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71.
Environmental and socio-economic sustainability of chinampas (raised beds) in Xochimilco,Mexico City
Yair Merlín-Uribe Carlos E. González-Esquivel Armando Contreras-Hernández Luis Zambrano Patricia Moreno-Casasola 《国际农业可持续发展杂志》2013,11(3):216-233
The chinampas (raised beds) of Xochimilco, Mexico City, are highly productive, traditional wetland agricultural systems, which were able to feed most of the population in pre-hispanic times. There is a strong trend to substitute chinampas with plastic greenhouses for flower production, which creates negative impacts in the landscape, environment and culture. This study compares the environmental and socio-economic sustainability of chinampas and greenhouses, at both the farm and regional levels, using the MESMIS framework. Even though the results show that greenhouses are more profitable, the contribution of chinampas to ecosystem services cannot be substituted by greenhouses, as tree cover is lost, canals are filled and food is not provided. Greenhouses had a higher diversity, but also a higher agrochemical use and are heavily dependent on external inputs and subsidies. Chinampas have shifted from staple crops to commercial horticulture in order to remain a technically viable and economically feasible option for local farmers. However, compensation mechanisms for the provision of ecosystem services are urgently needed if this ancient system is to be maintained. The framework allowed the integration of indicators at both farm and regional scales, combining on-farm surveys with GIS techniques, which could assist in ecosystem service valuation. 相似文献
72.
Jose Luis Arquero Montano Jose Antonio Donoso Trevor Hassall John Joyce 《Accounting Education: An International Journal》2013,22(3):299-313
The increasingly dynamic environment in which accountants work has necessitated a reorientation of accounting education. In some countries this issue has raised great interest amongst accounting educators and practitioners. The ongoing debate has already resulted in the publication of several statements and research papers that have raised the question of the relevance of the role of vocational skills in accounting education. Examples of these vocational skills are communication skills, interpersonal skills, and problem-solving skills. This paper reports on the importance that the employers of management accountants gave to a specified set of vocational skills and capabilities and the level of ability of these skills exhibited by students. In order to prioritize future developments an integrated analysis of the two attributes, importance and exhibited level, is enabled by the use of strategic mapping. The results of this study suggest that the employers perceive deficiencies in several capabilities that they have identified as being quite important. These deficiencies exist, in the employers' opinion, both prior to recruitment and on professional qualification. The research also indicates that, in the opinion of these employers, the development of these skills should be a central concern for universities and professional bodies. The employers also indicated that vocational skills should be attained in an integrated way. 相似文献
73.
74.
Throughout much of mankind's experience with elections, vote brokers – local elites who direct the voting decisions of a subset of the electorate – have been able to make or break political careers. In various polities, brokers have thrived in spite of the secret ballot, a surprising outcome given that vote secrecy would ostensibly allow citizens to pocket the inducements offered by such individuals and vote their consciences anyway. To address this puzzle, we develop a framework for understanding the persistence and demise of vote brokerage under the secret ballot. In our model, a broker contracts with voters using an outcome contingent contract: some fixed benefit is promised to all voters sharing one of several observable profiles should the broker's candidate win the election. Using this framework, we demonstrate that the existence of brokerage depends on the size of the electorate contained within the jurisdiction controlled by the broker, with large jurisdiction sizes tending to drive brokerage out of existence. Moreover, we detail the manner in which the strategies employed by brokers depend on their economic power, the size of social groups, and ideological polarization. Empirical evidence from Minas Gerais, Brazil is used to evaluate the performance of the model. 相似文献
75.
Luis A. Gil-Alana 《Empirical Economics》2010,38(2):471-501
This paper deals with the analysis of seasonally, fractionally integrated, multivariate models. We present a procedure that
permits us to test the seasonal fractional differencing parameters from the reduced-form system, which allows us to recover
the parameters of the structural model through simple restrictions as in the standard VAR case with the additional incorporation
of seasonality and fractional integration. An empirical application based on a bivariate system using GDP and unemployment
in the UK, USA and Japan is also carried out at the end of the paper. 相似文献
76.
Juncal Cunado Luis A. Gil-Alana Fernando Pérez de Gracia 《Review of World Economics》2006,142(1):67-91
We examine the real convergence hypothesis for 14 OECD countries looking at the fractional order of integration of the differences
of real GDP per capita in these countries with respect to the United States. Using parametric procedures, the results vary
depending on how we specify the I(0) disturbances. If they are white noise, convergence is achieved for Canada and Australia,
and with autocorrelated disturbances, this hypothesis is satisfied for France and the Netherlands. However, allowing for a
break at World War II, evidence of convergence is obtained for all countries.
JEL no. C32, O41 相似文献
77.
Method for identifying strategic objectives in strategy maps 总被引:1,自引:1,他引:0
Luis E. Quezada Felisa M. Cordova Pedro Palominos Katherine Godoy Jocelyn Ross 《International Journal of Production Economics》2009,122(1):492
This paper describes a simple tool for identifying strategic objectives as part of the design of strategy maps, based on the balanced scorecard, and meant to be used in organisations to establish performance indicators. To design the tool, a number of companies that implemented the balanced scorecard were analysed, in order to obtain their methodologies to create strategy maps. Three types of methods were found, different from each other in the way the strategic objectives are defined. By studying the benefits and drawbacks of the three methods, a simple, method was obtained. Basically, the method identifies general and specific strategic objectives and uses a modified SWOT (strengths, weaknesses, opportunities, threats) analysis. This paper also makes an analysis of the type of strategic objectives that the studied companies defined as part of the balanced scorecard implementation process. 相似文献
78.
Maria A. Cunha-e-Sá Maria M. Ducla-Soares Luis C. Nunes and Philippe Polomé 《American journal of agricultural economics》2004,86(2):444-454
In contrast to previous literature, we propose a consistency test that does not impose any particular common functional form for the preference structure underlying the travel cost (TC) and contingent valuation (CV) models. We derive testable consistency conditions between TC and CV data in the context of mixed demand systems when valuing changes in environmental quality. These conditions are a subset of the rationality conditions. The proposed consistency tests are implemented combining TC and CV data. The empirical results show that it is possible to combine stated TC and CV, but not revealed TC and CV data. 相似文献
79.
The growing interest organizations have in concepts like social involvement and sustainability has helped unite programs and practices of different natures, mostly in the form of large investments in local communities. But what role can employees play in achieving this corporate aim, and how do these policies affect the way employees see their organization? Unión Fenosa has been a pioneer in the Spanish business community in maintaining corporate social responsibility and the commitment of its employees to these values. An analysis of its Solidarity Day policy shows the perspective of its employees, their motivation, and the relations between them and their company. 相似文献
80.
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