Search results

The objective of this paper is to analyze in an international setting the relationship between environmental disclosures, carbon emissions and gender equality on the board of directors with the cost of equity (CoE) in the food and beverage sector.

The study sample includes 142 listed firms and 1,562 firm-observations from 35 developed and developing countries between 2009 and 2019. The authors implement a fixed-effects regression model to contrast the impact of the three sustainable variables of interest on the CoE.

The results of this study indicate that firms in the food and beverage industry benefit from a lower CoE due to better environmental disclosures and gender equality. On the other hand, carbon intensive firms are penalized with higher equity costs.

This study expands prior research on the effects of sustainable behavior on the CoE in the food and beverage industry by taking into account additional sustainability variables and a greater number of observations, both from developed and from developing countries.

This paper aims to propose using polylactic acid (PLA) as an alternative to nanocomposites in additive manufacturing processes in fusion deposition modelling (FDM) systems and describe its thermal and rheological conditions with multi-wall carbon nanotube (PLA/MWCNT) and halloysite nanotube (PLA/HNT) composites for possible applications in additive manufacturing processes.

PLA/MWCNTs and PLA/HNTs were obtained through fusion in a co-rotating twin-screw extruder. PLA was mixed with different percentages of MWCNTs and HNTs at concentrations of 0.5 Wt.%, 0.75 Wt.% and 1 Wt.%. Differential scanning calorimetry (DSC) and capillary rheometry were used to characterise these products, together with an analysis of the melt flow index (MFI).

The DSC data revealed that the nanocomposites had a glass transition temperature T_g = 65 ± 2°C and a melting temperature T_m = 169 ± 1°C. The crystallisation temperature of PLA/MWCNTs and PLA/HNTs was between 107 ± 2°C and 129°C, respectively. The viscosity data of PLA/MWCNTs and PLA/HNTs obtained by capillary rheometry indicated that the viscosity of the materials is the same as that of neat PLA. These results were confirmed by the higher fluidity index in the MFI analysis.

This paper presents an alternative for the applications of nanocomposites in additive manufacturing processes in FDM systems.

This paper aims to describe the influence of maleinized linseed oil (MLO), when used as a lubricant, on the thermal and rheological properties of PLA/MWCNTs (polylactic acid/multi-walled carbon nanotubes) and PLA/HNT (halloysite nanotubes) nanocomposites, as a reference for application in 3D printing processes.

Nanocomposites were obtained by melting in a twin-screw extruder, mixing PLA with MWCNTs and HNTs in different percentages of 0.5, 0.75 and 1 Wt.% for subsequent mixing by the same process with 5 phr MLO, for application in additive manufacturing, as analyzed by means of differential scanning calorimetry (DSC), capillary rheometry, melt flow rate (MFL) and field emission scanning electron microscopy (FESEM).

The results obtained for thermal characterization by using DSC indicate the non-variation of glass transition temperature Tg = 62 ± 2°C and a melting temperature (Tm) around 170°C. Crystallization temperature dropped by approximately 12°C, which should be kept in mind during the transformation processes. The values obtained by capillary rheometry indicate that the material’s viscosity is reduced by the influence of the MLO plasticizer’s lubricant effect on the PLA’s molecular structure. The melt flow index values confirm a rise of approximately 46% in the flow index and back up the capillary rheometry results. The values obtained were as follows: PLA/0.5 Wt.% MWCNT/MLO 5 phr 54.07, PLA/0.75 Wt.% MWCNT/MLO 5 phr 53.46, PLA/1 Wt.% MWCNT/MLO 5 phr 51.84y PLA/0.5 Wt.% HNT/MLO 5 phr 61.8, PLA/0.75 Wt.% HNT/MLO 5 phr 68.3 and PLA/1 Wt.% HNT/MLO 5 phr 71.2 g/10 min. Apart from the nanocharge distribution, the information obtained from the FESEM shows the existence of a cluster, which could have been avoided by more energetic stirring during the nanocompound manufacturing process.

This paper presents an analysis of the insertion of plasticizer in nanocomposites for the application in additive manufacturing processes in fusion deposition modelling (FDM) system.

This is a novel original research work.

Corporate social responsibility (CSR) actions are expected to reduce information asymmetries and increase legitimacy among the stakeholders of the company, which consequently should have a positive impact on the financial conditions of the firm. Hence, the objective of this paper is to find empirical evidence on the negative relationship between sustainable behavior and the cost of equity, in the specific context of Latin America. To address this issue, some proxies and moderating variables for sustainability are used in our study.

The regression model considers a sample with 252 publicly trading firms and 2,772 firm-year observations, from 2008 to 2018. The generalized method of moments is used to avoid endogeneity problems.

The study finds evidence that firms with higher environmental, social and governance activities disclosed by sustainability reports and assured by external providers decrease their cost of equity, especially if they are in an integrated market as MILA. This finding confirms that agency conflicts between firm's management and stakeholders diminish with higher CSR transparency, leading to a lower cost of capital.

