Acknowledgements: I thank Donald Siegel for suggesting that I consider my research about environmental R&D in the context of the literature about corporate social responsibility. I thank the Nelson A. Rockefeller Center for the Social Sciences at Dartmouth College for the financial support of a Reiss Family Senior Faculty Research Grant that launched the research project described in Scott (200...

Using Bayesian statistical models, the authors investigated spatial and temporal variations in small-area malaria incidence rates for the period mid-1986 to mid-1999 for two districts in northern KwaZulu Natal, South Africa. Maps of spatially smoothed incidence rates at different time points and spatially smoothed time trends in incidence gave a visual impression of the highest increase in inci...

Global, regional, and country statistics on population and health indicators are important for assessing development and health progress and for guiding resource allocation, but data are often lacking, especially in lowand middle-income countries. To fill the gaps, statistical modeling is frequently used to produce comparable health statistics across countries that can be combined to produce re...

Serial Analysis of Gene Expression, or SAGE, is a technology of measuring the expression levels of the mRNA transcripts. The result of a SAGE experiment is reported as a SAGE library, which contains the counts of various short segments (tags) of the cDNA clones. Through a close examination of the SAGE experiment protocol, we derive a new statistical model for the SAGE data, and give new tests f...

My research focus is on algebraic statistics and, in particular, on algebraic statistical models. These are statistical models that are described either parametrically or implicitly in terms of algebraic conditions on a natural parameter space. A precise definition appears in my paper with Drton [11]. I focus on algebraic statistical models because (a) they are ubiquitous in statistics, (b) the...

Definition 1 (Partition) A collection of sets {H1, . . . ,HK} is a partition of another set H if 1. the events are disjoint, which we write as Hi ∩Hj = ∅ for i 6= j; 2. the union of the sets is H, which we write as ∪k=1Hk = H. In the context of identifying which of several statements is true, if H is the set of all possible truths and {H1, . . . ,HK} is a partition of H, then exactly one out of...

BACKGROUND Physical activity as measured by activity counts over short time intervals across a 24 h period are often used to assess circadian variation. We are interested in characterizing circadian patterns in activity among adolescents and examining how these patterns vary by obesity status. New statistical approaches are needed to examine how factors affect different features of the circadia...

This paper completes the statistical modeling of the Hubble ow when a Tully-Fisher type relation is used for estimating the absolute magnitude M a p + b from a line width distance indicator p. Our investigation is performed with the aim of providing us with a full understanding of statistical biases due to selection eeects in observation, regardless of peculiar velocities of galaxies. We show t...

Health management programmes are generally evaluated as point treatment studies in which only a baseline and outcome measurement are used in the analysis, even when multiple observations for each individual are available. By summarizing observations into two distinct measurements the evaluator loses any ability to discern patterns of change in the outcome variable over time in relation to the i...