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1.
Maano Ramutsindela Sylvain Guyot Sébastien Boillat Frédéric Giraut Patrick Bottazzi 《Geopolitics》2020,25(1):240-266
ABSTRACTThe conservation enterprise is embedded in ideas of the environment through which it promotes a vision of the world and the relations between the non-human and human. The papers in this forum analyse conservation from various vantage points to draw the links between geopolitics and conservation. The authors use three themes to demonstrate these links. The first theme draws on the concept of environmentality to show the mobilization of ecological rationalities and power towards the creation of protected areas. The second pays attention to networks formed across the distance, and how they influence the location and governance of protected areas. The third focuses on the strategies the conservation lobby uses to align local identities with global conservation ideals and goals. Collectively, these themes highlight features of conservation geopolitics. 相似文献
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Mass tourism began in the Caribbean during the middle of the twentieth century. Unfortunately, increasing competition and a change in the motivation of tourists now force the authorities who manage these regions to introduce a new tourism offer that is not based directly on either the 3S (Sun, Sand, and Sea) or 3E (Entertainment, Excitement, Education) model. Hiking, trekking, and climbing, defined as mountaineering, might be one of these. This paper examines the potential for mountaineering in Cuba by verifying its accessibility for tourists. The assessment is based on a framework of true accessibility, which consists of two factors: (1) destination accessibility and (2) real access. Our results show that mountaineering in Cuba should be considered to be one of the key contributors to the development, prosperity, and well-being of all stakeholders, and especially for the communities outside the tourism enclaves. 相似文献
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This work explores and compares some basic properties of corporate growth process at both aggregate manufacturing level and
disaggregated sectoral levels. Using an extensive dataset on Italian manufacturing firms, we investigate which properties
of firm growth dynamics are robust under disaggregation. We compare the results obtained with three different definitions
of firm size, namely total sales, number of employees and value added. Our analysis suggests that while different sectors
are characterized by significant differences in firm size distributions, in the degrees of concentration and in the autoregressive
structure of the growth processes, there are also regularities which hold across all of them, such as the approximate unit
root nature of the growth process and the power exponential shape of the growth rates density. Together, these “stylized facts”
suggest challenging puzzles on the drivers of corporate growth and the resulting industrial structures. 相似文献
6.
This paper examines the effects of the institutional environment on West African cotton farmers’ technical efficiency (TE). First, key aspects of the cotton sector institutional environment are discussed, including input and credit access, and producers’ organisations. Then, a stochastic frontier production function, which incorporates technical inefficiency effects, is applied to farm level data collected in Benin, Burkina Faso and Mali. The survey includes farmers’ evaluations of the cotton sector institutional environment. Results suggest that institutional level features influence producers’ TE, besides farm‐level characteristics. Cotton growers who report a negative experience with the joint liability programme, who identify the cotton price mechanism or access to credit as the main constraints to performance, and who cultivate more hectares of cereals are technically more inefficient in producing cotton. Findings suggest that cotton farmers in Mali are less technically efficient in producing cotton than in Burkina Faso and Benin. Agricultural development policies focusing on reducing farmers’ financial stress, particularly through the establishment of adequate price mechanisms (i.e. higher farm‐gate prices and timely payments to farmers) and improvement in the input–credit markets should be encouraged to improve TE in West Africa. 相似文献
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African agricultural production is modeled as a sequential decision process, with men's labor first allotted to clearing, then women's labor allotted to harvesting. A switching regression is then used to measure the constraints due to clearing labor capacity and harvesting labor capacity. The import of men's clearing labor depends on the valuation of shadow wages. Output appears to be more frequently constrained by husband's clearing labor, and in this situation male labor appears under‐utilized. However, output is also significantly constrained by female harvest labor, although the findings imply that female labor is over‐utilized at this stage. 相似文献
9.
Mansano Rafael Esteves Allem Luiz Emilio Del-Vecchio Renata Raposo Hoppen Carlos 《Quality and Quantity》2022,56(4):2325-2340
Quality & Quantity - A portfolio associated with a balanced signed graph that contains both positive and negative edges is more predictable and risk-averse, and is therefore likely to require... 相似文献
10.
We investigate market selection and bet pricing in a repeated prediction market model. We derive the conditions for long-run survival of more than one agent (the crowd) and quantify the information content of prevailing prices in the case of fractional Kelly traders with heterogeneous beliefs. It turns out that, apart some non-generic situations, prices do not converge, neither almost surely nor on average, to true probabilities, nor are they always nearer to the truth than the beliefs of all surviving agents. This implies that, in general, prediction market prices are not maximum likelihood estimators of the true probabilities. However, when more than one agent survives, the average price emerging from a prediction market approximates the true probability with lower information loss than any individual belief. 相似文献