Does happiness increase productivity?

This paper conducts an experiment in an attempt to investigate the relationship between the levels of happiness of the participants and their productivity. We managed to find strong positive correlation between the two variables. In addition to this we were able to confirm that the increase in the happiness of the subjects, as caused by our treatment procedure, led to improved performance. We also analyzed the subjects who recently experienced a bad life event, confirming the negative correlation between their reported lower levels of happiness and their productivity.