D Q = D e v e l o p m e n t a l   a g e C h r o n o l o g i c a l   a g e ? 100 displaystyle DQ= frac Developmental age Chronological age *one hundred Ethara, an celebration administration corporation inside the UAE, this 7 days introduced a joint venture with Oak View Group. It allows the US-based arena developer to develop into the center East