Global economic growth is proving more resilient than expected despite sustained high energy prices, the Organization for Economic Cooperation and Development (OECD), a Paris-based research body, said Wednesday. In its quarterly global outlook, the OECD said worldwide output is likely to expand faster than forecast in June. However, oil prices have remained elevated for longer than anticipated, keeping inflation rates more elevated, while a lengthy Middle East conflict combined with other headwinds could weigh heavily on global activity.