Stagnant global trade, subdued investment, and heightened policy uncertainty marked another difficult year for the world economy. A moderate recovery is expected for 2017, with receding obstacles to activity in commodity-exporting emerging market and developing economies. Weak investment is weighing on medium-term prospects across many emerging market and developing economies. Although fiscal stimulus in major economies, if implemented, may boost global growth above expectations, risks to growth forecasts remain tilted to the downside. Important downside risks stem from heightened policy uncertainty in major economies. In addition to discussing global and regional economic developments and prospects, this edition of Global Economic Prospects includes a chapter on the causes, consequences and policy implications of weak investment in emerging markets and developing economies, and a special focus on the role of the U.S. economy in the world. Global Economic Prospects is a World Bank Group Flagship Report that examines global economic developments and prospects, with a special focus on emerging market and developing countries, on a semiannual basis (in January and June). The January edition includes in-depth analyses of topical policy challenges faced by these economies, while the June edition contains shorter analytical pieces.