The organizational context of human factors engineering

Human factors engineering concerns the design of equipment in accordance with the mental and physical characteristics of operators. Human factors engineers advise design engineers, but the organizational context limits their influence and restricts their perspective. The discussion of organizational context in this paper explains why military and industrial top management personnel are indifferent to good human factors design and shows how the social structure favors the choice of technologies that centralize authority and deskill operators and how it encourages unwarranted attributions of operator error. The role of equipment and system design in shaping cognitive maps and mental models is explored, and the technology-social structure paradigm is questioned.     

Structural shifts in urban population density gradients: an empirical investigation

This study investigates the structural shifts in urban population density gradients by first using the shifting regression technique of Farley, Hinich, and McGuire to detect the possible change in the structure of an urban area. Secondly, a generalized random coefficient technique is used to simultaneously detect the possible structural change and stochastic behavior of density gradients. Data for 50 United States SMSA's are used to do the empirical analyses.