Do crowded classrooms crowd out learning?

The concern that learning performance may be adversely affected by increased class size appears to be unfounded. But unchecked, the negative peer effect could hinder student achievement.Education Bangladesh ,School children Food ,Nutrition programs ,Food aid ,

Do crowded classrooms crowd out learning?

The concern that learning performance may be adversely affected by increased class size appears to be unfounded. But unchecked, the negative peer effect could hinder student achievement.Education Bangladesh ,School children Food ,Nutrition programs ,Food aid ,

Teachers'salaries in Latin America : a comparative analysis

Data from household surveys of 12 Latin American countries were used to assess how teachers'salaries compare with those of workers in other occupations. The results show that salaries vary among countries, ranging from an apparent 35 percent underpayment in Bolivia (compared with the contol group) to a 65 percent overypayment in Colombia. But when statistical controls are introduced for differences in education, hours worked, and gender composition between the teachers group and the comparator group, much of the earnings differential disappears. The authors conclude that the data do not support the position that teachers are either overpaid or underpaid.Teaching and Learning,Skills Development and Labor Force Training,Gender and Education,ICT Policy and Strategies,Primary Education

Empowering Women through Education and Influence: An Evaluation of the Indian Mahila Samakhya Program

This paper shows that participation in a community-level female empowerment program in India significantly increases participants' physical mobility, political participation, and access to employment. The program provides support groups, literacy camps, adult education classes, and vocational training. We use truncation-corrected matching and instrumental variables on primary data to disentangle the program's mechanisms, separately considering its effect on women who work, and those who do not work but whose reservation wage is increased by participation. We also find significant spillover effects on non-participants relative to women in untreated districts.women's empowerment, community-level interventions, impact evaluation, India

Racial, Ethnic, and Urban/Rural Differences in Transitions into Diabetes: Evidence from the Health and Retirement Survey Biomarker and Self-Reported Data

We examine differences in transitions between stages of type 2 diabetes across racial, ethnic, and urban/rural statuses. The individual-level data from the 2006 to 2012 waves of the Health and Retirement Survey (HRS) and county-level data from the 1990-2000 U.S. Censuses, the Dartmouth Atlas of Health Care, and the Inter-university Consortium for Political and Social Research are used to analyze the transition from the stage of prediabetic to diabetic, and the transition from having no diabetes to being prediabetic and diabetic. The HRS includes both biomarker data and self- reported doctors’ diagnoses of diabetes, which allow us to identify people who are prediabetic and undiagnosed diabetics. The likelihood of reporting the transition from prediabetes to diabetes increases with the degree of rurality. Adding county-level proxies for structural disadvantage and individual-level correlates to the regressions attenuate race/ethnicity and rurality disparities in the development of diabetes

The Impact of Child Labor and School Quality on Academic Achievement in Brazil

We analyze the impact of child labor on school achievement using Brazilian school achievement test data from the 2003 Sistema Nacional de Avaliação da Educação Básica (SAEB). We control for the endogeneity of child labor using instrumental variable techniques, where the instrumental variable is the average wage for unskilled male labor in the state. Using our preferred OLS estimates, we find that child labor causes a loss in students' school achievement. Children and adolescents who do not work have better school performance than students who work. Up to two hours of work per day do not have a statistically significant effect on school performance, but additional hours decrease student's achievement. Differences in work conditions affect school performance. For high school students in Portuguese, compared to students who have schooling as their only activity, students who work only at home score 4 percent lower on the tests. Those students who only work outside the house are worse off than those who only work within the house, with test scores decreasing by 5 percent. Students who work both inside and outside the house have the lowest test scores of all the working conditions, decreasing by up to 7 percent.child labor, school achievement, Brazil

The quantity-quality transition in Asia

Societies in which fertility is falling and human capital investment per child increasing are experiencing a “quantity-quality transition.” Such transitions imply, over the long term, both slower rates of labor force growth and higher levels of human capital per worker. They are fundamental to economic development. Yet, these transitions are neither automatic or self-propelling. Their momentum depends on competing forces acting at both the family and the macroeconomic levels; the balance can easily tip against further transition. Family decisions about schooling are largely motivated by its private economic returns. These returns are determined in labor markets, and here the logic of supply and demand applies. When families decide to invest more deeply in their children, they collectively produce right-ward shifts in the supply of educated young labor. If other things are held fixed, the rate of return to schooling should then fall, and this, in turn, should dampen parental enthusiasm for further educational investments. Reductions in the rate of return should also weaken the case for continued reductions in fertility. Unless they are counterbalanced by other forces, such negative feedbacks would tend to bring a quantity-quality transition to a halt. The aim of this paper is to explore both the negative and positive feedbacks that have affected the quantity-quality transition in Asia. We assemble the leading hypotheses and evidence on the macroeconomic forces, both domestic and international, that could influence returns to schooling. We also examine family factors, giving particular attention to the intergenerational links that seem to have maintained the momentum of the Asian transition. Our conclusion is that negative feedbacks associated with increases in the relative supplies of educated labor have been largely offset by beneficial macroeconomic change (resulting from increases in the stock of physical capital, substantial technological change, and trade) and by powerful family-level effects that, over the generations, have continued to propel the transition

