A computational general equilibrium approach to the shadow pricing of trade restrictions and the adjustment of the exchange rate, with an application to Argentina

A general equilibrium model of an open economy in which there are ad valorem texes on domestic production and export activities, and import activities are subject to both tariffs and quotas is constructed. A domestic monetary asset, foreign exchange, and a corresponding nominal exchange rate are introduced and a numerical example of the model is constructed. The example is solved via the Scarf fixed point algorithm, first with taut quotas and then after having relaxed quotas. Various price indices are then used to guide programs designed to stabilize the trade balance against the quota liberalization. An empirical example, using Argentine data, is carried out to find the quota equivalent of a particular tariff.     

Autism: understanding conceptual processing deficits

Autism is a behavioral diagnosis characterized by a triad of impairment, which includes impaired communication, impaired social skills, and impaired spontaneity. The outward behavior exhibited by people with autism represents a different cognitive processing style than that seen in typical development. Understanding the way people with autism process and store information is important for intervention. The majority of people diagnosed with autism do not have symptoms of mental retardation and need access to mainstream services to work on the problems presented by daily life.     

The interaction of aging and 10 years of racing on ultraendurance running performance

The aim of this study was to examine the interaction between aging and 10 years of racing in endurance runners. Race-time data from 194 runners who had completed 10 consecutive 56-km ultramarathons were obtained. The runners were either 20.5 +/- 0.7, 30.0 +/- 1.0, 39.9 +/- 0.9, or 49.4 +/- 1.0 years old at their first race. Each runner's race speed was determined for each race over the 10 years. Data were analyzed using repeated-measures ANOVA, one-way ANOVA, and independent t tests and showed that performance improved and declined at greater rates for younger runners; younger runners had a greater capacity for improvement than older runners; approximately 4 years were required to reach peak racing speed, regardless of age; it was not possible to compete at peak speed for more than a few years; and the combined effects of 10 years of aging and racing neither improve nor worsen net performance. In conclusion, these data suggest that although these runners showed similar patterns of change in race speed over a 10-year period, the extent of change in performance was greater in younger than in older runners.     

Approximation of power in multivariate analysis

We consider the calculation of power functions in classical multivariate analysis. In this context, power can be expressed in terms of tail probabilities of certain noncentral distributions. The necessary noncentral distribution theory was developed between the 1940s and 1970s by a number of authors. However, tractable methods for calculating the relevant probabilities have been lacking. In this paper we present simple yet extremely accurate saddlepoint approximations to power functions associated with the following classical test statistics: the likelihood ratio statistic for testing the general linear hypothesis in MANOVA; the likelihood ratio statistic for testing block independence; and Bartlett's modified likelihood ratio statistic for testing equality of covariance matrices.     

Relations Between Social Problem Solving and Indicators of Interpersonal and Family Well-Being Among Chinese Adolescents in Hong Kong

This study evaluated the dimensionality of the construct of social problem solving and examined the relationships between social problem solving and empathy, emotional well-being and family well-being in a sample of secondary school students in Hong Kong (N=1462). The participants completed measures of social problem solving (the 25-item short form of the Chinese version of the Social Problem-Solving Inventory: C-SPSI-R), empathy (the Chinese Interpersonal Reactivity Scale), emotional well-being (the Chinese Vengeance Scale) and family well-being (the Chinese Family Assessment Instrument and the Conflict Behaviour Questionnaire). Regarding the dimensionality of the C-SPSI, confirmatory factor analysis showed that the scale has a stable five-factor structure (RMSEA=0.05) and that the related subscales were reliable (with ranging from 0.65 to 0.81). Participants with higher levels of social problem solving had higher levels of empathy and lower personal distress in applying empathy, which suggested that these personal competencies were inter-related. Higher levels of social problem solving were also related to better emotional well-being (less tendency to take revenge) and better family quality of life (better family functioning and fewer parent-adolescent conflicts).     

Does the Therapeutic Relationship Matter? A Follow-up Study of Adherence and Improvement in Family Therapy

A follow-up study of 83 families treated by family therapy at a child guidance clinic was conducted and the relation of client/therapist interaction to (i) drop out from therapy and (ii) improvement was examined. Early terminators were found to differ significantly from continuers as to their ratings of their relationship with the therapist, and trends were found for therapists' feelings to be associated with adherence to therapy. Early terminators were not distinguished by diagnosis, severity of case, or improvement rating. Improvement, on the other hand, was not associated with therapists' or clients' attitudes to each other. It is suggested that these factors are of greater significance in “joining” therapy than in its course.     

俄罗斯进军科技产业

曾押注Skype和Facebook的硅谷风投家又开始考虑另一个心跳赌局——让俄罗斯多样化发展,摆脱对石油产业的依赖。俄罗斯总统德米特里．安．梅德韦杰夫已将经济多样化摆到其经济政策的核心位置,并开始在莫斯科郊区建造一个被称为俄罗斯硅谷的大型科技园。     

Mass Customization in the Automotive Industry: Comparing Interdealer Trading and Reconfiguration Flexibilities in Order Fulfillment

Mass customization has been viewed as desirable but difficult to achieve in the volume automotive sector. Here we consider flexibility in automotive order fulfillment systems to enhance the ability to satisfy customers with their desired vehicle variants within acceptable delivery lead times. Two types of flexibility are compared in a Virtual‐Build‐to‐Order system—reconfiguration in the planning pipeline and interdealer trading. A representative simulation model is used to investigate the impact of the two types of flexibility across a wide spectrum of product variety levels. The impacts on major stakeholders in the system—the producer, dealers, and customers—are considered. The study shows that both types of flexibilities can bring significant benefits in terms of reductions in lead time and inventory holding. The level of product variety strongly influences the observed effects—an important finding in the mass customization context. Upstream reconfiguration flexibility brings greater benefits than downstream trading flexibility. Reconfiguration tends to dominate trading as a fulfillment mechanism when both are in operation. The findings have implications for the design and management of automotive order fulfillment systems in improving their ability to offer mass customization. The study has relevance for companies in other sectors with high levels of variety that seek to combine efficiency, speed, and flexibility in order fulfillment.