Authors Authors Cuauhtémoc Calderón Villarreal Holder of a BA in Economics from the Universidad Nacional Autónoma de México, UNAM, ; a MSc in Economics and International Politics from the Economic Research and Teaching Center (CIDE), Mexico; and of a Ph.D. in Economic Sciences by the Université de Nice-Sophia Antipolis, France; he currently works as a professor-researcher in the Department of Economic Studies from the El Colegio de la Frontera Norte. He is a specialist in macroeconomics and monetary economics, prices' levels, inflation and deflation, international economics, industrial organization and macroeconomics. His most recent publications are: Cuauhtémoc Calderón and Thomas M. Fullerton Jr., 2000, Inflationary Studies for Latin America, Texas Western Press; Cuauhtémoc Calderón and Thomas M. Fullerton Jr., Estudios Macroeconómicos para America Latina (Macro-economic Studies for Latin America), to be published by Porrua. Electronic mail address: calderon@colef.mx Alejandro I. Canales He is an economist from the Universidad de Chile, holder of a M.Sc in Demography and of a Ph. D. in Social Sciences from El Colegio de México. Professor-researcher in the Regional Studies Departament (INESER) from the Universidad de Guadalajara, and Director of the Population Studies Center, at the same university. Nowadays he is the president of the Latin American Association of Population and has been an ECLA consultant in migration and development issues. He is a member of the National Researchers System since 1994 (level II) and of the Mexican Academy of Sciences. His most recent books are: Panorama actual de las migraciones en América Latina, 2006, and October/December 2006 Papeles de POBLACIÓN No. 50 CIEAP/UAEM Desafíos teórico-metodológicos en los estudios de población en el inicio del milenio, 2004, coordinated along with Susana Lerner Sigal. Electronic mail address: acanales@cucea.udg.mx Juan Chackiel Graduate from the Facultad de Ciencias Económicas de la Universidad de la República de Uruguay . He has basic, advanced and specialized postgraduate courses in Demography in CELADE United Nations. Nowadays he is a consultant in Demography (technical advice and teaching in demographic analysis). He is the author of more than 50 publications in books and journals, out of which the last three are: "La dinámica demográfica en América Latina", "Demographic dynamics in Latin America" 2004, in the series Población y Desarrollo, number 52, coauthored with S. Schkolnik; "Los sectores rezagados en la transición de la fecundidad en América Latina", "The lingering sectors in the fecundity transition in Latin America" 2004, in Revista de la CEPAL, num. 83, and "Los censos de América Latina: nuevos enfoques", "The Latin American Census: New Approaches" 2004, in Revista Estadística y Economía, INE, Chile. Electronic mail address: jchackiel@eclac.cl Rodolfo Corona Vázquez He holds a B.A. in Financial Actuary from the Faculty of Sciences, UNAM. He coursed the specialization in Demography in the Latin American and the Caribbean Demographic Center (ECLAC). Nowadays he works as a researcher in el Colegio de la Frontera Norte. He is a level III National Researcher System from CONACyT. He obtained the 2003 National Demography Award. The researches he develops have been dedicated to methodology design of direct measurement and estimation of demographic phenomena, with special incidence in morbidity and domestic and international migration. He has more than a hundred publications among articles in journals, books and books' chapters. Electronic mail address: coronaro@colef.mx Authors Juan Gabino González Becerril Holder of a B.A in Economics from the Faculty of Economy from UAEM, a M.Sc in Population Studies from El Colegio de la Frontera Norte. He currently works as a professor-researcher for the Research and Advanced Studies (CIEAP), from the UAEM and courses Doctorate studies in Population Studies in el Colegio de México. He has been journalist for El Universal newspaper and academic journals with employment, urbanization and migration issues. Some of his recent publications worth mentioning: Laindustrizalización y urbanización del Estado de México. Electronic mail address: cieap@coatepec.uaemex.mx Alfonso S. González Cervera He is a full time professor-researcher from the Universidad Nacional Autónoma de México -Unidad Xochimilco. He is a Medical Surgeon from the UNAM, with a M.Sc in Medical Demography from the University of London; specialty in Population and Development, from the University J. Nehru, and a Ph.D. in Anthropology (UNAM). His most recent publications are: "Homicidios en la población menor de cinco años en México, 1992 - 2001", 2004, in Papeles de Población, number 40; and "Una aproximación a la medición del subregistro de nacimientos en las estadísticas vitales de México", 2005, in Estudios Demográficos y Urbanos, 20(3). Electronic mail address: agcerver@correo.xoc.uam.mx Roberto Ham Chande He holds a B.A in Financial Actuary from UNAM, and a M.Sc in Statistical Mathematics from the Inte-American Statistic Teaching Center, Santiago, Chile. He also holds a M.Sc from the Michigan State University and a Ph. D. in Demography from the Université de Paris-X, Nanterre. He has been a Financial Actuary for IMSS, ISSSTE and for private enterprises. He has been director from the Demographic Studies and Urban Development Center, from the Colegio de México. Nowadays he is a professor-researcher from the Department of Population Studies from the Colegio de la Frontera Norte. He