The effects of schooling incentive programs on household resource allocation in Bangladesh

This paper examines the impact of programs that provide incentives for school attendance in rural Bangladesh-a food-for-education program for poor primary-school children and a secondary-school scholarship scheme for girls. Detailed time-use data were available from a 1991-92 village study conducted prior to the programs’ implementation as well as for two points in time in 1995 and 1996 when the programs were in place. The time children spent in school increased dramatically, especially for adolescent girls. Families were able to take advantage of the school programs because of the short school days required and because of the compatibility of household work with schooling. Data from 1992 and 1995 show that a sudden increase occurred in marriage postponement for adolescent girls, because the secondary-school scholarship program required parents to sign a bond assuring that their daughters would not be married before age 18. The effects of the incentives varied by gender. Adolescent boys were less likely to remain in school and more likely to leave to do wage work. Parents may have decided to send adolescent girls to school and adolescent boys to work in response to the incentives

Using Assessment to Improve Teacher Efficacy in the Actualization of Student Outcomes: An Instrumental Case Study Approach

The present study was designed to explore the relationship between perceived teaching style (PTS) and student outcomes in the classroom at a small Midwestern liberal arts college. A case study method was used to explore the relationship between PTS and learning outcomes. Quantitative data in the form of both survey assessment and posttest measures provided information about student outcomes; this information was coupled with a phenomenological inquiry process that was used to explicate PTS. The data suggests that student perceptions regarding “care” significantly relate with affective, behavioral, and cognitive outcomes; these findings fill a gap in the literature on the topic of face support, care, and empathy as it relates with student learning outcomes. Extrapolating these findings beyond the small Midwestern liberal arts college must be done with caution, and while the authors are certainly aware of this exigency, the feedback provided was used as part of an assessment cycle to guide the development of new faculty

Multiplicity: an organizing principle for cancers and somatic mutations

<p>Abstract</p> <p>Background</p> <p>With the advent of whole-genome analysis for profiling tumor tissue, a pressing need has emerged for principled methods of organizing the large amounts of resulting genomic information. We propose the concept of multiplicity measures on cancer and gene networks to organize the information in a clinically meaningful manner. Multiplicity applied in this context extends Fearon and Vogelstein's multi-hit genetic model of colorectal carcinoma across multiple cancers.</p> <p>Methods</p> <p>Using the Catalogue of Somatic Mutations in Cancer (COSMIC), we construct networks of interacting cancers and genes. Multiplicity is calculated by evaluating the number of cancers and genes linked by the measurement of a somatic mutation. The Kamada-Kawai algorithm is used to find a two-dimensional minimum energy solution with multiplicity as an input similarity measure. Cancers and genes are positioned in two dimensions according to this similarity. A third dimension is added to the network by assigning a maximal multiplicity to each cancer or gene. Hierarchical clustering within this three-dimensional network is used to identify similar clusters in somatic mutation patterns across cancer types.</p> <p>Results</p> <p>The clustering of genes in a three-dimensional network reveals a similarity in acquired mutations across different cancer types. Surprisingly, the clusters separate known causal mutations. The multiplicity clustering technique identifies a set of causal genes with an area under the ROC curve of 0.84 versus 0.57 when clustering on gene mutation rate alone. The cluster multiplicity value and number of causal genes are positively correlated via Spearman's Rank Order correlation (<it>r_s</it>(8) = 0.894, Spearman's <it>t </it>= 17.48, <it>p </it>< 0.05). A clustering analysis of cancer types segregates different types of cancer. All blood tumors cluster together, and the cluster multiplicity values differ significantly (Kruskal-Wallis, <it>H </it>= 16.98, <it>df </it>= 2, <it>p </it>< 0.05).</p> <p>Conclusion</p> <p>We demonstrate the principle of multiplicity for organizing somatic mutations and cancers in clinically relevant clusters. These clusters of cancers and mutations provide representations that identify segregations of cancer and genes driving cancer progression.</p