Intrinsic and extrinsic drivers of yard vegetation in urban residential areas: implications for conservation planning

Residential green areas often represent a significant portion of a city’s green infrastructure which has generated great interest in studying the factors that contribute to the formation of plant associations in residential yards. This project evaluated the external factors to the household social-ecological system that influence the availability of plants for residential landscapes and how they may influence the presence of native plants in residential yards on households within the Río Piedras watershed in the metropolitan area of San Juan, Puerto Rico. The methods used included a residential survey with open and closed questions that addressed the sources of plants used in landscaping and an evaluation of ornamental plant species inventories from local nurseries. A total of 432 yards were surveyed. Yard plants in this watershed have multiple sources. Aside from obtaining plants at local nurseries, natural dispersion, exchanges among family and friends and historical plantings can be just as important sources of yard plants. Our results also suggest that the majority of residents do not know where to get native plants which could represent a challenge for the development and implementation of initiatives for natives gardening. At the same time, most commercial nurseries have a deficit of native plants in their inventories. This information is critical to species conservation strategies that seek the inclusion of urban residential areas and may help improve initiatives about the involvement of individual citizens in sustainable gardening practices at the residential scale.     

Addictive Substances,Users’ Health,and the Government’s Perceived Responsibility: French People’s Perspective

This paper uses a semiparametric latent variable transformation model for multiple outcomes to examine the effect of education and maternal education on female multidimensional well-being and proposes a procedure to build a well-being index that is less susceptible to functional form misspecification. We model multidimensional well-being as an unobserved common factor underlying the observed well-being outcomes. The semiparametric methodology allows us to alleviate misspecification bias by combining multiple indicators into a latent construct in an unspecified, data-driven way. Using data from female participants of the 1974–2010 waves of the US General Social Survey, we find that education, intelligence, and maternal education contribute positively to multidimensional well-being. However, the effects of education and maternal education on female multidimensional well-being declined steadily between the mid-1970s and the 1990s, and have not rebounded since.     

Contracting in a Supply Chain with Stochastic Demand and Substitute Products

Retailers often stock competing products from multiple manufacturers. When the retailer stocks out of a particular item, customers who prefer the item are likely, with some probability, to switch to a substitute product from another manufacturer at the same store. In such an event, a “lost sale” for the manufacturer is not a “lost sale” for the retailer. This exacerbates differences in manufacturer's and retailer's stockout costs for the item. Such differences in stockout cost influence the optimal contract between the manufacturer and the retailer and also impose agency costs on the channel. Such contracts, in turn, determine equilibrium inventory levels and fill rates. We study these issues in a single‐period supply chain, consisting of a manufacturer and a retailer, under three different scenarios (when the two firms are integrated into a single entity, when the retailer makes stocking decisions, and when the manufacturer makes stocking decisions). We compare, and present a methodology for comparing, stocking quantities, manufacturer efforts, and supply chain profits across different scenarios. We find that VMI performs better when manufacturer effort is a substantial driver of consumer demand and when consumers are unlikely to substitute to another brand in case of a stockout. On the other hand, if non‐contractible manufacturer effort is unimportant, or when substitution is significant, VMI can exacerbate, rather than mitigate, channel inefficiencies, and can perform worse than traditional Retailer Managed Inventory.     

Cross-National Coverage of HIV/AIDS: A Community Structure Approach

Community structure analysis compared cross-national coverage of responsibility to fight HIV/AIDS in newspapers in 18 countries, selecting articles of 250+ words from May 7, 2003, to September 13, 2013. The resulting 291 articles were coded for “prominence” and “direction” (“government,” “society,” including nongovernmental organizations [NGOs]/foreign aid or “balanced/neutral” coverage), and combined for composite scores in each newspaper's “Media Vector” (range = .4974 to ?.1465). Newspaper support for governmental versus societal involvement was 9 to 9 (50/50). Pearson correlations revealed significant relationships in privilege and vulnerability categories: public knowledge of HIV/AIDS preventative measures and general health of the population. Regression of national characteristics against Media Vectors yielded percentage of women who know condom use prevents HIV (63.7% of variance), percentage of men who know condom use prevents HIV, and percentage of population undernourished, collectively totaling 84.8% of variance, all correlated with support for government intervention. A second regression analysis excluding self-report variables found that “% population undernourished” and “% females in the workforce” (combined 52.8% of variance) were linked to coverage supporting government responsibility. “AIDS incidence” (13.6% of variance) was linked to support for “societal” intervention. Most of the variance was linked to coverage supporting government responsibility for HIV/AIDS.     

Lay Conceptions of Well-Being and Rules Used in Well-Being Judgments Among Young,Middle-Aged,and Elderly Adults

The present study deals with lay conceptions of well-being and its main determinants, and the rules used by everyday people to assess the well-being of others based on various pieces of information. The results showed that (a) most proposed definitions of well-being refer to the family, the physical body, and acceptance of oneself and one's situation; (b) the factors with the greatest impact on judgments of the well-being of others are health, harmony with spouse, harmony with children, self-acceptance, positive relations, purpose in life, and personal growth; (c) the above findings apply to respondents of all ages; and (d) the information integration rule for estimating the level of the well-being is essentially additive.     

La participación en los grupos sociales: elaboración de un sistema mediante ordenador para su análisis y control (A.C.P.)

Resumen

La finalidad de este informe es proporcionar datos sobre un nuevo instrumento para la observación de grupos y posibles aplicaciones.