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Red giant and supergiant stars have long been favorites of professional 6 and amateur astronomers. These enormous stars emit up to 10 times more energy than the Sun and, so, are easy to study. Some of them, specifically the pulsating long-period variables, significantly change their size, brightness, and color within about a year, a time scale of interest to a single human being. Some aspects of the study of red giant stars are similar to the study of pre-main-sequence stars. For example, optical astronomy gives us a tantalizing glimpse of star forming regions but to really investi gate young...

Comparative Politics: Rationality, Culture, and Structure is a completely revised second edition of the volume that guided thousands of scholars through the intellectual demands and gratifications of comparative political science. Retaining a focus on the field s research schools, it now pays parallel attention to the pragmatics of causal research. Mark Lichbach begins with a review of discovery, explanation and evidence and Alan Zuckerman argues for explanations with social mechanisms. Ira Katznelson, writing on structuralist analyses, Margaret Levi on rational choice theory, and Marc Ross...

Comparative Politics: Rationality, Culture, and Structure is a completely revised second edition of the volume that guided thousands of scholars through the intellectual demands and gratifications of comparative political science. Retaining a focus on the field s research schools, it now pays parallel attention to the pragmatics of causal research. Mark Lichbach begins with a review of discovery, explanation and evidence and Alan Zuckerman argues for explanations with social mechanisms. Ira Katznelson, writing on structuralist analyses, Margaret Levi on rational choice theory, and Marc Ross...