Originally Posted by
Rincewind
"Cerebus Effect" refers to a series that starts off as very humor driven to the point of being a comedy that slowly introduces more and more dramatic elements until it becomes a very serious drama with little humor.
"Trade Waiting" refers to consumers who do not follow the individual entries of a series but wait until a larger collection of the series is available. So instead of buying the monthly issues of the comic, they wait until the collection is released. For a TV show, it would be a person who does not watch the weekly episodes but gets the DVD season set.
They are two separate issues, but both apply to Cerebus.
A word of warning on reading Cerebus. Dave Sim, the writer and main artist, has been criticized for misogynistic themes. See the wikipedia entry on Cerebus that discusses this in more detail. As the themes became more overt, Sim lost a sizable portion of his readership.