A new report from Bridgewater Associates estimates that sub-Saharan Africa requires a doubling of current investment to at least 30% of gross domestic product “to achieve a much steeper development trajectory.” The hedge fund forecasts Africa’s long-term future economic growth at a maximum of 5.5%, based on a “positive but low” long-term output-per-worker growth of 2%, and working-age population growth of about 3%. The estimates “suggest that, unless there is significant and persistent additional action, the region will not achieve the growth levels needed to meaningfully address the current imbalances,” the report said.