Joint Regression and Association Models for Repeated Categorical Responses

The focus of this study is on statistical analysis of categorical responses, where the response values are dependent of each other. The most typical example of this kind of dependence is when repeated responses have been obtained from the same study unit. For example, in Paper I, the response of interest is the pneumococcal nasopharengyal carriage (yes/no) on 329 children. For each child, the carriage is measured nine times during the first 18 months of life, and thus repeated respones on each child cannot be assumed independent of each other. In the case of the above example, the interest typically lies in the carriage prevalence, and whether different risk factors affect the prevalence. Regression analysis is the established method for studying the effects of risk factors. In order to make correct inferences from the regression model, the associations between repeated responses need to be taken into account. The analysis of repeated categorical responses typically focus on regression modelling. However, further insights can also be gained by investigating the structure of the association. The central theme in this study is on the development of joint regression and association models. The analysis of repeated, or otherwise clustered, categorical responses is computationally difficult. Likelihood-based inference is often feasible only when the number of repeated responses for each study unit is small. In Paper IV, an algorithm is presented, which substantially facilitates maximum likelihood fitting, especially when the number of repeated responses increase. In addition, a notable result arising from this work is the freely available software for likelihood-based estimation of clustered categorical responses.

室温下(Ga,Mn)As中载流子的自旋弛豫特性

运用飞秒时间分辨抽运-探测克尔光谱技术,研究了室温下退火及未退火(Ga,Mn)As的载流子自旋弛豫的激发能量密度依赖性,发现电子自旋弛豫时间随激发能量密度增加而增大,而在同一激发能量密度下,退火样品比未退火样品具有更短的载流子复合时间、电子自旋弛豫时间和更大的克尔转角,显示DP机理是室温下(Ga,Mn)As的电子自旋弛豫的主导机理.退火(Ga,Mn)As的超快克尔增强效应显示其在超高速全光自旋开关方面的潜在应用价值,也为(Ga,Mn)As铁磁性起源的p-d交换机理提供了证据.

The Effect of Product Classifications on the Formulation of Export Unit Value Indices: A Comparison of Export Unit Value Indices based on SITC and HS

With the globalization of economic activity, the relative weight of foreign trade in national economic activities has increased, and the question of how to measure trends in the value and quantity of international trade has become an important issue for policy-makers and economists. This paper compares the chain-linked indices formulated by Masato Kuroko, based on HS this fiscal year for individual industry categories and countries with chain-linked indices based on SITC-R1 codes, in order to study how changes in the quality composition of the same products, which cannot be considered using unit value indices based on SITC-R1 codes, can be considered using unit value indices based on the more detailed HS product classifications.

Informe del trigésimo quinto Período de Sesiones de la CEPAL. Lima, 5 a 9 de mayo

Asistencia y organización de los trabajos .-- Temario .-- Desarrollo de la reunión.-- Resoluciones aprobadas por la CEPAL en su Trigésimo Quinto Período de Sesiones. 676(XXXV) Calendario de conferencias de la CEPAL para el período 2015-2016 .-- 677(XXXV) Conferencia Regional sobre la Mujer de América Latina y el Caribe .-- 678(XXXV) Conferencia Estadística de las Américas de la Comisión Económica para América Latina y el Caribe .-- 679(XXXV) Respaldo a la labor del Instituto Latinoamericano y del Caribe de Planificación Económica y Social (ILPES) .-- 680(XXXV) Comité de Desarrollo y Cooperación del Caribe .-- 681(XXXV) Conferencia Regional sobre Población y Desarrollo de América Latina y el Caribe .-- 682(XXXV) Establecimiento de la Conferencia Regional sobre Desarrollo Social de América Latina y el Caribe .-- 683(XXXV) Admisión de San Martín como miembro asociado de la Comisión Económica para América Latina y el Caribe .-- 684(XXXV) Prioridades y Programa de Trabajo de la Comisión Económica para América Latina y el Caribe para el bienio 2016-2017 .-- 685(XXXV) Actividades de la Comisión Económica para América Latina y el Caribe en relación con el seguimiento de los Objetivos de Desarrollo del Milenio y la aplicación de los resultados de las grandes conferencias y cumbres de las Naciones Unidas en las esferas económica y social y esferas conexas .-- 686(XXXV) Aplicación del Principio 10 de la Declaración de Río sobre el Medio Ambiente y el Desarrollo en América Latina y el Caribe .-- 687(XXXV) Dimensión regional de la agenda para el desarrollo después de 2015 .-- 688(XXXV) Comité de Cooperación Sur-Sur .-- 689(XXXV) Lugar del próximo período de sesiones.

Report of the thirty-fifth session. Lima, 5-9 May 2014

Attendance and organization of work .-- Agenda .-- Summary of proceedings .-- Resolutions adopted at the Thirty-Fifth Session of the Commission: 676(XXXV) ECLAC calendar of conferences for the period 2015-2016 .-- 677(XXXV) Regional Conference on Women in Latin America and the Caribbean .-- 678(XXXV) Statistical Conference of the Americas of the Economic Commission for Latin America and the Caribbean .-- 679(XXXV) Support for the work of the Latin American and Caribbean Institute for Economic and Social Planning .-- 680(XXXV) Caribbean Development and Cooperation Committee .-- 681(XXXV) Regional Conference on Population and Development in Latin America and the Caribbean .-- 682(XXXV) Establishment of the Regional Conference on Social Development in Latin America and the Caribbean .-- 683(XXXV) Admission of Sint Maarten as an associate member of the Economic Commission for Latin America and the Caribbean .-- 684(XXXV) Programme of Work and priorities of the Economic Commission for Latin America and the Caribbean for the 2016-2017 biennium .-- 685(XXXV) Activities of the Economic Commission for Latin America and the Caribbean in relation to follow-up to the Millennium Development Goals and implementation of the outcomes of the major United Nations conferences and summits in the economic, social and related fields .-- 686(XXXV) Application of Principle 10 of the Rio Declaration on Environment and Development in Latin America and the Caribbean .-- 687(XXXV) The regional dimension of the post-2015 development agenda .-- 688(XXXV) South-South Cooperation .-- 689(XXXV) Place of the next session .-- 690(XXXV) Lima Resolution .-- 691(XXXV) Ministerial Conference on the Information Society in Latin America and the Caribbean.