is also a member of the National Researchers System level III. He has received the Fullbright October/December 2006 Papeles de POBLACIÓN No. 50 CIEAP/UAEM research grant. Author of: El envejecimiento en México: el siguiente reto de la transición demográfica, 2003, Porrúa and El Colegio de la Frontera Norte. Electronic mail address : rham@colmex.mx Mirna Hebrero Martínez She holds a BA in Financial Actuary from the Faculty of Higher Studies Acatlán, UNAM. She obtained the M.Sc degree in Demography from the Demographic Studies and Urban Development Center from El Colegio de México. She is the coordinator of programs subscribed to the Coordination of Policies from the Mexican Institute of Social Security (IMSS), Where she is responsible for the situational diagnostic of the legitimate claimant IMSS adult population, which is the basic input for the design of the 2006-2025 Institutional Gerontologic IMSS Plan. Nowadays she is a member of the researcher team of the CONACyT Rural Aging Project in high migration municipalities, coordinated by the Dr. Veronica Montes de Oca. She is coauthor of the article; "Mexico and the State of Guanajuato: Intergenerational transferences towards older adults", in the Notas de Población journal, number 80, ECLA. She has also participated as an expositor in different forums, congresses and national and international meetings on Aging in Mexico and Latin America. Electronic mail address : mirna.hebrero@imss.gob.mx J. Eduardo Mendoza Cota He is the current Director of the Economic Studies Department from El Colegio de la Frontera Norte. He is a member of the National Researchers System, and a member of the Editing Committee of the Frontera Norte journal, of the Academic Council and the Editorial Council from El Colegio de la Frontera Norte. He has recently published: "Liberalización económica y cambios en la dinámica de crecimiento económico regional en México", 2006 in Revista Comercio Exterior, volume 57, number 7. El TLCAN, la frontera y la integración México-Estados Unidos: Aspectos económicos, El Colegio de la Frontera Norte; "¿Existen efectos de la remesas y la migración hacia Estados Unidos sobre el crecimiento económico de México?", in Jerjes Aguirre, Remesas y desarrollo en México, Instituto de Investigaciones Económicas y empresariales, Universidad Michocana de San Nicolás Hidalgo. Electronic mail address : emendoza@colef.mx Authors Carmen A. Miró G. She is a demographer. She did postgraduate studies at Johns Hopkins University, Baltimore, United States and in the London School of Economics and Political Science, England. She is the Director of the Institute of National Studies (IDEN); she is a member of the Directive Council of the World Institute for Development Economics Research (WIDER) from the University of the United Nations, of the Advisory Panel from the Pacific Science Institute of the International Union of Scientists of the Population, based in Belgium, of the International Union of Sociology, based in Paris and of the Panamanian Association for the Advance of Science. She was given the United Nations World Population Award and the National Award of the Order of Belisario Porras in the rank of the Gran Cruz; she holds an Honoris Causa Ph. D. in Sociology from the Universidad de la Habana. Her most important work: América Latina: transición demográfica y crisis económica, social y política; Población y desarrollo. Estado del conocimiento y prioridades de investigación; Ciencias sociales y políticas de desarrollo: el posible impacto de la investigación en población; Capitalismo y población en el agro latinoamericano: tendencias y problemas recientes. Electronic mail address: cmiro@sinfo.net, celaja@pty.com Hugo Montes de Oca Vargas He is a Ph. D. student in Population studies in El Colegio de Mexico. MSc. in Demography from El Colegio de la Frontera Norte. He holds a B.A in Economy from the Faculty of Economics of the UAEM. His areas of interest are Demographic Aging, Population Dynamics and Internal Migration. Electronic mail address: hmontesdeoca@colmex.mx Verónica Montes de Oca Zavala She is a sociologist from the Faculty of the Political and Social Sciences from UNAM. She accomplished Master studies in Demography and Doctoral studies in social Sciences with specialty in Population from the Center of Demographic Studies and Urban Development from the Colegio de México. She is a Level I National Researcher in the National Researchers System and also an a titular full-time researcher from the Social Researches Institute, where she is also a October/December 2006 Papeles de POBLACIÓN No. 50 CIEAP/UAEM Technical Secretary. In that institution she researches on aging process, formal and informal support systems, as well as the older adults' situation in rural and urban environments. Nowadays she coordinates the project: Aging, families and social development. The Contrasts between rural and urban Mexico, Migration, Transnational networks and aging : studies of the transnational family networks of Guanajuato's older adults, as well as the rural aging in high-migration municipalities. She is the author of the book: Redes comunitarias. Participación, organización y significado de las redes de apoyo comunitarias entre hombres y mujeres adultos mayores: la experiencia de la colonia Aragón en la delegación Gustavo A. Madero, Ciudad de México. Electronic mail address: monteso@servidor.unaqm.mx Jaciel Montoya Arce He holds a Ph.D in sociology from UNAM, where he also accomplished his BA and M.Sc studies on the same