Nowadays, when companies are dealing with severe global competition, they are making serious investments in Customer Relationship Management (CRM) strategies. One of the cornerstones in CRM is customer churn prediction, the practice of determining a mathematical relation between customer...

The note examines a generalization of a theorem of Bortkiewicz which relates the difference between a Paasche and a Laspeyres price index to a covariance between price and quantity relatives. The generalized theorem is used to demonstrate a number of interesting special applications. It turns...

This paper develops the methodology and makes the estimation to measure the importance of the Brazilian supermarket complex to employment and income generation in the Brazilian economy in the 1990’s. To do so, input-output matrices are constructed for the years of 1990, 1995 and 1999, where...

The rank-ordered logit model's coefficients often vary significantly with the depth of rankings used in the estimation process. The common interpretation of the unstable coefficients across ranks is that survey respondents state their more and less preferred alternatives in an incoherent manner....

Voting features based classifiers, shortly VFC, have been shown to perform well on most real-world data sets. They are robust to irrelevant features and missing feature values. In this paper, we introduce an extension to VFC, called voting features based classifier with feature construction,...

The aim of this paper is to make imputation of earnings in observations with missing values in the Encuesta Nacional de Ocupaciones y Empleo (ENOE), and also to analyze a possible bias in human capital estimations from ignoring such missings. We present imputations by two methods, and also a...

This paper examines the role of rising housing prices and borrowing constraints as determinants of China's high household saving rate, especially among young households. Using a life-cycle model of saving behavior in the presence of borrowing constraints, we show that the relationship between...

A common problem in the empirical production analysis at the firm-level is that the initial values of capital are often missing in the data. Most empirical studies impute initial capital according to some ad hoc criteria based on a single arbitrary proxy. This paper evaluates the bias of...

The introduction of the National Rural Health Mission has increased the demand for micro-level data on population and health for use in monitoring, planning and programme implementation. This calls for the introduction of a Health Management Information System (HMIS). The launching of a national...