The heterogenous relationship of food stamp participation with body mass: Quantile regression model

This study explores the heterogenous relationship between Food Stamp Program (FSP) participation and body mass index (BMI) for low income individuals whose per capita family income falls in the bottom two quintiles. We estimate changes in the dispersion of the entire distribution of BMI following FSP participation using a quantile regression model in both cross-sectional and longitudinal analyses. For women, we find that the mean OLS estimate of FSP participation underestimates the extent of the positive association with BMI at the top quantiles in both cross-sectional and longitudinal individual fixed effects models. Controlling for individual fixed effects in the quantile regression model reduces the estimated magnitude of the association by a factor of three to four, although the estimates remain statistically significant for women. For men, a marginally statistically significant positive association of FSP participation with BMI is found at the top quantiles compared to no statistically significant mean estimate although the association is no longer statistically significant when time-constant individual heterogeneity is adjusted for in the individual fixed effect models.     

Who Has the Time? Community College Students’ Time-Use Response to Financial Incentives

We evaluate the effect of performance-based scholarship programs for post-secondary students on student time use and effort and whether these effects are different for students we hypothesize may be more or less responsive to incentives. To do so, we administered a time-use survey as part of a randomized experiment in which community college students in New York City were randomly assigned to be eligible for a performance-based scholarship or to a control group that was only eligible for the standard financial aid. This paper contributes to the literature by attempting to get inside the “black box” of how students respond to a monetary incentive to improve their educational attainment. We find that students eligible for a scholarship devoted more time to educational activities, increased the quality of effort toward and engagement with their studies, and allocated less time to leisure. Additional analyses suggest that students who were plausibly more myopic (place less weight on future benefits) were more responsive to the incentives, but we find no evidence that students who are arguably more time constrained were less responsive to the incentives.

     

松下幸之助的传奇

年轻的他家境贫寒,为了养家糊口而到一家大电器公司求职。矮小瘦弱,又破又脏的他被公司的人事部门主管谢绝了：＂我们现在暂时不缺人,你一个月以后再来看看吧。＂     

低碳生活 智慧选择 澳柯玛变频冷柜节能30%

在前不久结束的美国智力竞赛节目《危险边缘》人机对战中,IBM超级计算机系统＂沃森＂战胜了人类冠军,继＂深蓝＂之后,再一次将人工智能推向新的阶段,彰显了科学技术本身无以伦比的魅力。     

大众：最年轻的德国“汽车”

大众汽车公司是德国最年轻的、同时也是德国最大的汽车生产厂家。作为目前德国最大的企业,2010年大众打败日本丰田、美国通用汽车公司成为世界最大汽车公司。其在世界500强排行榜中的排名由2010年的16位升至2011年13位,是德国排名最靠前的品牌。     

When it pays to have a friend on the inside: contingent effects of buyer advocacy on B2B suppliers

As organizational buying systems grow more complex and sophisticated, suppliers increasingly rely on buyer advocacy: an individual buyer’s efforts to influence his/her colleagues such that the supplier’s standing is improved. Drawing from cognitive response theory, the authors hypothesize an inverted U-shaped relationship between a buyer’s advocacy for a supplier and the customer’s purchases from that supplier. They theorize that this effect is moderated by the advocate’s industry experience and customer–supplier relationship characteristics. An analysis of multisource data from a B2B service provider (Study 1) supports the predicted inverted U-shaped relationship, while a unique dataset from a large industrial supplier (Study 2) provides broad support for the hypothesized moderators. Finally, a randomized experiment (Study 3) replicates key findings and corroborates the theorized cognitive response mechanisms. Findings contribute to the limited literature on buyer advocacy within the organizational buying domain and offer practical implications for suppliers and buyers.

     

Visibility in the workplace: still an essential ingredient for career success?

This article explores the extent to which a variety of different absences from the workplace affect perceptions of employee commitment and loyalty, and ultimately, how this ‘temporary invisibility’ might affect career success. Data were derived from 40 interviews (12 women and 28 men) in a public sector agency in Australia. Findings reveal that absences attract substantial career penalties for many employees, not only in relation to gendered flexible work options such as part-time employment and parental leave, but also traditionally uncontested entitlements such as annual and long service leave.