TESTS FOR SEASONAL DIFFERENCING WITH AN UNKNOWN BREAK-POINT

Some Lagrange multiplier tests for seasonal differencing are proposed; their main objective is to avoid over-differencing due to structural change. The null hypothesis is either the presence of both regular and seasonal unit roots or the presence of a seasonal unit root. Alternative hypotheses allow for stationarity around a possible structural change where the break-point is unknown. The location of the structural change is estimated using the proposed procedures, the asymptotic distribution of the test statistics under the null hypothesis is derived and some useful percentiles are tabulated. An illustrative example based on the Canadian Consumer Price Index is presented.     

农资经销商的转型及其动因分析——基于豫县的实地调研

农资经销商在涉农事业单位改革中产生,在农业市场化改革的推进中兴起并急剧分化,在新型农业经营体系构建中转型发展,其角色功能与市场行为呈现出鲜明的阶段性特征,其转型动力源于政府的改革导向、市场竞争机制的牵引、本身的理性、农业经营主体变化等因素的共同作用,其转型发展需要有效发挥政府权威性主体的统合功能。     

企业刑事合规的路径思考

刑事合规的初衷是预防和监控单位内部违法犯罪行为,目前已经全面进入我国理论与实践的视野。企业刑事合规对于企业犯罪预防与治理具有重要意义,可以凸显企业在犯罪预防实践中的主体地位,有效缓解刑事法对企业犯罪惩治的不利影响。但是,刑事合规理论与实践面临诸多困境。从国际上看,存在着有效刑事合规标准不统一、无法满足全覆盖要求、刑事合规负面影响遭忽视等问题;从国内来看,存在着组织体责任冲击传统的单位刑事责任认定、企业合规刑事激励制度试点不顺畅等问题。当前,应当通过构建相对统一的合规标准、适当调整合规计划具体要求、切割单位与成员的刑事责任等措施,构建具有中国特色的合规不起诉制度。     

Six for Lunch: A Dining Option for Residents with Dementia in a Special Care Unit

Recent research has focused on the design of special care units for residents with dementia, often identifying the social benefits of residentially scaled kitchen and dining areas. This qualitative case study examines how the environmental design features of two dining settings in one special care unit impact residents’ patterns of socialization and interaction at meal times. The first setting is a central dining room for 50 to 60 residents. The second setting is a small office with a residentially scaled kitchen, where once a week, the activity director invites six residents for lunch once a week. Within an ecological theoretical framework, the study findings reveal that, while mealtimes in both settings are highly anticipated, it is the complex relational ties between the operational, managerial, and environmental features of the settings which determine residents’ social interaction and satisfaction with their mealtime experiences.     

语义期待的产生条件及其作用

语义期待是受话人对即将读到(听到)的语义信息产生的心理期待.它是受话人在话语理解过程中利用背景知识、自己对当前文字和言语情景的认识而形成的.其作用涉及到话语信息加工理解的各个层次,使话语字面意义的理解呈现出词汇、句子、语篇三个平面的加工相互制约、相互补充的特点.正确的语义期待可以消除模糊、弥补缺漏、补足省略、纠正错误,对于提高人脑感知和加工话语信息的速度具有普遍意义.错误的语义期待则会干扰语义理解甚至导致误解.     

“亂”是{治}{乱}同词吗

相反的两个义位如果不属于同一个词位（词）,就不能看作是反训现象,因为＂词＂这个语言学概念是从共时同一性角度来确定的。{治}{乱}两个义位有不同的来源,语音形式也不相同,虽然它们后来采用了同一个字形,却代表了不同的词,因而＂亂＂不是{治}{乱}同词,不是反训词。     

LR cointegration tests when some cointegrating relations are known

This paper considers the asymptotic analysis of the likelihood ratio (LR), cointegration (CI) rank test in vector autoregressive models (VAR) when some CI vectors are known and fixed. It is shown that the limit law is free of nuisance parameters. In the case of LR tests against the alternative of completely unrestricted CI space, the limit law can be expressed as the convolution of known distributions. This deconvolution is employed to approximate the quantiles of the distribution, without resorting to new simulations.     

Discharge Planning Process on a General Psychiatry Unit

Abstract

This study investigates the discharge-planning process and short-term outcomes for 100 patients discharged from a general psychiatry unit. The contributions of functional/illness factors, personal factors, and family factors to communication of the plan, length of stay, and satisfaction with discharge-planning process were investigated. Findings indicate that both the process and short-term outcomes of discharge planning are affected by factors that can be addressed in interventions with patients, families and the social environment. This research suggests that discharge planning without attention to psychosocial factors will fail to address issues relevant to patient well-being.     

ASYMPTOTIC DISTRIBUTIONS OF SEASONAL UNIT ROOT TESTS: A UNIFYING APPROACH

ABSTRACT

This paper adopts a unified approach to the derivation of the asymptotic distributions of various seasonal unit root tests. The procedures considered are those of Dickey et al. [DHF], Kunst, Hylleberg et al. [HEGY], Osborn et al. [OCSB], Ghysels et al. [GHL] and Franses. This unified approach shows that the asymptotic distributions of all these test statistics are functions of the same vector of Brownian motions. The Kunst test and the overall HEGY F-test are, indeed, equivalent both asymptotically and in finite samples, while the Franses and GHL tests are shown to have equivalent parameterizations. The OCSB and DHF test regressions are viewed as restricted forms of the Kunst-HEGY regressions, and these restrictions may have non-trivial asymptotic implications.     

一种立式回转台钻孔专机的设计

介绍了一种加工Buick轿车无级变速离合器总成中二档轴零件的立式回转台钻孔专机的结构、夹具及气动控制原理 ,其效率高于钻模加工 ,且加工精度稳定