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.
Throughout the 1960s, Lee scripted, art-directed and edited most of Marvel's series, moderated the letters pages, wrote a monthly column called  Stan's Soapbox , and wrote endless promotional copy, often signing off with his trademark motto,  Excelsior ! (which is also the New York state motto).