What is a scientific theory? How is it different from a law or a principle? And what practical is it? Science students, especially those new to studying the sciences, ask these questions everyday about these essential parts of a science education. To supp

This groundbreaking Encyclopedia is the very first fully-refereed A-Z compendium of the main principles, concepts, problems, institutions, schools and policies associated with political economy. Based on developments in political economy since the 1960s, it is designed to provide a comprehensive introduction to the field as well as being an authoritative reference work. Undergraduates taking courses in political economy or graduate students coming to the field for the first time will rely on this work as a key point of reference and for direction in their further reading. This lucid work compares for the first time the disparate theories of political economy (e.g, Marxist, Feminist, Sraffian etc.) and emphasizes the application of their principles to real world problems such as inflation, unemployment, development and financial instability. The extensive international team of consultants and contributors has produced a monumental work with truly global perspective.

In 1800, Europeans governed about one-third of the world's land surface; by the start of World War I in 1914, Europeans had imposed some form of political or economic ascendancy on over 80 percent of the globe. The basic structure of global and European politics in the twentieth century was fashioned in the previous century out of the clash of competing imperial interests and the effects, both beneficial and harmful, of the imperial powers on the societies they dominated. This encyclopedia offers current, detailed information on the major world powers of the nineteenth century and their global empires, as well as on the people, events, and ideas, both European and non-European, that shaped the Age of Imperialism.--Publisher description.

A comprehensive source that offers a multidisciplinary overview of all aspects of aging.

The central aim of this encyclopedia is to give the reader a comparative perspective on issues involving conceptions of gender, gender differences, gender roles, relationships between the genders, and sexuality. The encyclopedia is divided into two volumes: Topics and Cultures. The combination of topical overviews and varying cultural portraits is what makes this encyclopedia a unique reference work for students, researchers and teachers interested in gender studies and cross-cultural variation in sex and gender. It deserves a place in the library of every university and every social science and health department. Contents:- Glossary. Cultural Conceptions of Gender. Gender Roles, Status, and Institutions. Sexuality and Male-Female Interaction. Sex and Gender in the World's Cultures. Culture Name Index. Subject Index.