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The objective of this study is to investigate the simultaneity between farm couples’ decisions on labor allocation and production efficiency. Using an unbalanced panel data set of Norwegian farm households (1989–2008), we estimate off-farm labor supply of married farm couples and farm efficiency in a three-equation system of jointly determined endogenous variables. We address the issue of latent heterogeneity between households. We solve the problem by two-stage OLS and GLS estimation where state dependence is accounted for in the reduced form equations. We compare the results against simpler model specifications where we suppress censoring of off-farm labor hours and endogeneity of regressors, respectively. In the reduced form specification, a considerably large number of parameters are statistically significant. Davidson–McKinnon test of exogeneity confirms that both operator and spouse's off-farm labor supply should be treated as endogenous in estimating farming efficiency. The parameter estimates seem robust across model specifications. Off-farm labor supply of farm operators and spouses is jointly determined. Off-farm work by farm operator and spouses positively affects farming efficiency. Farming efficiency increases with operator's age, farm size, agricultural subsidises, and share of current investment to total farm capital stock.

As a standard procedure of human factors engineering, the design of complex systems (e.g., operator interfaces) starts with analyses of system objectives, missions, functions, and tasks. Perceptual Control Theory (PCT) provides a theoretical framework for guiding this process. PCT is founded on notions from control theory, in which closed-loop, negative-gain, feedback systems can be used to build powerful models of goal-directed behavior and for implementing complex systems (Powers, 1973). One of the strengths of PCT over competing human behavior theories is that it explains how humans can control systems that are subject to a wide variety of external influences. UAV control is through the operators’ interaction with the interfaces in remote control stations. A closed-loop feedback system is crucial for both operators and control systems to understand the states and goals of each other. It is likely that advanced UAV control systems will require operators to interact with automated systems such as IAIs. IAIs are sophisticated and will require knowledge about mission goals, the operators’ goals, and states, as well as the UAV and environmental states. Thus, the methods of analysis used in this research were based on PCT given its engineering origins in control theory and advantages accommodating various external disturbances.

The Cognitive Engineering Research Institute's First Annual Human Factors of unmanned aerial vehicles (UAVs) Workshop, held on May 24–25, 2004 in Chandler Arizona, and Second Annual Human Factors of UAVs Workshop, held on May 25–26, 2005 in Mesa Arizona, brought to light many human factors issues regarding the technology and operation of UAVs. An integral part of the event was the involvement of military UAV operators from the U.S. Air Force (USAF), U.S. Navy, and U.S. Army. The involvement of UAV operators in the workshops was valuable in linking developers and human factors researchers in the improvement of UAV systems and operations – a practice that is too often implemented only after a system is deployed and the problems are found. The experience of operators serves as a “user's account” of the issues and problems concerning the operation of UAVs. The fact that operators have had first hand experience in operating UAVs provides a unique perspective to the problem of identifying the most pressing human factors issues. The purpose of this chapter is to highlight the perspectives of two UAV operators that helped to set the tone for the entire First Annual Human Factors of UAVs Workshop.

This study inquires into emotion work performed by call center operators. Twelve call center operators were interviewed. Qualitative methodological strategies were utilized, where the focus of the thematic content analysis was on comprehension of the call center operator's work characteristics, the organization's display rules, and the emotional self-management strategies utilized. Two types of emotional self-management strategies were found: cognitive and behavioral. The organization acknowledged that people are not always able to handle the affective cost in relation to emotion work, offering emotional support and models concerning affective self-management strategies to be used. This organizational assistance strongly influenced the choice of strategies, for the call center operators most frequently used strategies taught by the organization. Emotion work was influenced by variables concerning the work context, factors that either favored or made the work, perceptions, evaluations, and the workers and the customers' affective states problematic. Emotion work was crucial in the call center operators' working routine, whenever the customers became aggressive, and social support made the task of displaying predominantly positive feelings less arduous.

The purpose of our article is to contribute to the further understanding of individual responses to pluralism, by studying in particular the role played by critiques and compromises in the formulation of such responses. Drawing on theoretical insights from the sociology of conventions, we look at the various modes of justification publicly advanced by French co-operators when engaging with co-operative principles. Our analysis allows us to identify three main instantiations, that is situated and flexible enactments, of these principles: pragmatic, reformist, and political. Our contribution to the understanding of pluralism and its instantiations by organizational members is threefold. First, in contrast with studies drawing on an institutional-logics perspective, our study shows that individual instantiations of pluralism rely not only on positive affirmations of logics but also on critical mobilizations of competing logics. Second, our study shows that pluralism can be understood not only as co-existing multiple logics, but also as different possible instantiations of the same logic, the ambiguity of which allows compromises to be settled with other logics. Third, we suggest that organizational members’ responses to pluralism often involve more than two logics, which are combined into a complex set of interdependent judgments. In addition, in relation to co-operative studies, our proposed typology provides a mapping that usefully extends the range of possibilities found in co-operators’ instantiations of co-operative principles, thus furthering our understanding of the diversity of the co-operative movement.

This chapter analyses efforts of the union and the management of a large urban transit company to address the high prevalence of hypertension among transit operators. Ethnographic evidence recounts the efforts to change the structure of work in order to decrease the problem. The chapter's key finding is that the features of the work environment that produce hypertension in transit operators in the first place also make it difficult for them to work together with their union leadership to push for lasting work changes necessary to improve their health over the long run.