The Differential-Productivity Hypothesis and Purchasing-Power Parties: Some New Evidence*

The structure of prices of goods entering into international trade relative to those that do not plays a key role in the Balassa-Samuelson explanation of why countries ‘exchange rates differ systematically from their currencies’ purchasing power. the B-S analysis leads to the proposition that the tradable-nontradable price difference is lower for rich countries than for poor. This paper examines the gap, using prices collected by the International Comparison Programme. A variety of regressions were run to see if indeed the difference between tradable and nontradable price parities moved with income in the way B-S expected. They did.     

Time Series Data Mining with an Application to the Measurement of Underwriting Cycles

Underwriting cycles are believed to pose a risk management challenge to property-casualty insurers. The classical statistical methods that are used to model these cycles and to estimate their length assume linearity and give inconclusive results. Instead, we propose to use novel time series data Mining algorithms to detect and estimate periodicity on U.S. property-casualty insurance markets. These algorithms are in increasing use in data science and are applied to Big Data. We describe several such algorithms and focus on two periodicity detection schemes. Estimates of cycle periods on industry-wide loss ratios, for all lines combined and for four specific lines, are provided. One of the methods appears to be robust to trends and to outliers.     

‘ARE WE JUST KILLING PEOPLE?’: Centering Racial Capitalism in the Green Gentrification of the Atlanta BeltLine

In this article I argue that any analyses of the manifestations of urban natures within urban political ecology must center racial capitalism as a theoretical framework and account for how these manifestations, which rely upon the co-constitutive workings of race and nature, reproduce anti-Blackness and unequal productions of space. I engage urban frontier imaginative geographies as a lens through which to view the ongoing regimes of dispossession within the historical context of the founding of what is today known as Atlanta and the contemporary greening project of the Atlanta BeltLine. Race and nature intersect to function as instruments of power and converge in the spaces of the Atlanta BeltLine to (re)produce an urban green frontier.     

Democracy and trade: an empirical study

The theoretical discussion on globalization has suggested that there are linkages between democracy and trade, although the direction of influence is less certain. Formal empirical studies remain scarce, and have often focused on the question of whether democratic regimes influence trade policy, as opposed to the actual relationship between democracy and trade. This paper seeks to answer the question, “Do democracies trade more?” by applying the gravity equation to a large dataset of bilateral trade data for the period 1948–1999, while taking into account the role of democracy. It finds that democracy is positively related to trade flows, but only after controlling for trade pair heterogeneity. In addition, it makes the case for studies of this nature to draw a distinction between trade flows in the pre- and post-1990s period of rapid democratization as well as between developed and developing countries.     

强生：成功的五大秘诀

今年,你的公司是否感到举步维艰？也许,有个消息能让你好过一些——强生今年的日子也很艰难。到底有多难呢？虽然还不太确定,但是看起来,2009年的销售额会下降。这是1976年以来从未出现过的情况。     

You eat “like a girl”: gender differences in content and effects of food advertising depicting sports

Research to date is just beginning to examine the nature and impact of portrayals of physical activity on children’s attitudes in the marketing literature. The following two-part study therefore examines gender differences in the content and effects of food advertising depicting physical activities among children. Study one presents a content analysis of food advertisements shown during children’s television programming, revealing that healthy foods are associated with females while healthy activities are associated predominantly with males. Study two then examines children’s responses to an advertisement for an unhealthy food that portrays both male and female characters engaged in physical activities. Gender differences appeared to be the result of males’ greater belief that a junk food can aid in one’s physical abilities, leading them to hold greater intentions to engage in physical activity as compared to females and males who viewed an ad without physical activity.     

Cost-effectiveness of a chronic pain intervention for people living with HIV (PLWH)

Background: Chronic pain is a common, disabling, and costly comorbidity, particularly in people living with HIV (PLWH). This study developed and pilot tested a pain self-management intervention for chronic pain tailored to PLWH called Skills TO Manage Pain (STOMP).

Objectives: Given the additional resources needed to deliver STOMP in HIV clinical settings, an important objective of the pilot study was to assess not only STOMP’s preliminary efficacy, but also its cost-effectiveness.

Research design and subjects: The present study draws from a 44-participant, 2-arm randomized pilot trial of the STOMP intervention vs usual care among PLWH and at least moderate chronic pain (Clinicaltrials.gov: NCT02824562). Cost-effectiveness is presented as the incremental cost-effectiveness ratio (ICER). Costs were considered from the clinic perspective over a 1-year time horizon using real costs from the pilot trial. It was conservatively assumed there would be no costs savings. The Standard Gamble (SG) method was used to directly measure utilities.

Results: Thirty-six participants met inclusion criteria for the present analyses. Mean age was 52 years; 61% were female and 86% were black. The total cost of STOMP was $483.83 per person. Using the SG method, the change in QALYs was 0.15, corresponding to an ICER of $3,225.

Conclusions: STOMP’s cost/QALY is substantially lower than the $50,000 to $100,000/QALY benchmark often used to indicate cost-effectiveness. Although based on a pilot trial and, therefore, preliminary, these findings are promising, and suggest the importance of cost analyses in future STOMP trials.     

The Trade Boards Act of 1909 and the Alleviation of Household Poverty

This article examines the effects of the 1909 Trade Boards Act on women's wage rates and income contributions to poor households. The Act established boards charged with setting minimum hourly wages in selected low-paid trades, and the majority of workers affected before the First World War were women. Many of the women whose wages were raised by the Act were the wives and daughters of low-skilled workers, while many others were sole earners who supported children or elderly parents. Our main finding is that the Trade Boards Act was effective in reducing household poverty rates among the women whose wages it would have increased.