The relationship between childhood obesity and food insecurity: a nonparametric analysis

Childhood obesity and food insecurity are major public health concerns in the United States and other developed countries. Research on the relationship between the two has provided mixed results across a variety of data sets and empirical methods. Common throughout this research, however, is the use of parametric frameworks for empirical analyses. This study moves beyond parametric methods by examining the relationship between childhood obesity and food insecurity among low-income children with nonparametric regression techniques. We examine data from the Child Development Supplement (CDS) of the Panel Study of Income Dynamics (PSID), a nationally representative data set from the US. Consistent with recent work, our parametric analyses indicate that there is no statistically significant relationship between childhood obesity and food insecurity. In contrast, our nonparametric results indicate that the probability of being obese varies markedly with the level of food insecurity being experienced by the child. Moreover, this relationship differs across relevant subgroups including those defined by gender, race/ethnicity and income. Fully understanding the relationship between childhood obesity and food insecurity has significant policy implications.     

Food assistance programs and food insecurity: implications for Canada in light of the mixing problem

In light of concerns about high rates of food insecurity, some have suggested that it might be time for Canada to implement national food assistance programs like those provided in the US, namely the Supplemental Nutrition Assistance Program (SNAP) and the National School Lunch Program (NSLP). In this paper, we assess how adopting these types of assistance programs would change the food insecurity rate in Canada among households with children. Using data from the Current Population Survey (CPS), we first evaluate the causal impact of these programs on food insecurity rates in the US using the Canadian definition of food security. Following other recent evaluations of food assistance programs, we use partial identification methods to address the selection problem that arises because the decision to take up the program is not random. We then combine these estimated impacts for the US with data from the Canadian Community Health Survey (CCHS) to predict how SNAP and NSLP would impact food insecurity rates in Canada. Partial identification methods are used to address the “mixing problem” that arises if some eligible Canadian households would participate in SNAP and others would not. The strength of the conclusions depends on the strength of the identifying assumptions. Under the weakest assumptions, we cannot determine whether food insecurity rates would rise or fall. Under our strongest nonparametric assumptions, we find that food insecurity would fall by at least 16% if SNAP were implemented and 11% if NSLP were implemented.     

The dynamics of food insecurity and overall health: evidence from the Canadian National Population Health Survey

The paper explores whether the responses to household food insecurity questions in cycles two and three of the Canadian National Population Health Survey help explain the links between socioeconomic status and health at the individual level. Short-term transitions in food insecurity status are correlated with changes in health status. There is some evidence for females but not for males that conditional on current health, current household food insecurity can lead to lower future health status, even in the short run. There is stronger evidence for both males and females that conditional on current household food insecurity status, lower current health status can lead to an increased probability of future household food insecurity.     

Analyzing Educational Achievement Differences between Second‐Generation Immigrants: Comparing Germany and German‐Speaking Switzerland

In this study, I provide evidence that the educational achievement of second‐generation immigrants in German‐speaking Switzerland is greater than in Germany. The impact of the first‐generation immigrants' destination decision on their offspring's educational achievement seems to be much more important than has been recognized by the existing literature. I identify the test score gap between these students that cannot be explained by differences in individual and family characteristics. Moreover, I show how this gap evolves over the test score distribution and how the least favorably endowed students fare. My results suggest that the educational system of Switzerland, relative to the German system, enhances the performance of immigrants' children substantially. This disparity is largest when conditioning on the language spoken at home, and prevails even when comparing only students whose parents migrated from the same country of origin.     

Household Food Insecurity and Maternal and Child Nutritional Status: Evidence from Maharashtra

In this paper we rigorously examine the association of household food security status with maternal and child nutritional status exploring a rich micro‐level database, the Comprehensive Nutrition Survey Maharashtra 2012. Using Household Food Insecurity Access Scale (HFIAS) as a metric to measure household food security, we apply simultaneous probit models to estimate the effect of food insecurity on maternal and child nutritional outcomes. The modelling framework addresses possible endogeneity in the above relationship. Findings indicate that household food insecurity increases the risk of maternal and child underweight with no effect on child stunting, wasting or maternal overweight. Women’s decision‐making power mediates these associations. Food security interventions should be effective in tackling the concerns with undernutrition, however, food alone is not the solution. A mix of nutrition‐specific and nutrition‐sensitive policies is warranted. Food security interventions should be integrated into policies for human development.     

Ordinal Variables and the Measurement of Upward and Downward Intergenerational Educational Mobility in European Countries

This article proposes a new approach to the measurement of intergenerational mobility in education. Borrowing the concept of inequality-sensitive and additive achievement measure axiomatically developed by Apouey et al., we derive new indices of upward, downward, and total mobility, using a “movement approach.” It turns out that the Prais-Bibby and Bartholomew mobility indices are particular cases of the mobility indices we introduce. We then present an empirical illustration based on the 2016 European Social Survey. Particular attention is given to within country differences between fathers to children and mothers to children educational mobility. When comparing two countries, we also make a distinction between gross and net mobility, the latter referring to the case where country differences in the educational structure of parents and children are neutralized.     

