你有苹果精神吗？

开封以后换成翻新机或者iphone3，再把包装复原，出手俨然是一部全新的iphone4行货。这是9月30日凌晨，在西单大悦城的苹果旗舰店门口，几十名黄牛交流的业务经验。太可恶了!更可恶的是排队，今天苹果店放宽政策，由每人限买2台增加至5台。     

打破面食忌的传说

＂就算地球明天毁灭,也别想让我吃包子!＂我前言不搭后语地反抗着＂吃包子＂的提议。＂为什么不喜欢？＂朋友忍无可忍。＂因为有馅儿,还有皮儿。＂我支吾着,并不明白自己究竟怎么想。＂饺子也有馅有皮啊。＂＂我那是凑合着吃,况且包子是发面,蒸出来湿乎乎的。＂     

Deprivation index for small areas in Spain

The term deprivation is often used to refer to economic or social shortages in a given geographical area. This concept of deprivation has been identified for years using simple indicators such as income level, education and social class. One of the advantages of using simple indicators is the availability of data, since they come directly from sources of information like censuses and population registers. However, the main disadvantage of these indicators is their limited usefulness when measuring a concept as complex as deprivation with a single variable. One possible solution to this problem is using compound indices, made up of a combination of simple indicators. For years, the concept of material deprivation in Spain has been measured using indices or indicators imported from other countries. However, there are no studies that investigate if all of these variables are really related to material deprivation in Spain. In this context, the objective of this study is to create a synthetic index for material deprivation for the municipalities in Spain, bearing in mind the variables available from the Population and Housing Census. The index was built on a principal components factor analysis. The analysis showed two factors. The first factor showed a high positive correlation to the variables relating to illiteracy rate, unemployment rate and percentage of manual labourers, while the second factor was seen as highly positively correlated to the variables relating to the percentage of homes without access to a vehicle and the dependency index and also correlated, though negatively, to the percentage of foreigners between 16 and 49 who lived abroad in 1991. The variables that make up the first factor can be considered to be an approximation of the concept of deprivation in Spain. This study proposes a deprivation index made up of three simple indicators available from national information sources: percentage of illiteracy, percentage of unemployment and percentage of manual labourers. With this index, the criteria for measuring deprivation in Spanish municipalities can be unified and a comparison of the results of the different studies in our context facilitated.     

A Central Limit Theorem in Non‐parametric Regression with Truncated,Censored and Dependent Data

On the basis of the idea of the Nadaraya–Watson (NW) kernel smoother and the technique of the local linear (LL) smoother, we construct the NW and LL estimators of conditional mean functions and their derivatives for a left‐truncated and right‐censored model. The target function includes the regression function, the conditional moment and the conditional distribution function as special cases. It is assumed that the lifetime observations with covariates form a stationary α‐mixing sequence. Asymptotic normality of the estimators is established. Finite sample behaviour of the estimators is investigated via simulations. A real data illustration is included too.