Happiness at work could be defined as feelings and pleasure that an individual experienced after attainment of individual purpose and the full realization of his/her potential at work. It is also a dynamic process which requires continued effort and the organizational and individual investment, including broad structures such as work engagement, flow experience, thriving at work, job satisfaction and positive emotions at work. Given its complexity, it is necessary to simultaneously measure happiness at work at transient, person and unit level. With the methodological advances, the research in ...