian data from the period 1960–99. The monetary aggregates M1 and M2 are decomposed into anticipated and unanticipated components and the variability of money growth is computed as the standard deviation of five years of monetary growth rates. Cointegration tests show that there is a statistically significant long‐run relationship between the variability in money growth and velocity, for both M1 and M2. However, while increased variability in the growth of M2 is found to be associated with lower velocity — supporting Friedman's velocity hypothesis — increased variability in the growth of M1 seems to have no influence on velocity, possibly because the definition of M1 has changed over time. The findings also suggest that anticipated movements in M2 volatility are not neutral, in the sense that they do affect velocity. An important implication is that the scope for discretionary monetary policy in Egypt is somewhat circumscribed in the short run. However, if the Central Bank of Egypt were to make its decisions more transparent and pre‐announce its policies, then velocity would be more predictable and monetary policy more potent. 相似文献
987.
Egnonto M. Koffi‐Tessio 《Revue africaine de developpement》2004,16(1):53-71
Résumé: Au Togo, la production alimentaire est en baisse continue et l’état de l’environnement est marqué entre autres par la dégradation des ressources naturelles. La présente étude vise àévaluer la contribution des facteurs environnementaux à la croissance alimentaire. L’hypothèse fondamentale est que la croissance alimentaire au Togo est moins liée aux aléas climatiques qu’aux investissements en capital physique et humain. L’étude aboutit à la conclusion que la variable environnementale n’est pas déterminante dans l’explication de la variation de la production alimentaire ce qui confirme notre hypothèse initiale. En conséquence, les politiques de production alimentaire futures au Togo ne doivent pas privilégier les variables du capital physique au détriement de la variable environnementale. Il convient donc de rechercher à l’avenir la combinaison optimale des facteurs du capital physique et du capital humain et de l’environnement qui garantisse de manière durable la production alimentaire dans le cadre de la formulation de la politique de sécurité alimentaire au Togo. 相似文献
988.
This paper shows that, in the 2 × 3 sector‐specific capital Harris–Todaro model, capital growth owing to either domestic or foreign investment always enhances the welfare of the country (i.e. non‐immiserizing), and this result of non‐immiserizing foreign investment holds regardless of initial holdings of foreign capital; the policy of industrial targeting via capital investment is more effective vis‐à‐vis the (neoclassical) 2 × 2 mobile‐capital Harris–Todaro model or the Heckscher–Ohlin model; in contrast to the recent generalization by Marjit and Beladi (2003 ), capital growth cannot be immiserizing in the present model, even if it destroys the “envelope theorem.” 相似文献
989.
Modeling Cyclical Asymmetries in GDP: International Evidence 总被引:1,自引:0,他引:1
This paper models asymmetric behavior in GDP growth in the USA, Germany, France, and Japan. It develops smooth transition autoregressive models and interprets nonlinear dynamics in terms of cyclical asymmetries. A procedure for defining data-based, qualitative cyclical regimes from the estimated models is proposed, and generalized impulse response functions are computed to assess to what extent the response to a shock changes over different phases of the cycle. 相似文献
990.
This paper examines the diffusion pattern of mobile telephony in Colombia. The empirical modelling approach adopted in the paper starts off by choosing between the two functional forms that are most frequently used in the literature, namely the Gompertz and the Logistic models. After applying a formal statistical test to choose the preferred functional form, the evidence suggests that the pattern of diffusion can be best characterised as following a Logistic model. The findings also suggest that despite the fact that in recent years the rate of growth of mobile phone subscribers has started to slow down, there still appears to be room for further expansion as the saturation level is expected to be reached in 2013. The estimated saturation level is consistent with some individuals possessing more than one mobile device. 相似文献