Our research is unique and valuable as, to our knowledge, it is the first study to analyze the impact of sustainable behavior and the cost of equity from companies operating in Latin America.

Las actividades de Responsabilidad Social Empresarial permiten disminuir asimetrías de información e incrementar la legitimidad ante los stakeholders de una empresa, generando impactos positivos financieros para la misma. De hecho, el objetivo del artículo es medir la relación entre el comportamiento sostenible y el Costo de Capital en el contexto empresarial latinoamericano. Para ello, consideramos algunas variables proxy y moderadoras sustentables en nuestro estudio.

El modelo considera una muestra de 252 empresas cotizadas y 2772 observaciones que abarcan el período de 2008 a 2018. Se implementa el Modelo Generalizado de Momentos para evitar problemas de endogeneidad.

Los autores evidencian que empresas con altos niveles de divulgación ambiental, social y gobernanza corporativa a través de reportes de sostenibilidad y asegurados por proveedores externos disminuyen el Costo de Capital, especialmente si cotizan en un mercado integrado como el MILA. Estos hallazgos confirman que se reduce la asimetría de información entre la gerencia y los stakeholders, dado que incrementa la transparencia mediante la Responsabilidad Social Corporativa y ello conduce a un menor Costo de Capital.

Nuestro estudio es único dado que, hasta la fecha, es el primer estudio que analiza el impacto de la divulgación voluntaria de RSE y Costo de Capital de empresas que operan en Latinoamérica.

The purpose of this paper is to challenge the default portrayal of street trade as an informal occupation and spatial practice, by examining comparatively the changes in the regulatory frameworks of two politically distinct city administrations in Latin America since the introduction of the informal economy debate.

This paper draws from a comparative case study design to synthesize evidence from historical administrative records, secondary research and materials from a two-year fieldwork carried out in Lima and Bogotá in 2008 and 2009.

The author argues that the incorporation of the informal economy framework into local governments’ policymaking has reframed street trade as a subject of policy. Since the 1970s, the author traces a shift from worker-centered initiatives, through the deregulation of street trade, to entrepreneurial-centered approaches. Nowadays, both, Lima’s neoliberal governance focusing on “formalizing” and Bogotá’s socialist/progressive governance aiming at “upgrading” street trade respond more explicitly to distinct assessments about the informal economy – legalist and dualist, respectively. Yet, both cities converge in that the closer street trade is perceived as an informal occupation; the more likely policy initiatives decouple the right to work from the right to access public space, spurring more marginal forms of street vending.

Even though the informal economy framework has helped to draw attention to important policy issues locally, nationally and internationally, this paper calls for a critical revision of such framing at the local level to allow for inclusive urban governance.

This paper aims to present a detailed description of Agents for Enriching Services (AES), an agent-oriented framework that allows adapting a service in an information system. AES provides an adaptation logic that can be instantiated and extended to be useful in different domains. In previous works, we presented the adaptation mechanism of AES, which considers context aspects such as location, infrastructure; user aspects such as preferences and interests; and device aspects such as hardware and software features.

The first step was the definition of different profiles, mainly user and context profiles. Then the adaptation mechanism was defined, which considers these profiles. With this mechanism, the adaptation filters to apply them to the initial queries was specified. Finally, feedback was provided, which included implicit and explicit information from the user and the system. AES is an agent-based framework implemented in Java, using the multi-agent platform BESA and a rule-based engine Drools.

AES can be used as the starting point to adapt services by enriching them considering different stimulus whether they come from the environment, devices or user preferences.

This work was tested in an academic environment and was only applied to enhance queries by using keywords. AES uses the query mechanism implemented in the system that invokes it.

This paper focuses on: an integrated view of AES including its formal description and details about its implementation. Particularly, it includes an exhaustive and formal definition of the filters used to create the adaptation rules and three different scenarios of the application of AES to adapt content according to user and context features. Finally, a comparison analysis is presented to highlight the strengths of our framework, specially its capacity of integration with systems that require providing user- and context-oriented services.

Knowledge management has historically been approached in private firms as a key factor for business management. However, this is not the case for government institutions. The existing literature on the transfer of knowledge appears as a topic little addressed in government and even to a lesser degree within the police forces. This study aims to evaluate the relationship between motivation, knowledge absorption, knowledge transfer and innovative behavior in a public organization such as the Puerto Rico Police.

This quantitative research using the survey technique had the participation of 300 police officers from the 13 police regions of Puerto Rico and the research model was analyzed through partial least squares structural equation modeling.

The results contribute to the growth of the currently limited literature at identifies how motivation, knowledge absorption, knowledge transfer and institutional support influence innovative behavior.

The study discusses a series of implications on less explore the issue in how the transfer of knowledge becomes a key force to produce change and the success of all reforms. Various implications for the success of public administration in bringing a change from a bureaucratic culture to an advanced one are also discussed.