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931.
Estimation in the interval censoring model is considered. A class of smooth functionals is introduced, of which the mean is an example. The asymptotic information lower bound for such functionals can be represented as an inner product of two functions. In case 1, i.e. one observation time per unobservable event time, both functions can be given explicitly. We mainly consider case 2, with two observation times for each unobservable event time, in the situation that the observation times can not become arbitrarily close to each other. For case 2, one of the functions in the inner product can only be given implicitly as solution to a Fredholm integral equation. We study properties of this solution and, in a sequel to this paper, prove that the nonparametric maximum likelihood estimator of the functional asymptotically reaches the information lower bound. 相似文献
932.
933.
934.
In this article we compare bivariate and multivariate models for homogamy of social origin and education to test whether bivariate models of homogamy lead to biased results. We use data on Hungarian couples married between 1930 and 1979 and loglinear models of scaled association. The results indicate some differences between bivariate and multivariate analyses. At each point of time bivariate models overestimate homogamy, both with respect to education and social origin. However, results on trends in time do not differ much between the two analyses. The exception is the period 1940–1959, in which bivariate analysis showed decreasing educational homogamy, and multivariate analysis showed an increasing trend. The latter finding can be explained by declining homogamy of social origin, as well as the weaker reproduction and cross-effects in this period. 相似文献
935.
Daniel R. Denison Jane E. Dutton Joel A. Kahn Stuart L. Hart 《Journal of Management Studies》1996,33(4):453-474
This paper explores the relationship between organizational context and the interpretation of strategic issues by examining the hypothesis that CEOs' interpretations of foreign investment in the USA are influenced by the organizational context in which they are embedded. Three aspects of organizational context - the global business experience of the firm; the firm's level of organizational inertia (as represented by firm age and size); and the resources available for responding - are examined as predictors of CEOs' perceptions of foreign investment as a threat or an opportunity. Analysis of data from 320 organizations, controlled by industry, shows that global business experience, firm size, and perceived capability are significant predictors of the perception of threat and opportunity. the discussion addresses the implications of these findings for future research on issue interpretation and organizational context. 相似文献
936.
Following Fehr and G?echter (Am Econ Rev 90(4):980–994, 2000), a large and growing number of experiments show that public goods can be provided at high levels when mutual monitoring and costly punishment are allowed. Nearly all experiments, however, study monitoring and punishment in a complete network where all subjects can monitor and punish each other. The architecture of social networks becomes important when subjects can only monitor and punish the other subjects to whom they are connected by the network. We study several incomplete networks and find that they give rise to their own distinctive patterns of behavior. Nevertheless, a number of simple, yet fundamental, properties in graph theory allow us to interpret the variation in the patterns of behavior that arise in the laboratory and to explain the impact of network architecture on the efficiency and dynamics of the experimental outcomes. 相似文献
937.
Christopher R. Reutzel Carrie A. Belsito 《The International Entrepreneurship and Management Journal》2012,8(1):1-14
Integrating signaling theory with insights derived from the attention based view, this study addresses the question of which
types of upper echelons ties initial public offering (IPO) markets value more. Specifically, we argue that the signals conveyed
by upper echelons ties with publicly traded firms are perceived by IPO equity markets as more valuable than upper echelons
ties with privately held firms. Additionally, we contend that the signals sent by external directorates with publicly traded
firms are perceived more favorably by IPO equity markets than managerial ties with publicly traded firms. The theory in this
study is tested on a sample of 366 firms than underwent their IPOs during 1997. The results of hypothesis tests provide partial
support for our arguments. 相似文献
938.
H. Kristl Davison Catherine C. Maraist R. H. Hamilton Mark N. Bing 《Employee Responsibilities and Rights Journal》2012,24(1):1-21
Organizations are increasingly relying on Internet searches and social networking websites to uncover detailed and private
information about job applicants. Such Internet screening techniques have the potential to provide additional information
beyond that found using traditional screening approaches. However, questions regarding the legality and appropriateness of
this practice, as well as issues regarding the standardization, reliability, and validity of the information obtained, need
to be addressed. The current work describes these issues associated with Internet screening and provides recommendations to
help ensure this practice is used appropriately in organizations. Suggestions for future research on Internet screening are
also discussed. 相似文献
939.
While quality control on multivariate and serially correlated processes has attracted research attentions, a number of very
detailed problems need to be overcome in order to construct practical control charts. We suggest guidelines for construction
of control charts based on vector autoregressive (VAR) residuals. We discuss why VAR model is reasonable for real processes
in nature, the use of VAR models to approximate multivariate serially correlated processes, residual estimation, selecting
the number of variables, and selecting appropriate orders, among other issues. In addition, we illustrate an example employing
VAR techniques to approximate a multivariate process previously examined and construct a control chart to monitor residuals.
Last, we illustrate the potential development and use of the VAR residual chart to assist quality control and improvement. 相似文献
940.
Faraz Alireza Kazemzadeh R. B. Moghadam M. B. Parsian Ahmad 《Quality and Quantity》2012,46(4):1323-1336
Faraz and Parsian (Stat Pap 47:569–593, 2006) have shown that the double warning lines (DWL) scheme detects process shifts more quickly than the other variable ratio
sampling schemes such as variable sample sizes (VSS), variable sampling intervals (VSI) and variable sample sizes and sampling
intervals (VSSVSI). In this paper, the DWL T2 control chart for monitoring the process mean vector is economically designed. The cost model proposed by Costa and Rahim
(J Appl Stat 28:875–885, 2001) is used here and is minimized through a genetic algorithm (GA) approach. Then the effects of the model parameters on the
chart parameters and resulting operating loss is studied and finally a comparison between all possible variable ratio sampling
(VRS) schemes are made to choose the best option economically. 相似文献