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51.
This paper considers finite sample motivated structural change tests in the multivariate linear regression model with application to energy demand models, in which case commonly used structural change tests remain asymptotic. As in Dufour and Kiviet [1996. Exact tests for structural change in first-order dynamic models. Journal of Econometrics 70, 39–68], we account for intervening nuisance parameters through a two-stage maximized Monte Carlo test procedure. Our contributions can be classified into five categories: (i) we extend tests for which a finite-sample theory has been supplied for Gaussian distributions to the non-Gaussian context; (ii) we show that Bai et al. [1998. Testing and dating common breaks in multi-variate time series. The Review of Economic Studies 65 (3), 395–432] test severely over-rejects and propose exact variants of this test; (iii) we consider predictive break test approaches which generalize tests in Dufour [1980. Dummy variables and predictive tests for structural change. Economics Letters 6, 241–247] and Dufour and Kiviet [1996. Exact tests for structural change in first-order dynamic models. Journal of Econometrics 70, 39–68]; (iv) we propose exact (non-Bonferonni based) extensions of the multivariate outliers test from Wilks [1963. Multivariate statistical outliers. Sankhya Series A 25, 407–426] to models with covariates; (v) we apply these tests to the energy demand system analyzed by Arsenault et al. [1995. A total energy demand model of Québec: forecasting properties. Energy Economics 17 (2), 163–171]. For two out of the six industrial sectors analyzed over the 1962–2000 period, break and further goodness-of-fit and diagnostic tests allow to identify (and correct) specification problems arising from historical regulatory changes or (possibly random) industry-specific effects. The procedures we propose have potential useful applications in statistics, econometrics and finance (e.g. event studies). 相似文献
52.
53.
This empirical note extends the recent work by Holmes (2006) in examining the long-run relationship between private and public
savings in the U.S. over the post-World War II period. Standard Engle-Granger cointegration tests fail to reject the null
hypothesis of no cointegration; however, once allowance is made for an endogenous break in the cointegrating relationship,
the weak form of the Ricardian equivalence proposition is supported. 相似文献
54.
Kurt Lewin and the Planned Approach to Change: A Re-appraisal 总被引:3,自引:0,他引:3
Bernard Burnes 《Journal of Management Studies》2004,41(6):977-1002
abstract The work of Kurt Lewin dominated the theory and practice of change management for over 40 years. However, in the past 20 years, Lewin's approach to change, particularly the 3-Step model, has attracted major criticisms. The key ones are that his work: assumed organizations operate in a stable state; was only suitable for small-scale change projects; ignored organizational power and politics; and was top-down and management-driven. This article seeks to re-appraise Lewin's work and challenge the validity of these views. It begins by describing Lewin's background and beliefs, especially his commitment to resolving social conflict. The article then moves on to examine the main elements of his Planned approach to change: Field Theory; Group Dynamics; Action Research; and the 3-Step model. This is followed by a brief summary of the major developments in the field of organizational change since Lewin's death which, in turn, leads to an examination of the main criticisms levelled at Lewin's work. The article concludes by arguing that rather than being outdated or redundant, Lewin's approach is still relevant to the modern world. 相似文献
55.
Injection drug users (IDUs) transmit the human immunodeficiency virus (HIV) via both needle sharing and sex. Available interventions for this population have varying costs and effectiveness and focus on different risk behaviors. In this analysis, we look at two interventions. One is inexpensive, broad-based and provides modest risk reductions (street outreach (SO)); the other is narrowly focused, expensive and relatively effective (methadone maintenance). This analysis explores the effects of population risk behavior, intervention effectiveness, intervention costs, and decision constraints when allocating funds between these two interventions to maximize effectiveness. We develop a model of the spread of HIV, dividing IDUs into susceptibles (uninfected) and infectives, and separately portraying sex and injection risk. We simulate the epidemic in New York City for time periods from the mid-1980s to the early 1990s, and incorporate the behavioral effects of two interventions performed singly or in combination to find the allocation that maximizes the number of infections averted in the IDUs and their noninjecting sex partners, assuming interventions have increasing marginal costs. We find that the optimal allocation nearly always involves spending the maximum allowable amount on SO. This result is largely insensitive to variations in risk parameters, intervention efficacy, or cost. The model's structure, however, makes clear that many factors contribute to this insensitivity, namely the scope of the interventions, the dual drug/sex nature of HIV risk in the population, the asymmetry of sexual risk for men and women, and the potential benefits to nonIDUs. 相似文献
56.
