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Measuring effort
Skott, Peter, (1997)
Defining and measuring work engagement : bringing clarity to the concept
Schaufeli, Wilmar B., (2010)
The measurement and analysis of motivation
Ployhart, Robert E., (2008)
Burnout, chronic fatigue, and prozac in the professions : the iron law of salaries
Haight, Alan Day, (2001)
Winner-take-a-hike markets : the arrogant agent problem in a model of devious colleague selection
Haight, Alan Day, (2003)
The intolerance multiplier : a diagram
Haight, Alan Day, (2013)