Repurposing Materials and Waste through Online Exchanges: Overcoming the Last Hurdle

Online material and waste exchanges (OMWEs) provide online channels to repurpose by‐products, unused materials and waste from industrial and commercial facilities. Unfortunately, OMWE's also have challenges. First, sellers may have access to other disposal options and, as a result, may not fully commit to the exchange. Second, buyers can face high uncertainty about the product exchanged and the transaction being undertaken. Overcoming these challenges is the “last hurdle” to making OMWEs successful. This study investigates the factors that reduce the buyers' uncertainty and increase the sellers' commitment to the OMWE. We analyze novel transaction‐level data from an online exchange (MNExchange.org) combined with other archival public records on county‐level repurposing and disposal statistics. First, we find that regional repurposing policies and alternatives have a complementary effect on sellers' commitment toward OMWEs, resulting in increased OMWE exchanges. However, regional disposal policies and alternatives have a substitution effect on sellers' commitment, resulting in reduced exchange success. Further, greater product and transaction information reduce the buyer's uncertainty and increase exchange success. Finally, the analysis shows that users' (buyers and sellers) heavily rely on their prior experience with OMWEs. Specifically, higher familiarity between the buyer–seller pair and familiarity with the OMWE system leads to higher likelihood of exchange success. This study lays the foundation for understanding OMWEs and has important implications for developing policies and operations to increase online transactions of by‐products, materials and wastes.     

Preliminary evaluation of contingent meals and telephone use to improve evidence-supported family therapy session attendance in mothers referred by Child Protective Services for substance abuse

Persons referred by Child Protective Services (CPS) for substance abuse evidence high rates of nonattendance to therapy sessions, taxing systems of care and exacerbating outcomes. This study examined the influence of two telephone-based incentive programs on therapy session attendance in mothers who were referred by CPS for substance abuse. After baseline therapy session attendance was established in an evidence-based clinic that incorporated a telephone engagement intervention (Phase I), participants were provided free cellular telephones with limited minutes and permitted to order free meals delivered by the therapist during upcoming sessions (Phase II). The third phase was similar to Phase II, but participants were provided unlimited minutes. Results indicated that participants’ attendance was significantly improved when meals and cellular telephone minutes were contingent on attendance. Although the percentage of sessions attended by participants during Phase III was higher than Phase II, unlimited minutes and meals did not significantly enhance attendance relative to limited minutes and meals. Session attendance for significant others of these participants was significantly higher during Phase III as compared with Phase I. Session attendance of significant others was statistically similar between Phase I and II and between Phase II and Phase III. Study implications and recommendations for future research and practice are discussed in light of the findings.     

The Impact of Learning and Labor Attrition on Worker Flexibility in Dual Resource Constrained Job Shops

This study investigates the impact of worker learning, worker flexibility, and labor attrition on the system performance of a dual resource constrained (DRC) job-shop. The effects of learning and labor attrition have not been previously addressed in DRC literature. Results from the study, consistent with previous literature, show that the greatest benefits are achieved when inter-departmental worker flexibility is incrementally introduced into the system. In addition, the learning environment, which depends on the initial processing time of jobs and the learning rates of workers, is shown to impact the acquisition of flexibility. The study also shows that the impact of labor attrition on system performance under certain shop conditions may be significant.     

Relating supply performance to aircraft availability

This paper describes how the effectiveness of the supply of vital repairable items for an aircraft or weapon system can be measured in terms of the expected number of aircraft grounded because of supply shortages. The properties of this measure are compared with the three alternative methods of assessing supply performance, none of which are directly aircraft or weapon system related. The present applicability of this measure to various situations at RAF Squadron and station level are discussed, together with possible future areas of application.     

盐酸多奈哌齐治疗血管性痴呆的临床疗效观察

目的观察盐酸多奈哌齐治疗血管性痴呆的疗效。方法102例血管性痴呆患者随机分为2组，治疗组51例，在常规治疗的基础上给予盐酸多奈哌齐5mg，每日1次；对照组54例，给予常规治疗，两组患者疗程均为12周，观察治疗前后认知功能（MMSE、HDS）及日常生活自理能力（ADL）的改善程度。结果治疗12周时，治疗组MMSE、HDS及ADL评分明显改善，较对照组有显著性差异（P〈0．05），自身对照结果显示，盐酸多奈哌齐治疗12周，治疗后MMSE、HDS及ADL评分较治疗前改善（P〈0．01），在治疗4周时，MMSE、HDS及ADL评分已有提高。结论盐酸多奈哌齐治疗血管性痴呆疗效确切，对患者认知功能及日常生活能力均为改善，无明显副作用，值得临床推广。     

A social capital approach to the prevention of elder mistreatment

The current demographic landscape features an increasing number of elderly individuals in the care of some trusted other. Being cared for by a trusted other raises the potential for mistreatment of the elder by that trusted other. The goal of this paper is to explore the possibility of preventing elder mistreatment by increasing the bridging and bonding social capital available to caretakers. Attending to social capital lets researchers expand their focus toward areas rarely examined through current stress-outcome models (e.g., interpersonal interactions). First, elder mistreatment and social capital are defined and discussed. Then, a model is forwarded that details how social capital might mitigate the effects of caretaker stress and decrease the probability that caretakers will engage in elder mistreatment in both home and long-term care institutional settings. Finally, implications for future research and practical intervention are discussed.     

Central bank independence, economic freedom, and inflation rates

Measures of central bank independence combine many attributes that may or may not affect inflation. Central bank attributes are chosen as a result of political calculations over the distribution of resources between competing interest groups. Simultaneity bias results from regressions of central bank independence or of economic and political freedom on inflation or growth. Our estimates demonstrate the connections between economic and political freedom and central bank attributes that lead to inflation. Countries showing high degrees of economic freedom adopt structures that lead to lower inflation; those that show high degrees of political freedom do not adopt inflation-reducing institutional structures.     

Unionization and nonunion wage patterns:

conclusion We argue that a nonunion worker’s support for unionization depends not only on the expected gain in wages, but also on the probability of retaining employment after union-ization. Incorporating this point generates no prediction that low-wage workers will receive the largest threat-induced supplements as they are the ones who are least likely to retain their jobs after unionization. In short, which group of workers will receive the largest union induced wage supplement is ambiguous.