The Self-concept of Black and White Women: The Influences Upon Its Formation of Welfare Dependency, Work Effort, Family Networks, and Illnesses 总被引:1,自引:0,他引:1
Abstract . The concept of “self-efficacy” is used to test the hypothesis that the negative self-concept of welfare recipients coniributes to long term psychological and material dependency on such assistance. Self-efficacy focuses on the extent to which people are able to produce and regulate events in their lives and is associated with self-imposed performance expectations. The extent to which the minority status which Blacks occupy in this society decreases self efficacy relative to Whites is examined, using information generated from structured interviews with 290 low income Black and White women. Operationalizing the concept of self-efficacy with appropriate controls for socioeconomic status, family composition and other factors results in finding no racial differences in sense of self-efficacy between Black and White women. Observed differences in patterns of receipt of public assistance are found to be more directly related to the persistence of structural barriers to upward mobility that have differential impacts on Blacks and Whites. Long term receipt of public assistance is found to adversely affect both self-worth and work orientation/perceived efficacy for all women. 相似文献
57.
Sickness Presenteeism, Sickness Absenteeism, and Health Following Restructuring in a Public Service Organization 总被引:1,自引:0,他引:1
Natasha Caverley J. Barton Cunningham James N. MacGregor 《Journal of Management Studies》2007,44(2):304-319
abstract This study examined the relationship between sickness presenteeism, sickness absenteeism, organizational outcomes and employee health. In particular, we wanted to investigate to what degree employees were substituting sickness presence for sickness absence. Three hypotheses were tested to formalize this 'substitution proposition'. We surveyed a Canadian public service organization which was involved in a large scale downsizing initiative. For this study, 237 Personnel Corporation (pseudonym used) employees responded to the survey, representing a 66 per cent response rate. Survey results indicated that, while the workforce was of average health, sickness absenteeism was less than half that of the national average. The difference could be accounted for by sickness presenteeism – the average number of days employees attended work while ill or injured was greater than the number of days of sickness absence. The pattern of results supported the notion that employees were substituting presenteeism for absenteeism. The frequency and type of self-reported health problems were highly similar for presenteeism and absenteeism. Work factors (e.g. job security, supervisor support and job satisfaction) tested were significantly correlated with presenteeism. Presenteeism appears to be a stronger predictor of health than absenteeism, suggesting that efforts to improve workplace health may have a more immediate impact on presenteeism than on absenteeism. 相似文献
58.
Ajay Menon Bernard J. Jaworski Ajay K. Kohli 《Journal of the Academy of Marketing Science》1997,25(3):187-200
The authors examine the role of organizational factors affecting interdepartmental interactions and their subsequent effects
on product quality. Results from a national study suggest that product quality is affected by interdepartmental conflict and
connectedness. Importantly, the linkage between interdepartmental conflict and product quality appears to be robust across
varying levels of market turbulence and technological turbulence. In contrast, interdepartmental connectedness appears to
be more important for product quality under conditions of high market and technological turbulence. The results also indicate
that interdepartmental interactions are influenced by leadership characteristics (risk aversion of top managers), reward system
orientation, and organization structure (centralization, departmentalization, and hierarchical levels). Managerial implications
and directions for future work are proposed.
His research interests focus on marketing strategy, marketing management, and new product management. His work has appeared
in theJournal of Marketing, Journal of Business Research, and other journals.
His research focuses on implementing and controlling marketing, market/environmental orientation, and customer responses to
advertising. His work has appeared in theJournal of Marketing, Journal of Marketing Research, Review of Marketing, and other journals.
