The study assumes that prices will rise.
An example of something someone might assume is that everyone will be nice to each other at an event.
“Is Kay's husband coming to dinner too?” “I assume so.”
An example of a situation in which you may assume a position is if the president of your organization is inept and must be removed from office.
An example of something you may assume is a new duty at your place of work.
The queen assumed a velvet robe.
To assume control.
To assume an obligation.
To assume an air of innocence.