According to a 2011 study by hotel chain Premier Inn, people who sleep on the left side are better off than those who sleep on the right side. One of the examples they give:
In fact, 31% of ‘lefties’ love their job compared with just 18% of ‘righties’
Is there any supporting evidence for this claim?
I don't think this is a case of illusory superiority, which another claim in the article reeks of:
And two-thirds of those who doze on the left reckon they are calmer than their partner in a crisis.