Aspectos de una política latinoamericana en el sector de los productos básicos = Aspects of a Latin American policy in the commodities sector

Incluye Bibliografía

La relación de intercambio de los productos primarios de América Latina y el Caribe = Terms of trade of primary commodities in Latin America and the Caribbean

Incluye Bibliografía

On Graphically Checking Goodness-of-fit of Binary Logistic Regression Models

OBJECTIVES: This paper is concerned with checking goodness-of-fit of binary logistic regression models. For the practitioners of data analysis, the broad classes of procedures for checking goodness-of-fit available in the literature are described. The challenges of model checking in the context of binary logistic regression are reviewed. As a viable solution, a simple graphical procedure for checking goodness-of-fit is proposed. METHODS: The graphical procedure proposed relies on pieces of information available from any logistic analysis; the focus is on combining and presenting these in an informative way. RESULTS: The information gained using this approach is presented with three examples. In the discussion, the proposed method is put into context and compared with other graphical procedures for checking goodness-of-fit of binary logistic models available in the literature. CONCLUSION: A simple graphical method can significantly improve the understanding of any logistic regression analysis and help to prevent faulty conclusions.

Medication double-checking procedures in clinical practice: a cross-sectional survey of oncology nurses' experiences.

BACKGROUND Double-checking is widely recommended as an essential method to prevent medication errors. However, prior research has shown that the concept of double-checking is not clearly defined, and that little is known about actual practice in oncology, for example, what kind of checking procedures are applied. OBJECTIVE To study the practice of different double-checking procedures in chemotherapy administration and to explore nurses' experiences, for example, how often they actually find errors using a certain procedure. General evaluations regarding double-checking, for example, frequency of interruptions during and caused by a check, or what is regarded as its essential feature was assessed. METHODS In a cross-sectional survey, qualified nurses working in oncology departments of 3 hospitals were asked to rate 5 different scenarios of double-checking procedures regarding dimensions such as frequency of use in practice and appropriateness to prevent medication errors; they were also asked general questions about double-checking. RESULTS Overall, 274 nurses (70% response rate) participated in the survey. The procedure of jointly double-checking (read-read back) was most commonly used (69% of respondents) and rated as very appropriate to prevent medication errors. Jointly checking medication was seen as the essential characteristic of double-checking-more frequently than 'carrying out checks independently' (54% vs 24%). Most nurses (78%) found the frequency of double-checking in their department appropriate. Being interrupted in one's own current activity for supporting a double-check was reported to occur frequently. Regression analysis revealed a strong preference towards checks that are currently implemented at the responders' workplace. CONCLUSIONS Double-checking is well regarded by oncology nurses as a procedure to help prevent errors, with jointly checking being used most frequently. Our results show that the notion of independent checking needs to be transferred more actively into clinical practice. The high frequency of reported interruptions during and caused by double-checks is of concern.

Price formation in commodities markets. Financialisation and beyond. Report of an ECMI/CEPS Task Force

This report attempts to demystify the sphere of commodities markets worldwide by providing an in-depth examination of the major commodity groups, focusing on product characteristics, supply chains, pricing, liquidity, financial intermediation, industry players and the interplay between derivatives markets and the underlying physical goods. In so doing, the report contributes to the international debate with important information about the diverse market structures across commodities, including supply and demand elasticities, concentration of ownership, infrastructure organisation and layers of financial participation. While describing the endogenous factors, it also examines the increasing role of exogenous factors now impacting commodities. Finally, it assesses the drivers of the growth of derivatives markets and their impact on price formation. This report is a draft of the final version presented at a meeting at CEPS on 9 July 2013. A final version will be uploaded at the end of the summer when the book will be available in print.