FOOD INSECURITY AND INSUFFICIENCY AT LOW LEVELS OF FOOD EXPENDITURES

In this study we investigate the external validity of the food insecurity and insufficiency measures—specifically, how these measures correlate with food expenditures—using the December 2003 Food Security Supplement of the Current Population Survey. We focus on a special segment of the population—households with low incomes and low food expenditures. If reports of food problems are based on a lack of food, reports should be nearly ubiquitous at the bottom of the expenditure distribution. We find, however, that this is not the case. We define and scale food expenditures several different ways and find that the reported incidence of food insecurity never rises above one‐half anywhere along the corresponding expenditure distributions, leading to concerns about the external validity of the measure.     

发展中国家粮食安全与贫困——基于“交换权利映射”的分析

发展中国家贫困的特征表现为生产力和人均收入水平低,这两点导致了发展中国家个人的粮食获取能力受到制约。市场交易、自行生产和粮食援助是个体获取粮食的三种渠道。贫困通过对这些因素的影响最终导致了对粮食安全的威胁。"交换权利映射"通过个体拥有的资源与交换权利集合的映射关系说明了在发展中国家因为贫困而导致的个体拥有的资源匮乏而使其处在粮食不安全集合中。     

The impacts of energy insecurity on household welfare in Cambodia: Empirical evidence and policy implications

This study investigates the impacts of energy insecurity on household welfare in Cambodia. The notion of energy insecurity is not well understood in the literature as well as in local contexts. This study defines household energy insecurity as the status quo derived from the interplay of inadequate and insufficient energy consumption that prevents households from meeting basic energy needs. The notion of energy insecurity can only be well understood by investigation in the local context as it varies from place to place. Households facing insufficient energy consumption may forgo many other opportunities. Once energy security has been defined in the Cambodian context, the study employs multiple regression models using the Cambodia Socio-Economic Survey Data (2015) to investigate the impacts of household energy insecurity. The study confirmed that energy insecurity has enormous negative impact on welfare of the households, with a further negative impact on the human capital formation of the children. The findings will lead to policy implications to improve household energy security, and thus impact economic, social, and environmental development.     

Schooling,educational achievement,and the Latin American growth puzzle

Latin American economic development has been perceived as a puzzle. The region has trailed most other world regions over the past half century despite relatively high initial development and school attainment levels. This puzzle, however, can be resolved by considering educational achievement, a direct measure of human capital. We introduce a new, more inclusive achievement measure that comes from splicing regional achievement tests into worldwide tests. In growth regressions, the positive growth effect of educational achievement fully accounts for the poor growth performance of Latin American countries. These results are confirmed in a number of instrumental-variable specifications that exploit plausibly exogenous achievement variation stemming from historical and institutional determinants of educational achievement. Finally, a development accounting analysis finds that, once educational achievement is included, human capital can account for between half and two thirds of the income differences between Latin America and the rest of the world.     

Feeding (On) Geopolitical Anxieties: Asian Appetites,News Media Framing and the 2007–2008 Food Crisis

This paper analyses the role of news media in (re)producing geopolitical narratives of food insecurity in relation to the 2007–2008 global food price spike. News content and textual analysis suggests that the media’s representation of the food price spike is partly framed by Western geopolitical anxieties of the ‘threatening rise of Asia’, and features ‘fast growing’ Asian appetites among the main culprits of the crisis. Seeking to explain the widespread circulation of such representation, this paper analyses media-source relationship within the context of market-driven journalism, and suggests that the changing role of news media has in turn contributed to a rapid and uncritical circulation of elite-based interpretation of, and neoliberal geopolitical approach to, food security. The paper points at the importance of critical enquiries into geopolitical representations of food insecurity and of opening media space for a ‘counter-geopolitics of food security’.     

Patience among children

Recent policy initiatives offer cash payments to children (and often their families) to induce better health and educational choices. These policies implicitly assume that children are especially impatient (i.e., have high discount rates); however, little is known about the nature of children's patience, how it varies across children, and whether children can even make rational inter-temporal choices. This paper examines the inter-temporal choices of 5- to 16-year-old children in an artefactual field experiment. We examine their choices between varying levels of compensation received in 2 or 4 months in the future and in 0 or 2 months in the future. We find that children's choices are consistent with hyperbolic discounting, boys are less patient than girls, older children are more patient and that mathematical achievement test scores, private schooling and parent's patience are not correlated with children's patience. We also find that although more than 25% of children do not make rational inter-temporal choices within a single two-period time frame, we cannot find variables that explain this behavior other than age and standardized mathematical achievement test scores.     

