In celebration of its 15th anniversary in 2019, the International Policy Centre for Inclusive Growth (IPC-IG) has produced a compilation of one of its most popular research publication formats. This fourth volume compiles One Pagers numbered 300 to 399. Over the last decade and a half, people have downloaded these highly successful publications millions of times in over 180 countries. One Pagers are short and succinct pieces that help familiarise readers with complex policy discussions. They represent an effective knowledge-sharing tool, calling on policymakers, researchers and development practitioners to rethink inclusive growth policies and poverty alleviation strategies.