Socioeconomic status or noise? Tradeoffs in the generation of school quality information

This paper calculates a time series of simple, standard measures of schools' relative performance. These are drawn from a 1997–2004 panel of Chilean schools, using individual-level information on test scores and student characteristics for each year. The results suggest there is a stark tradeoff in the extent to which rankings generated using these measures: i) can be shown to be very similar to rankings based purely on students' socioeconomic status, and ii) are very volatile from year to year. At least in Chile, therefore, producing a meaningful ranking of schools that may inform parents and policymakers may be harder than is commonly assumed.     

International SMEs from emerging markets—Insights from the Colombian textile and apparel industry

The internationalization of firms from emerging markets has been studied mainly from the perspective of large firms. Smaller and younger international firms based in emerging markets suffer from underrepresentation in the literature. This study sheds light on the internationalization of emerging market SMEs, focusing on Colombian textile and apparel exporters. Using mixed research methods, it illustrates the role of firm age in influencing internationalization strategy. It examines 1165 export contracts by 50 SMEs, discussing export intensity, speed, and geographic scope using recurrence analysis and cluster analysis. It contributes to international entrepreneurship by exploring new empirical evidence and examining it using a novel methodological approach.     

The impact of media on the legitimacy of new market categories: The case of broadband internet

Building on research in institutional theory and market categories, we argue that media coverage, through the effects of cognitive and sociopolitical legitimacy, influence the creation of new market categories. Using data on the broadband access industry, we develop and test a media coverage model of market category entries, demonstrating the legitimacy effects of media-based information exchange on the emergence of new market categories. We include two post hoc analyses on mediation effects to test the relationship between population density and media coverage. These results indicate a possible mediation relationship, which we discuss in the implications of our study.     

Economic reforms and labour markets: policy issues and lessons from Chile

Over the last twenty years sweeping reforms have deeply transformed the labour market in Chile. A visible outcome has been the reduction of Chile's rate of unemployment from 'European' to 'US' levels. Even though the political context makes this experiment special, are there economic lessons to be learnt? This paper concentrates on reforms to job security, on the decentralization of the wage bargaining process, and on the reduction in payroll taxes. It concludes that the reduction of payroll taxes (within the context of the social security reform), and the decentralization of bargaining increased labour market flexibility and contributed to the reduction of unemployment. On the other side, the analysis suggests that the reform on job security had no significant effect on the aggregate rate of unemployment.     

Optimal group size in microlending

Microlending, where a bank lends to a small group of people without credit histories, began with the Grameen Bank in Bangladesh, and is widely seen as the creation of Muhammad Yunus, who received the Nobel Peace Prize in recognition of his largely successful efforts. Since that time the modeling of microlending has received a fair amount of academic attention. One of the issues not yet addressed in full detail, however, is the issue of the size of the group. Some attention has nevertheless been paid using an experimental and game theory approach. We, instead, take a mathematical approach to the issue of an optimal group size, where the goal is to minimize the probability of default of the group. To do this, one has to create a model with interacting forces, and to make precise the hypotheses of the model. We show that the original choice of Muhammad Yunus, of a group size of five people, is, under the right, and, we believe, reasonable hypotheses, either close to optimal, or even at times exactly optimal, i.e., the optimal group size is indeed five people.

     

Latent Class approach to analyze children’s nutritional trajectory and school dropout. A longitudinal population-based application

The study of the nutritional status is relevant during the entire life course, but in children it is relevant as malnutrition may be a marker of underlying functional and mental health deficits. Evidence of the association between malnutrition and school dropout is not conclusive. Our aim was to analyze children’s nutritional trajectory measured using their Body Mass Index (BMI) of a Uruguayan cohort and its association with school dropout. With this purpose, Latent Class and Joint Latent Class Mixed Models were fitted to children’s cohort study (N?=?1392 girls and 1492 boys) in sex-stratified analyses adjusting for sociodemographic characteristics. We identified latent classes of boys and girls with similar BMI trajectories during school years and differences in relevant socioeconomic and anthropometric characteristics. Results indicated that boys dropped out at younger ages than girls. No association between age of school dropout and nutritional trajectory classes was found. None of the classes exhibited a deficit or decrease in BMI trajectories during school ages, although the obesity and overweight classes could be of concern. Results suggested no significant association between obesity or overweight and age of school dropout for children up to 14 years old. Future research on other samples may inform about trajectories in higher educational levels.