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91.
Oscar Cacho & Phil Simmons 《The Australian journal of agricultural and resource economics》1999,43(3):305-322
A farm portfolio model is specified with two risky enterprises and a risk-free asset which may be held short or long by the farmer. The model is solved numerically using a genetic algorithm. It is shown that the assumption of competitive adaptation leads to a violation of normative efficiency. Those who survive are not the most efficient in a normative sense. 相似文献
92.
Jhon Wilder Zartha Sossa Oscar Hernán López Montoya Julio Cesar Acosta Prado 《Business Strategy and the Environment》2021,30(2):1345-1356
This study seeks to identify and define the determinants of the sustainable innovation system (SIS). To achieve the objective, a qualitative approach was used through a systematic literature review using data from Web of Science (WOS) and Scopus. Two search equations were used to extract the data. In the first search equation, 69 documents were analyzed, and for the second, 102 documents were analyzed. Multiple definitions were found regarding SIS, it is worth highlighting in the findings the evolutionary process that these systems follow. As a contribution to the study, 79 determinants of an SIS are presented derived from the classic functions of an innovation system. 相似文献
93.
Equal employment laws are being enforced with increasing strictness. To avoid costly litigation, a manager should review his personnel structures to eliminate discriminatory practices. 相似文献
94.
Oscar David Marcenaro-Gutierrez Luis Alejandro Lopez-Agudo 《The South African journal of economics. Suid-afrikaanse tydskrif vir ekonomie》2020,88(3):267-297
Little is known about the causal impact of teacher knowledge on student performance. In this research paper we intend to approach the potential causal effect (i.e. going beyond correlation) of sixth grade teachers’ knowledge on their students’ academic achievement for three Sub-Saharan African countries. To achieve this, we have used the heterogeneity of teachers’ subject knowledge and students’ correspondent academic achievement within-student between-subjects using student fixed effects. Concretely, our work is based on previous research by Bietenbeck, Piopiunik and Wiederhold. Compared to them, we do not use countries that lack representative information after keeping only those students taught by the same teacher for the subjects under analysis. This enables us to obtain more reliable results on this issue. Our results indicate that teacher subject knowledge in reading and mathematics does not have a significant influence on student academic achievement in these subjects for the countries under scrutiny. Many robustness checks have corroborated this conclusion, which contrasts with the positive effect found by Bietenbeck, Piopiunik and Wiederhold. 相似文献
95.
Cardoso Matilde Neves Pedro Cunha Afonso Oscar Sochirca Elena 《Review of World Economics》2021,157(1):149-179
Review of World Economics - Offshoring, either as FDI or offshore outsourcing, is a phenomenon of increasing importance that has been widely studied in the economics literature. Studies analysing... 相似文献
96.
Ojeda-Joya Jair N. Jaulin-Mendez Oscar Bustos-Peláez Juan C. 《Atlantic Economic Journal》2019,47(3):275-292
Atlantic Economic Journal - In this paper, the interdependence between aggregate commodity prices and world gross domestic product (GDP) is studied by performing two empirical exercises with... 相似文献
97.
In this study we use disaggregated annual data to estimate real income and relative price elasticities of demand for imports of Venezuela. After comparing our estimates with those of previous studies, we conclude that (1) Venezuela has made progress in developing domestic substitutes for imports, and (2) the degree of ‘openness’ in Venezuela increased after 1961. We also find evidence that during the period 1974–1979, the increase in the market value of Venezuela's oil reserves led to an increase in all categories of imports. 相似文献
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Gustavo Lannelongue Javier Gonzalez‐Benito Oscar Gonzalez‐Benito 《Business Strategy and the Environment》2015,24(3):145-158
Firms invest considerable resources to control any of their operations that may have environmental impacts in an attempt to reduce such impacts but also generate economic value. Various studies of the basic creation or destruction of monetary value through environmental performance offer contradictory evidence. Therefore, the present study proposes a new definition of environmental management as the transformation of inputs (resources assigned) into outputs (valuable results). Both inputs and outputs should be taken into account to explain financial outcomes; further consideration should also include a third aspect, namely, ‘environmental management productivity’, which describes the relationship between the outputs and inputs of environmental management. Empirical analyses of Spanish firms with a certified environmental management system subject to the European Union's CO2 emissions trading system provide evidence that all three aspects must be considered in combination to achieve a more comprehensive view of the impact of environmental management on financial performance. Copyright © 2013 John Wiley & Sons, Ltd and ERP Environment 相似文献