Across the emerging world, policymakers are grappling with how to build retirement systems that meet the needs of their rapidly developing and rapidly aging societies. Nowhere is the challenge more urgent than in Asia, which is both developing and aging more rapidly than anywhere else on earth....

Over the next few decades, the rapid aging of populations in Europe, Japan, and North America threatens the stability of the world's major economies. A determined push for reform can still avert fiscal and economic crisis. But the time for corrective action is running out. And the problem is...

Assumptions about long-term trends in international migration are an increasingly important component of the demographic projection module. Yet most official immigration projections both in the United States and abroad rely on ad-hoc assumptions based on little theory and virtually no definable...