By itself, it explains 30% of the changes observed on the SWB index.
FORBES: Happiness, Freedom, and Autonomy
As the regression analysis in Table 2 demonstrated, a rising sense of free choice is by far the most powerful factor driving rising SWB.
The fact that the people of most countries experienced a growing sense of free choice from 1981 to 2007 seems to be the core reason why SWB has risen.
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