Code metrics collected at the method level are often aggregated using summation to capture system properties at higher levels (e.g., fileor package-level). Since defect data is often available at these higher levels, this aggregation allows researchers to build defect prediction models. Recent findings by Landman et al. indicate that aggregation is likely to inflate the correlation between size...

The notion of cointegration has lead to a renewed interest in the identification and estimation of structural relations among economic time series, a field to which Henri Theil has made many pioneering contributions. This paper reviews the different approaches that have been put forward in the literature for identifying cointegrating relationships and imposing (possibly over-identifying) restri...

Zoonosis refers to the transmission of infectious diseases from animal to human. The increasing number of zoonosis incidence makes the great losses to lives, including humans and animals, and also the impact in social economic. It motivates development of a system that can predict the future number of zoonosis occurrences in human. This paper analyses and presents the use of Seasonal Autoregres...

This paper analyzes the evolution of pay inequality in Cuba from the early 1990s through 2004 during what was known as the “Special Period in Times of Peace” and after. We measured pay inequality across sectors and regions using the between-groups component of Theil’s T statistic, and we mapped the changing components of that statistic in order to provide a compact summary of structural change ...

The use of residuals for detecting departures from the assumptions of the linear model, whether full rank or not, has long been recognized as an important diagnostic tool, once it became computationally feasible to compute them in a straight forward way, and several contributions to the literature have focussed on their underlying properties and their effectiveness. The recursive residuals are ...

1 HarvestPlus Technical Monographs are designed to provide a forum for HarvestPlus research outputs. Technical Monographs can be of two kinds: • state-of-the-art reviews that help to establish and define HarvestPlus research questions or, • "gold standard" procedures to be followed in HarvestPlus research. HarvestPlus technical monographs are written by recognized experts in the field and are e...

− When analyzing customer satisfaction data it is very often requested for the metrologist to provide a leverage index in order to identify which attribute of the product or service (predictor) needs to be improved to increase the satisfaction level (dependant variable). This is usually done by the means of a questionnaire with many items each covering an attribute and performing a quantitative...

This article examines one important component of the problem of implementing the federal government's Clean Air policy, namely, the difficulty of quantifying the rela­ tionship between emissions to the atmosphere and ambient air quality. Short·, middle·, and long.tenn contt"ol strategies are discussed with an emphasis on the information needed for their effective assessment and implemeDlation. ...

Soft l i thography is a low-cost, non-photolithographic strategy for carrying out micloand nano-fabrication. This unconventional approach consists oftechniques based on self-assembly and replica moiding oforganic molecules and polyneric marerialsFour such techniques, microcontact printing (ICP). replica molding. micromolding in capil laries (MIMIC), and microtransfer molding (ITM ). have been d...

Theil, Basmann, and Sargan are often credited with the development of the two-stage least squares (TSLS) estimator of the coefficients of one structural equation in a simultaneous equations model. However, Anderson and Rubin had earlier derived the asymptotic distribution of the limited information maximum likelihood (LIML) estimator by finding the asymptotic distribution of what is essentially...