Some statistical issues in weather experimentation

A number of topics of statistical methodology in weather modification are discussed. The time sequence of unit definition, classification and randomization is shown to affect the types of units that can be used validly, and this casts doubt on the value of blocking. Re-randomization (permutation) tests are recommended as the only reliable method of confirmatory inference for weather experiments. Some aspects of such tests are examined, including a procedure for multiple comparisons. The plague of multiplicity of tests is discussed and warned against. Doubts about cumulative evaluations of "all" experiment's are expressed. A case is argued for examination of some non-randomized seeding operations. Consid¬ering the dearth of randomized data, it is argued that careful evaluation of seeding operations should be undertaken.     

Canonical correlation analysis in the definition of weight restrictions for data envelopment analysis

This work investigates the use of canonical correlation analysis (CCA) in the definition of weight restrictions for data envelopment analysis (DEA). With this purpose, CCA limits are introduced into Wong and Beasley's DEA model. An application of the method is made over data from hospitals in 27 Brazilian cities, producing as outputs average payment (average admission values) and percentage of hospital admissions according to disease groups (International Classification of Diseases, 9th Edition), and having as inputs mortality rates and average stay (length of stay after admission (days)). In this application, performance scores were calculated for both the (CCA) restricted and unrestricted DEA models. It can be concluded that the use of CCA-based weight limits for DEA models increases the consistency of the estimated DEA scores (more homogenous weights) and that these limits do not present mathematical infeasibility problems while avoiding the need for subjectively restricting weight variation in DEA.     

转变就业观念 面向基层就业

自1999年高校扩招以来,大学生就业问题日益严峻,面对拥挤的就业市场,大学毕业生应该转变就业观念。进一步树立“到农村去,到基层去,到人民最需要的地方去”的就业意识。这也将为高校毕业生提供很好的就业机会。     

基于SE—DEA的电力企业效率评估

针对传统数据包络分析(DEA)模型不能对有效决策单元做进一步比较的现实情况,文章引入了重新定义生产可能集的SE-DEA模型,创造性地克服了传统模型的这一缺点,实现了对所有决策单元的充分评价与排序.接着以沪深股市火力发电上市公司为例进行实证,在论证它们符合SE-DEA模型应用假设条件的基础上,验证了该模型在评价企业效率方面的有效性.     

论我国公益性社会事业治理模式的重建

我国公益性社会事业的治理仍是社会事业体制改革的焦点问题.市场经济体制下,政府要改变管办一体的社会事业治理模式,对国有社会事业组织要行使所有者职能,对所有社会事业组织行使管理者职能.为加强对事业单位的管理,有必要设立专门的具有较高权威性的社会事业治理机构.公益性社会事业组织要建立起以董事会或理事会为架构的法人治理结构,而营利性的事业单位要逐步实行改制和公司化治理.