Certain species in nature have evolved characteristics that provide protection from predators. Batesian mimicry is a system that describes a model/mimic relationship, in which a palatable organism phenotypically resembles an unpalatable organism. The effectiveness of the mimicry system may...

The association between improving economic conditions and declining growth of population has led economists and demographers to hypothesise a direct relationship between indicators of economic development and fertility rates. Using recent National Family Health Survey data and the 1991 Census to...

It has been shown in past research that unemployment has a large negative impact on subjective well-being of individuals. In this paper, I explore whether and to what extent people with more social capital are sheltered from the harmful effects of unemployment. Using data from the German...

Data Analysis Using Stata provides a comprehensive introduction to Stata that will be useful to those who are just learning statistics and Stata as well as users of other statistical packages making the switch to Stata. Throughout the book, the authors make extensive use of examples using data...

This article describes the new Stata command xml_tab, which outputs the results of estimation commands and Stata matrices directly into tables in XML format. The XML files can be opened with Microsoft Excel or OpenOffice Calc, or they can be linked with Microsoft Word files. By using XML,...

This paper shows how to cope with a problem of model selection and simplification using the principle of coherence (Gabriel (1969): A procedure involving testing a set of models ought not accept a model while rejecting a more general model). The mathematical lattice theory is used to define a...

A time series is a sequence of observations made over time. Examples in public health include daily ozone concentrations, weekly admissions to an emergency department or annual expenditures on health care in the United States. Time series models are used to describe the dependence of the...