This latest, Fourth Edition has had to be revised substantially in order to take into consideration, the many changes in attitudes and practice which have been cha.acteristic of the last few years. The reader will find here about 5,000 entries. The objective is still to supply a quick explanation, rather than a definition, of economic theory and applied economics. The range of the entries, as before, includes many of the more important economic terms, as well as words and phrases appertaining to related subjects such as the social sciences.