The direction of a correlation is either positive or negative. In a negative correlation, the variables move in inverse, or opposite, directions. In other words, as one variable increases, the other variable decreases. For example, there is a negative correlation between self-esteem and depression. In other words, the higher your self-esteem, the lower your feelings of depression.
Excel Communications was founded in 1988 by Dallas entrepreneur Kenny Troutt as a long distance reseller in the US telecom sector at the birth of telecom deregulation.
How PayPal Works. Peter Thiel (pictured here) and Max Levchin founded Confinity in 1998 which became the foundation for PayPal. Peter Thiel and Max Levchin founded PayPal in December 1998 under the name Confinity. Operating out of Silicon Valley, the idealistic vision of the company was one of a borderless currency, free from governmental controls.