  An agent has access to multiple information sources, each of which provides
information about a different attribute of an unknown state. Information is
acquired continuously -- where the agent chooses both which sources to sample
from, and also how to allocate attention across them -- until an endogenously
chosen time, at which point a decision is taken. We provide an exact
characterization of the optimal information acquisition strategy under weak
conditions on the agent's prior belief about the different attributes. We then
apply this characterization to derive new results regarding: (1) endogenous
information acquisition for binary choice, (2) strategic information provision
by biased news sources, and (3) the dynamic consequences of attention
manipulation.