Intra-school competition and student achievement

Within the economics of education literature, numerous studies have investigated the relationship between educational market competition and educational achievement. Educational market competition has been defined as either the availability of vouchers within a community or the number of schools or school districts within the relevant market structure. While these studies have shown that increases in inter-district competition result in increased student achievement, no studies, to our knowledge, have yet investigated the effect of intra-school competition on student achievement. Within this study, a measure of intra-school competition is developed and the findings indicate that increased intra-school competition leads to increased student achievement.     

Learning Why More Learning Takes Place in Some Classrooms Than Others

Abstract. The relatively poor average performance of German students on the recent PISA international evaluations of 15- and 16-year-olds' literary skills (2000) and mathematical skills (2003) and the wide variation in performance, with low-income students scoring particularly poorly, have led to calls for reforms of the German educational system. Understanding why students in some classrooms learn more than do those in other classrooms is an important first step in considering alternative reform strategies. Possible explanations include differences in teacher quality, class sizes and peer groups, and also differences among the types of secondary schools that parents select for their children. This paper illustrates a set of techniques that are useful in examining the roles these factors play in predicting why, net of family background and prior achievement, the average achievement of children in some classrooms is much higher than that of children in other classrooms. We illustrate the use of these techniques with a dataset from Bogotá, Colombia, that has two attractive properties. First, some teachers teach multiple classes of students. Second, students are enrolled in schools in two sectors (public and private). Application of the techniques described in this paper could shed light on the reasons why the average academic achievement of German students attending some schools is much higher than that of German students attending other schools.     

Education on the cheap: The long-run effects of a free compulsory education reform in rural china

This paper evaluates the long-run effects of a free compulsory education reform in rural China on individuals’ educational attainment, cognitive achievement and health. We exploit the cross-province variation in the roll-out of the reform and apply a difference-in-differences strategy to identify the causal effects of the reform on the outcomes. We find that the reform exposure, measured by the number of semesters that an individual is supposed to be exposed to the free compulsory education, is positively associated with individuals’ educational attainment and cognitive achievement measured by math test scores in early adulthood. The reform effects on educational attainment become greater in the longer term. Moreover, the reform effect on educational attainment is stronger for individuals with less-educated fathers.     

Institutional arrangements in educational systems and student achievement: a cross-national analysis

Given the lack of evidence supporting the view that variation in observable educational inputs affect student achievement, many policymakers and researchers have tried to unearth the salient determinants of student learning. To that end, several recent studies have made use of international data on student achievement to assess the role played by institutional arrangements within the educational system. We revisit this literature using the 1999 TIMSS data—covering over 100,000 students from 22 countries—to analyze the association between different institutional arrangements and the distributions of science and math test scores. The results yield a number of interesting conclusions, as well as highlight the gains to analyzing student achievement within a distributional framework.     

The effect of childhood measles vaccination on school enrolment in Matlab,Bangladesh

There is increasing evidence that early childhood health interventions have long-term effects on cognitive development, educational achievement and adult productivity. We examine the effect of measles vaccination on the school enrolment of children in Matlab, Bangladesh. An intensive measles vaccination programme was introduced in one area in 1982, and extended to another in 1985, while a third area acted as a control. Using this staggered roll-out as an instrument, we find that age-appropriate vaccination raises the probability that a boy has enrolled in school by 7.4 percentage points but appears to have no effect on girls’ enrolment.     

Trouble in the Fields: Fair Trade and Food Sovereignty Responses to Governance Opportunities After the Food Crisis

Crisis can create opportunity for change. The 2007–2008 food price crisis has demonstrated that the existing structures of agricultural production and trade lend to food price volatility and renders many of the poorest people around the world vulnerable to food insecurity. Two movements that have raised such contentions over the years are the Fair Trade and Food Sovereignty movements, though in very different ways. My research examines the food crisis and its root causes, and the global governance mechanisms that have emerged in response. It then investigates and analyses whether and how these movements have responded to these new opportunities. The paper argues that engagement by both social movements is crucial to ensuring that the interests of those they represent are considered in the shaping of future governance of global food and agriculture.     

The determinants of cognitive and non-cognitive educational outcomes: empirical evidence in Spain using a Bayesian approach

This article aims to extend the literature about the role played by socio-economic and family background in educational outcomes by comparing the determinants of two different dimensions of educational output: academic achievement and non-cognitive traits. To do this, we explore the information provided by a self-report survey developed specifically for the purpose of this research. This will provide us with an innovative measure of non-cognitive performance based on particular personal traits, such as responsibility, effort, motivation and critical capacity, as well as a common measure of cognitive proficiency. We use a Bayesian approach to estimate the potential influence of multiple individual and family variables on both dimensions of educational output. From our results, we find that, despite some similarities, there are several important divergences with regard to some socio-economic variables that have been traditionally considered to be the most influential determinants of academic achievement which do not appear to have a significant impact on non-cognitive outcomes.