A change in the marginal propensity to consume causes a pivotal change in the consumption function.
The Robinson family plays a pivotal role in the popular soap and Dennis is the only current cast member to appear in the first episode and remain on the show (although he did take a 13-year break in the 1990s).
This ground breaking storyline remains one of the more pivotal moments in soap opera history despite changes in 2006 that stated instead of an abortion, Erica's fetus was stolen and implanted in another woman.
Arguably, Luke and Laura's storyline is littered with such pivotal moments: their dance at Wyndham's, Laura's return from the dead, the couple's return to Port Charles in the 1990s, Laura's grief at learning Lucky was dead and many more.
Bent on a comeback, this time with an impressive new graphics and physics engine, the story takes place during the events of Pearl Harbor and unfolds with the player fighting through pivotal battles against the forces of Japan.