The impact of mandatory trans fat labeling on product mix and consumer choice: A longitudinal analysis of the U.S. Market for margarine and spreads

The impact of changes in food labeling policy on food consumption depends on how market participants—both firms and consumers—react to the changes across all products in the market. We investigate how both responded to the U.S. Food and Drug Administration’s 2006 rule mandating that the quantity of trans fat in food products be separately labeled on the mandatory Nutrition Facts Panel across an entire differentiated product category. Using a longitudinal data set tracking both product offerings and consumer purchases in the market for margarine and spreads for over a decade, we analyze how product mix and consumer purchase behaviors were influenced by the new regulatory requirement. We find that the number of products bearing voluntary “trans fat free” labels increased after the labeling regulation was implemented. However, a large number of the newly introduced products exited the market within five years. As a result, the FDA’s 2006 rule had a stronger short-run than long-run effect on product offerings. Even after the introduction of additional “trans fat free” labeled products, such products remained only a small percentage of margarine and spreads product offerings, increasing from a pre-regulation level of 2.3% of the market to a peak of 6.5% in 2007 before dropping to 3.1% by 2011. In addition to firm response, we examine demand-side reactions to the 2006 rule and find that consumers significantly increased their expenditures on “trans fat free” labeled products soon after the labeling changes were implemented, increasing from about 1.2% of the market in 2001 to a peak of 5.9% in 2007, before returning to 1.8% in 2011. We further explore variations in responses across different demographic characteristics. Although long-run effects are small, the market for “trans fat free” labeled margarine and spreads settled into a new equilibrium with a somewhat higher level of products in the market than prior to the 2006 rule taking effect and a somewhat higher share of expenditures in the category. Overall, our category-wide analysis of both firm and consumer behavior indicates that the effects of the labeling policy change were smaller in the longer run in this market than would be indicated by an analysis of only new product introductions in response to the policy change.     

Fetal Iodine Deficiency and Schooling: A Replication of Field,Robles, and Torero (2009)*

Scholars have theorized that congenital health endowment is an important determinant of economic outcomes later in a person's life. Field, Robles, and Torero (2009, American Economic Journal: Applied Economics 1, 140–169) find large increases in educational attainment caused by a reduction of fetal iodine deficiency following a set of iodine supplementation programs in Tanzania. We revisit the Tanzanian iodine programs with a narrow and wide replication of the study by Field et al. We are able to exactly replicate the original results. We find, however, that the findings are sensitive to alternative specification choices and sample restrictions. We try to address some of these concerns in the wide replication; we increase the sample size fourfold, and we improve the precision of the treatment variable by incorporating new institutional and medical insights. Despite the improvements, no effect is found. We conclude that the available data do not provide sufficient power to detect a possible effect, as treatment assignment cannot be measured with sufficient precision.     

Primary education and fertility rates

Unified growth theory advances that the transition from a Malthusian regime to sustained economic growth is characterized by technological progress and, amongst other things, by an increase in demand for human capital which in turn creates incentives for lower fertility rates. Bearing that in mind, I ask the question: has southern Africa escaped the Malthusian stagnation? Specifically, I study whether primary school completion rates have played any role in total fertility rates in all countries of the Southern African Development Community (SADC) during the 1980–2009 period. Contrary to conventional wisdom, the results, based on dynamic panel time‐series methods, suggest that primary education is associated with lower fertility in the SADC, or that the community is already trading‐off quantity for quality of children. Although I do not claim causality, overall the results are significant because, in accordance with unified growth theory, they suggest that the SADC is experiencing its own transition from the Malthusian stagnation epoch into sustained growth, or that the SADC is going through its own post‐Malthusian regime.     

基于云计算的民族地区高校教育信息化平台建设研究——以贵州省为例

教育信息化程度成为了国家教育现代化程度的风向标,本文以"云计算"技术为抓手,从教育工作的流程出发,设计教育资源及教育管理两个平台。通过两个云平台的建设,夯实智慧教育基础,为智慧教育的应用开发提供强有力地保障。     

Education Dashboards for Enhanced Learning: A Singapore Experience

Educators continue to utilize add-ons, extensions, or replacements to traditional Learning Management Systems (LMSs) to supplement capabilities and improve the classroom experience. This work resulted in the design and development of the Education Dashboards for Enhanced Learning (EDEL) template. The EDEL template enables faculty members to create dynamic web spaces called Knowledge Portals (KPortals). A semester-long introduction of KPortals proved to be positive and useful. Students tended to view the KPortal as a “go-to” webspace. The authors hope to refine the template in future studies and examine its usefulness in other countries.     

高端技术技能人才贯通培养试验项目基础教育阶段学生素养教育体系构建

学生素养教育体系构建对高端技术技能人才贯通培养项目基础教育阶段学生的成长成才和可持续发展意义重大。北京财贸职业学院基础教育学院坚持立德树人，以社会主义核心价值观为统领，在实践中探索实施符合贯通培养项目基础教育阶段学生特点的素养教育，创新构建以“敬畏、感恩、笃学、卓越”为主题的“四三五五一”学生素养教育体系。     

示范性双语案例式互动教学模式研究——以《组织行为学》为例的理论框架与验证设计

双语教学是我国高等教育与国际接轨的必然趋势,也是当前高等教学改革的热点和重点之一。目前,我国有许多高校已开展全英语教学实践,进行了有益的探索,在取得一定经验的同时,也存在各种问题。本研究按照知识体系特点,根据Michael H.Long等西方学者的互动假说,对本科《组织行为学》示范性双语案例式互动教学模式,在理论设计、教学实践以及效果测试等方面进行了探讨和研究,并提出相关建议。     

中国政府义务教育支出：问题和进一步的改革

本文从理论方面探讨了政府在义务教育融资及生产中的责任，并结合中国政府义务教育支出的现状和问题，提出了进一步改革的原则、具体建议及相关改革措施。     

生育政策、子女数量与中国的性别教育平等

近年来,中国性别教育差距快速缩小并呈现出女性高等教育在校生比重超越男性的现象,文章从生育政策视角对这一现象进行了解释,认为计划生育政策通过改善女性教育获得显著促进了性别教育平等。队列分析显示,生育政策之后的出生队列中女性相对教育水平明显提高,性别教育差距明显缩小。基于生育政策地区差异和出生队列差异构建的双差分模型分析发现,以农村二孩政策地区为参照组,严格的独生子女政策在提高女性相对受教育机会方面更为明显。但相对于二孩政策,一孩半政策在促进性别教育平等方面不存在显著差异,这可能由于在一孩半政策下独女户和双女户数量较少,家庭受性别偏好影响会将资源向男性倾斜,导致政策没有通过控制家庭规模提高女性相对教育获得机会。研究认为,随着中国放松生育政策,农村地区由一孩半政策过渡到二孩政策并不会对女性教育获得产生明显影响,应该关注生育政策调整对严格独生子女政策地区女性教育获得的影响。同时,随着性别教育差距逐步缩小,可以利用劳动力市场政策降低市场性别歧视,进一步提高女性地位并促进性别平等。     

高等职业技术人才培养问题探究之一——“高素质高技能”之辨

高等职业技术教育是我国高等教育发展中的特定的办学类型,其间有许多问题需要研究和探索。文章选择对"高素质高技能"这一人才培养水平定位论题展开论述,提出人才素质应该具有较为完善的内在结构,素质包含德行、知识与能力,素质与技能不可割裂。高技能高素质人才须具备敬业精神与持续学习能力,其培养迫切需要社会广泛参与,特别是企业的参与,只有这样才能形成"大职业教育"的良好局面。