They are both complete sentences. Hope I helped you
This is because in the "U.S.A.", people in all the regions in the U.S.A. historically migrated throughout an "entire land mass" (essentially) ; and this "land mass" tends to be more "homogeneous" (as opposed to "British English" speakers; who speak with different dialects, accents). Note that the United Kingdom, including Great Britain, is further isolated from the U.S.A.—by a huge ocean— than the "relatively more homogeneous physical region"/ and thus the "relatively more linguistic region".
Answer
The ADB said it sees public investments rebounding during the 2nd half of 2019. Slowing inflation, low unemployment, and steady remittances are expected to support household consumption.