His research interests include market orientation, marketing strategy, sales management, and industrial marketing. His work
has appeared in a number of journals including theJournal of Marketing, Journal of Marketing Research, andStrategic Management Journal. 相似文献
59.
Relationships in business markets: Exchange episodes,value creation,and their empirical assessment 总被引:1,自引:0,他引:1
James C. Anderson 《Journal of the Academy of Marketing Science》1995,23(4):346-350
Conclusion David Wilson (1995) has provided us with much grist for thought with his integrated framework for customer-supplier relationship
development. In focusing on which constructs are “active” and therefore most meaningful at each stage, he has opened a new
vista for research in this area. Our models and empirical research ought to reflect this, but to date they largely have not.
I have suggested qualitative, longitudinal research as a preferred next step in gaining the knowledge that we will need to
make field-survey, longitudinal research worthwhile.
Wilson also is to be lauded for drawing greater attention to value creation as a central undertaking in customer-supplier
relationships. Understanding and actualizing value creation (and value sharing) are critical aspects of the market-sensing
and customer-linking capabilities in market-driven organizations (Day 1994), yet the mechanisms underlying them and the methodologies
for accurately assessing them remain largely unknown. Here, particularly for tool development research, it would seem to be
an opportune time for business marketing academics and practitioners to form their own collaborative relationships for mutual
gain.
His research interests are in working relationships between firms in business markets and measurement techniques. His articles
have appeared inHarvard Business Review, Journal of Marketing, Journal of Marketing Research, Management Science, Psychological Bulletin, andPsychometrika, among others. He has been vice president of the Business Marketing Division of the American Marketing Association and is
a fellow of the American Psychological Association. 相似文献
60.
An empirical test of trust-building processes and outcomes in sales manager-salesperson relationships 总被引:1,自引:0,他引:1
Thomas G. Brashear James S. Boles Danny N. Bellenger Charles M. Brooks 《Journal of the Academy of Marketing Science》2003,31(2):189-200
This study examines three trust-building processes and outcomes in sales manager-salesperson relationships. This study, based
on a sample of more than 400 business-to-business salespeoples from a variety of industries, shows two trust-building processes
(predictive and identification) to be significantly related to salesperson trust in the sales manager. Interpersonal trust
was found to be most strongly related to shared values and respect. Trust was directly related to job satisfaction and relationalism,
and indirectly related to organizational commitment and turnover intention.
Thomas G. Brashear (brashear@mktg.umass.edu) (Ph.D., Georgia State University) is an assistant professor of marketing in the Isenberg School
of Management at the University of Massachusetts-Amherst.
James S. Boles (jboles@gsu.edu) (Ph.D., Louisiana State University) is an associate professor of marketing in the Robinson College of Business
at Georgia State University. His research has appeared in a variety of journals, including theJournal of Marketing, theJournal of Business Research, theJournal of the Academy of Marketing Science, theJournal of Retailing, theJournal of Personal Selling and Sales Management, and theJournal of Applied Psychology. His areas of research interest include personal selling, sales management, key and strategic account management, and business
relationships.
Danny N. Bellenger (mktdnb@langate.gsu.edu) (Ph.D., University of Alabama) is currently chairman of the Marketing Department in the Robinson
College of Business at Georgia State University. His research has appeared in a number of academic journals including theJournal of Marketing Research, theJournal of Marketing, theJournal of Advertising Research, theCalifornia Management Review, theJournal of Retailing, theJournal of Personal Selling and Sales Management, Industrial Marketing Management, and theJournal of Business Research. He has authored four monographs and four textbooks on marketing research, sales, and retailing.
Charles M. Brooks (brooks@quinnipiac.edu) (Ph.D., Georgia State University) is an associate professor and chair of the Department of Marketing
and Advertising at Quinnipiac University. His research has appeared in theJournal of Business Research, theJournal of Retailing, Marketing Theory, and theJournal of Marketing Theory and Practice. 相似文献