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41.
Klaske N. Veth Hubert P. L. M. Korzilius Beatrice I. J. M. Van der Heijden Ben J. M. Emans Annet H. De Lange 《International Journal of Human Resource Management》2013,24(19):2777-2808
AbstractBased on the social exchange theory and on ageing and life-span theories, this paper aims to examine: (1) the relationships between perceived availability and use of HRM practices, and employee outcomes (i.e. work engagement and employability); and (2) how employee age moderates these relationships. Using a sample of Nmaximum = 1589 employees, correlational analyses and multiple hierarchical regression analyses were conducted. First, confirming our hypotheses, results showed predominantly positive relationships between work engagement and both perceived availability and use of development HRM practices, such as HRM practices related to learning, development, and incorporating new tasks. The study outcomes opposed, however, our hypotheses with predominantly negative relationships between work engagement and perceived availability and use of maintenance HRM practices. Predominantly positive relationships were furthermore found, as was hypothesized, between employability and perceived availability and use of development as well as maintenance HRM practices. Generally speaking, these results were not more pronounced for any of the age groups. That is, age appeared to not play any significant moderating role. Research limitations, implications for practice and directions for future work are also discussed. 相似文献
42.
Kelvin Mulungu Zewdu Ayalew Abro Wambui Beatrice Muriithi Menale Kassie Miachael Kidoido Subramanian Sevgan Samira Mohamed Chrysantus Tanga Fathiya Khamis 《Journal of Agricultural Economics》2024,75(1):261-279
Most previous studies evaluating agricultural technology adoption focus on estimating homogeneous average treatment effects across technology adopters. Understanding the heterogeneous effects and drivers of impact heterogeneity should enable interventions to be better targeted to maximise benefits. We apply machine learning using data from a randomised controlled trial to estimate the heterogeneous treatment effect of fruit fly IPM practices (i.e., parasitoids, orchard sanitation, use of food bait, biopesticides, male annihilation technique, and their combinations) in Central Kenya. Results suggest significant heterogeneity in the effect of IPM practices conditioned on household characteristics. The most important covariates explaining differences in treatment effects are wealth, distance to the mango fruit market, age of the household head, labour and experience in mango farming. Results further indicate that those with fewer mango trees benefit more from most IPM practices. Additional analysis across other covariates shows mixed results but generally suggests significant differences between households benefiting the most and those benefiting the least from IPM practices. 相似文献
43.
Daniel Ammann Angelika Hilbeck Beatrice Lanzrein Philipp Hübner Bernadette Oehen 《Journal of Risk Research》2013,16(4):487-501
In order to fulfil their responsibilities under the precautionary principle, biosafety commissions should lay down guidelines concerning the understanding and application of this principle and work towards an operational procedure. With this contribution, we propose a step‐wise procedure that aims to establish the understanding of the precautionary principle within biosafety commissions and to provide a methodological approach for the application of this principle to specific cases in the course of risk assessment. This approach is based on systematically investigating the consensus view within a group of 15 biosafety experts with the help of sets of checklists. For step 1, we propose a checklist of 13 criteria aimed at defining the understanding of the precautionary principle. For step 2, we propose 4 criteria for the decision on whether or not to use the precautionary principle. For step 3, 11 criteria for the use of the precautionary principle are presented. In step 4, additional criteria for specific applications could be included. In step 5, possible recommendations to decision‐making authorities are proposed. 相似文献
44.
ABSTRACTA quantitative turn in history of economic thought is looming. We argue that engineering it consciously is of crucial importance for historians of economics. We also highlight the limitations of quantitative techniques. Yet, the combination of qualitative and quantitative research could substantially enrich our narratives of the development of economics and its practice, of how ideas and tools disseminate and influence other spheres. A failed quantitative turn could lead our field to a house divided and, in the worst case, a civil war. 相似文献
45.
Efficiency in wine grape production: comparing long‐established and newly developed regions of South Africa 下载免费PDF全文
Efficiency, partly based on technology, is central to international competitiveness. This article applies a stochastic frontier inefficiency model to a panel of 77 wine grape farms in South Africa between 2005 and 2015 and allows the comparison of efficiency levels for the old established wine regions with those of newer entrants. Thus, we investigate whether experience plus first choice of location matters more than the follower's advantage of newer technology. In all regions, a greater share of permanent labor and increased supervision raised efficiency, while more inorganic fertilizer and less irrigation has the opposite effect. Innovations in trellising had insignificant effects (except in the old regions) but not replacing old vines reduced efficiency. However, a higher proportion of red varietals also lowered efficiency in the old regions due to a fall in the price of red wine as these farmers continued to concentrate on quality reds. The new regions compensated for falling prices by increasing crop size with irrigation and fertilizer and extending the area planted, but with less concern for quality. This appears to be more successful in efficiency terms, but as international demand for quality wine increases it may be a poor long‐term strategy. 相似文献
46.
Beatrice Conradie Jenifer Piesse Colin Thirtle Nick Vink 《Journal of Agricultural Economics》2018,69(3):815-832
In 2013 the minimum agricultural wage in South Africa was increased by an unprecedented 51%. We use data on 77 Western Cape Province wine grape farms from 2005–2015 to estimate the impacts on employment. Previous post‐apartheid labour market reforms increased minimum wages substantially, but re‐entry to global markets after sanctions were lifted increased demand and this preserved jobs in the wine sector. However, by 2005 this demand growth had largely ceased. The long‐run wage elasticity for permanent employees was found to be ?0.4, but for casual workers the figure was ?4.7, so the 51% wage increase is likely to decimate casual employment in the future. Thus, the poorest and most vulnerable casual workers lose most in terms of jobs, incomes and secure livelihoods, whereas 80% of full‐time staff benefit from the higher minimum wages. Thus, the minimum wage change is likely to increase the gap between privileged permanent staff and casual workers. This result is not surprising in view of the long‐standing interdependence between farmers and their permanent workers in wine grape production. 相似文献
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48.
Multisource Ratings Of Managerial Competencies And Their Predictive Value For Managerial And Organizational Effectiveness 下载免费PDF全文
This study examined the predictive value of multisource ratings of managerial competencies for managerial and organizational effectiveness. Data from 155 subordinates, 59 peers, and 28 supervisors were gathered in order to provide insight into their perceptions on managerial competencies for their managers. With regard to the outcome variable (i.e., effectiveness), both individual‐level (subordinates’, peers’, and supervisors’ ratings of managers) and organizational‐level (Balanced Scorecard) measures were used. As expected, subordinates, peers, and supervisors have distinct perspectives on the managerial competencies that are relevant for effectiveness. Moreover, the specific managerial competencies differ in terms of their predictive validity respectively for managerial and organizational effectiveness. The outcomes of our study suggest that a multisource and multimethod approach is valuable in assessing both managerial competencies and managerial and organizational effectiveness. Several implications for human resource management practices are discussed. © 2014 Wiley Periodicals, Inc. 相似文献
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50.
Beatrice Scheubel Daniel Schunk Joachim Winter 《The Scandinavian journal of economics》2013,115(2):549-574
The responses given in opinion polls on future policy reforms reflect both subjective expectations and preferences. We disentangle these factors using data from a controlled survey experiment conducted in Germany. At the time of the experiment, an increased retirement age had been proposed as part of a pension reform. Thus, the survey respondents faced an incentive to give biased responses. By understating their expected work ability at the age of retirement, they could make the increase of the retirement age a less attractive policy option. We find evidence for such strategic response behavior, and this strategic bias appears to be stronger in former communist East Germany. 相似文献