subject. He has published several books, among them are: El proceso de metropolización en la ciudad de Toluca 1950-1990, Estado de México: población en movimiento. Un análisis demográfico del periodo 1950-1980, and Encuesta sobre prácticas de los sujetos sociales de la zona metropolitana de la ciudad de Toluca. His area of interest is the vulnerable groups. Currenlty he is the Coordinator of the Research and Advanced Studies of the Population Center from the UAEM. Electronic mail address: jma1@uaemex.mx Isalia Nava Bolaños She holds a B.A in Economics from UNAM. She accomplished her M.Sc in Demography from el Colegio de México and she is a candidate for the Ph. D. in Population Studies in the same Institution. She has elaborated the lectures "Seguridad Social y Dividendos Demográficos", "Social Security and Demographic Dividends", for the VIII National Meeting of Demographic Research in Mexico: Re-Thinking the agenda of policies and actions in the population issues, Mexican Society of Demography, September 69, 2006; "Discrepancy between the demographic dividends and the retirement pension system", at the Evolution and Tendencies of the Pension Systems in Mexico Workshop", Economic Research Institute, " UNAM, 2006. Electronic mail address: inava@colmex.mx Authors Manuel Ordorica Mellado He holds an M.Sc in Demography from El Colegio de México and a Ph. D. in Engineering from UNAM. He was the Director of Area of Population Studies at the National Council of Population from 1977 to 1987; Education consultant in UNESCO, from 1987 to 1988; He is the coordinator of the MSc in Demography and Ph. D. in Population Studies with specialty in Population Studies of the Center of Demographic Studies and Urban Development from El Colegio de México. Nowadays he is the Secretary General of that very Institution. He is a member of the National Researchers System and Premio Nacional de Demografía. Among his most important publications are: Evaluation of the Mexican fertility survey, 1976-1977 (coauthored with Joseph E. Potter); The impact of rapid fertility decline on the geographical redistribution of the population in developing countries, and Ajuste de una función expologística a la evolución de la población total de México, 1930-1985, Electronic mail address: mordori@colmex.mx Jorge Santibáñez Romellón He is a holder of a B.A in Mathematics from UNAM. He holds a Ph. D. in Mathematics (Probability and Statistics option) from Louis Pasteur University, Strasburg, France. His areas of specialization in Mathematics are: Theory of Probability, Stochastic processes, trajectory of processes, stochastic, statistics, methodology for numeric information, methodology of observation of migratory flows. Work areas: application of probability and statistics, international migration, sampling, development of methodology to generate, process and analysis of numeric information, quantitative evaluation of social programs and public policies, Mexico-United States Relation, borders of Mexico. Nowadays he is the president of El Colegio de la Frontera Norte. He has given more than 100 courses on Teaching in different national and international institutions. He has recently published: "Los enigmas del emigrante", 2006, in Expansión, number 939, Mexico; "Migración: el reto de administrar mientras llega el desarrollo", 2006, in Día Siete, number. 307; Mexico; "La migración internacional: la asignatura pendiente de México", in México en el mundo, La agenda Internacional de México 2006-2012, editorial Planeta. Besides, he participates as a collaborator in different communication media. Electronic mail address: santi@dns.colef.mx October/December 2006 Papeles de POBLACIÓN No. 50 CIEAP/UAEM Rodolfo Tuirán Gutiérrez He is an economist, a demographer and a sociologist. He accomplished a Ph. D. in sociology from the University of Texas, in Austin. He has been sub secretary of the Ministry of Social Development (from April 2002 to January 2006) and secretary general of the National Council of Population, (from June 1997 to March 2002). He was the president of the Mexican Society of Demography (1996 and 1998) and professor-researcher from El Colegio de México (19831996). He is the author or coordinator of 24 books and has published more than 160 articles of socio-demographic character in specialized journals and books. He received the National Prize of Demography in 2004 and he is a national researcher from the National Researchers System since 1991 Electronic mail address: rtuiran@gmail.com Carlos Welti Chanes He is an economist, a sociologist and a demographer from the University of Chicago. He is a titular researcher from the Institute of Social Researches from UNAM. He is a member of the National Researchers System since its foundation. He has been president of the Mexican Society of Demography, general coordinator of the Latin American Program of Activities in Population and Vice-rector of Research and Postgraduate Studies of the Autonomous University of Puebla. He is a Quantitative Analysis professor in the Faculty of Political and Social Sciences in UNAM. He is a member of the of Administration Council of the Family Planning Mexican Association and he presides its technical committee. He has published a great deal of works on fecundity. In one of his most recent works he analyzes the information of the National Survey on Reproductive Health of 2003, where he shows the possible overestimation of the fecundity descent in Mexico in the recent years. Electronic mail address: welti@servidor.unam.mx