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The article presents various titles and abstracts of research papers related to geography by the Association of American Geographers. Some of papers included are "Problems of Geographic Influence," by Albert Perry Brigham, "Some Geographic Factors Influencing Brazilian Trade," by Walter S. Tower, "Postglacial Migrations of Vegetation in the Middle West," by Henry Allan Gleason, "Bases for Dividing the United States into Physiographic Provinces," by N. M. Fenneman, "The Losses of Nebraska," by G. E. Condra.

This paper suggests significant processes associated with regional industrial change. Particular emphasis is given to the sensitivity of an open regional economy to shifts in external trade relationships and the ability of management to assess and adapt to the changing forces influencing theft industries. The case study of Northern Ireland between 1950 and 1968 attempts to explain the transition followed by the leading older industries and why certain alternative paths for regional transition were followed. A recurrent theme is the crucial role played by the regional government. [ABSTRACT FROM AUTHOR]

This paper discusses measures of industry concentration--the concentration ratio, the Herfindahl index and a new measure developed by the authors--both analytically and empirically. The analytical analysis consists of developing a set of properties which we argue all measures of concentration should possess. Although the concentration ratio is shown to be deficient on analytical grounds it appears to yield estimates of concentration not too different from the Herfindahl index and the measure devised by the authors. [ABSTRACT FROM AUTHOR]

Combining theoretical and empirical materials, this paper outlines why definitions of the situation are an important vehicle for analyzing the conditions under which communications are viewed as authoritative by subordinates in complex work organizations. It investigates an exemplary process of collective action—making orchestra music—as a means of understanding the development as well as the demise of consensually validated expertise. Evaluations of conductors as focal participants arise from musicians' conceptions of appropriate work roles and what they construe as information and knowledge which allow them to engage in lines of concerted action. Finally, the results are discussed with regard to their implications for the study of organizational dynamics generally. [ABSTRACT FROM AUTHOR]