The distinction is based on the employer's degree of control over a worker, the length of the relationship and a series of other factors.

WSJ: Payroll Audits Put Employers on Edge

There was a strong relationship between social context and the relative level of rejected ballots - the greater the degree of social deprivation in a constituency, the higher the rate of ballot rejections.

BBC: NEWS | UK | Scotland | Ballot paper report at-a-glance

Ireland of the University of Texas, which found that over time, the degree of similarity begins to reflect the closeness (or coolness) of a relationship.

FORBES: Get Face to Face to Get Over It

"I think if the government and the airline industry are successful in securing the plane against future attacks like that, and it's demonstrated to some degree and it's kind of validated, the issue of height as a relationship to terror will probably go away, " he said.

CNN: Architects don't foresee skyscraper's demise

On Apple relationship, he says they have a good search and maps partnerships, and compete with Android to some degree in browsers.

FORBES: Connect

However, the degree of aggression and dissocial acts means it is more serious than just a difficult parent-child relationship.

BBC: Mental health: Conduct disorders