Unwanted fertility in Mexico

Data from the 1987 National Health and Fertility Survey were used to explore trends and differentials in unwanted fertility in Mexico. Women were classified in three educational categories: illiterate or incomplete primary, complete primary or some secondary, and complete secondary or more. The four urbanization categories were: under 2500; 2500 to 19,999; 20,000 and more; and metropolitan areas. The place of primary socialization was the place of residence until age 12. Two categories of employment of household head were included, agricultural or nonagricultural. The categories for mother's employment considered employment until the union and employment between the time of union and the birth of the first child. The proportion of births that were unwanted was estimated by calculating the total fertility rate for the year before the survey and comparing it to desired family size. The "total desired family size" was 2.4 for the entire sample. In other words, nearly 37% of the total fertility rate was undesired. The greatest differentials in percentages of undesired fertility were found in educational categories. 40.7% of the total fertility rate in the least educated groups vs. 13.6% in the most educated groups was undesired. Differentials in the other categories ranged from 1.9 for a history of employment before the birth of the first child to 8.8 for agricultural or nonagricultural employment of the household head. When effects of education were controlled, the percentage of undesired fertility declined as educational level increased for all rural or urban residence categories, places of socialization, and employment groups except women who worked before the first child was born. Women with more education, urban residence, and with histories of employment had the lowest levels of undesired fertility.     

我爱北京

我叫Peter Gonzalez,来自美国的加利福尼亚。12年前,我从加州来到了中国。在这以前,我对中国是一无所知。当我穿着短裤踏上中国的土地,中国人都用奇怪的眼神看着我。当时是秋天,天气已经很凉了,他们一定认为,这个老外疯了。我心里清楚,我没疯,只是心里越来越兴奋,因为我喜欢上了中国,喜欢上了北京。     

Political Power, Fiscal Crises, and Decentralization in Latin America: Federal Countries in Comparative Perspective (and some Contrasts with Unitary Cases)

What factors shape decentralization processes in Latin Americanfederations? This work reviews and statistically analyzes currentapproaches on the topic, questions some claims of generalityin their theoretical frameworks, and presents an argument toexplain variation in decentralization processes across thesefederations. The main hypothesis is that the degree of decentralization(in fiscal and administrative terms) in Latin American federationshas been shaped by the political power of the national executiveand sub-national actors and the fiscal context in which theyinteract. The article presents statistical evidence (for federaland unitary countries between 1979 and 1998) to sustain someof the expectations in the argument and discusses some of itslimitations.     

Assessing the Relationship Between a Peer-Mentoring Program and Case Outcomes in Dependency Court

Building successful family-centered programs to support families whose children have been removed can be especially challenging to child welfare agencies. Peer-mentoring programs match families new to the dependency system with a mentor who has successfully reunified with their children. The current study examines the relationship between a peer-mentoring program, Parent for Parent (P4P), engagement levels of parents, and case outcomes for these families. Findings revealed that participants in the peer-mentoring program experienced increased engagement levels and improved outcomes for their cases. Specifically, mothers and fathers who participated in P4P increased their compliance with case plans and visitation, as well as increased presence at court hearings. Reunification rates increased for all families who participated in the peer-mentoring program, compared to those who did not. Few associations were found between racial and ethnic groups and program participation. The implications of these findings and suggestions for future research are discussed.     

A study on ten short tandem repeat systems: African immigrant and Spanish population data

This work presents the results obtained from a genetic–population study for the D1S1656 system in the population of Southwest Spain (Huelva, Cádiz and Sevilla), Spaniards of Caucasian origin from North Africa (Ceuta), as well as in the black Central West African and Moroccan immigrant populations in Spain. The results of a study of the autochtonous population of the Canary Islands (n=138), and immigrant Central West African populations in Spain (n=132), obtained for nine short tandem repeat (STR) loci (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, D7S820), as well as the amelogenin locus, all contained in Profiler Plus™ (Perkin-Elmer) PCR amplification kits, are also presented. Except for the FGA and VWA data on immigrant Central West African populations in Spain, no deviations from the Hardy–Weinberg equilibrium were detected.     

Combinatorics in the theory of utility

It used to be thought that the utility or pleasure that goods gave consumers depended on the whole on the nature of the goods and, particularly, on its quantity. This is half true, half false. The utility obtained from a set of goods depends mainly on how the goods are ordered and combined within the dynamic time sequence represented by consumption. In other words, it depends less on what the goods are and more on how the goods are positioned. Understanding this offers huge possibilities within the theory of utility--and thus of consumption--as it allows us to apply the arsenal of tools available to us in the mathematic speciality known as combinatorics, as applied to utility. If each combination of goods poses a utility, we can rank these combinations differently using ordinal criteria and real transitive preferences. From there we can establish a set of menus, from best to least poor, and, armed with this information, work out a theory of individual choice. This is in brief the purpose of this work.