The Birth-Rate Crisis Isn’t as Bad as You’ve Heard—It’s Worse

New research indicates global fertility rates are declining far more rapidly than official UN projections, with many middle-income countries now experiencing birth rates significantly below those of rich nations. Economist Jesús Fernández-Villaverde highlights that the global population is likely to begin shrinking by 2055, decades earlier than anticipated, due to consistently overoptimistic UN models that assume future fertility rebounds. This accelerated demographic shift poses severe economic risks, including labor shortages and increased dependency ratios, potentially leading to widespread stagnation akin to Japan's experience but at even lower fertility levels, underscoring the urgent need for reevaluated long-term economic and fiscal strategies.

Analysis

New research indicates a significant acceleration in global population decline, challenging the foundational assumptions of the United Nations' 'World Population Prospects'. Analysis by macroeconomist Jesús Fernández-Villaverde reveals that UN demographic models are systemically overoptimistic, projecting fertility rebounds that are not materializing. For instance, Colombia's 2024 births were just 445,000, far below the UN's projected 701,000, resulting in a fertility rate of 1.06—significantly lower than the 1.3-1.5 range that precipitated Japan's economic stagnation. This trend is widespread, with countries from Poland to Thailand also reporting birth rates that fall below the UN's 2.5-percent probability cutoff. The core issue lies in the UN model's assumption that fertility rates will either flatten or rebound, an assumption contradicted by current data showing even former 'rebound' stories like Belarus and France hitting new all-time lows. Consequently, the global population is now forecast to begin shrinking as early as 2055, nearly three decades ahead of the UN's 2084 estimate. This accelerated timeline presents severe, under-appreciated risks to long-term economic growth, fiscal stability, and sovereign credit, as a rapidly shrinking workforce will struggle to support an aging population, particularly in middle-income countries that now face the prospect of becoming old before they become rich.

Key Decisions for Investors

• Re-evaluate long-term global growth assumptions underpinning asset allocation models, as the accelerated timeline for population decline suggests sustained headwinds for global GDP and corporate earnings growth.
• Intensify scrutiny of sovereign risk, particularly in emerging markets like Colombia and Chile, where sub-replacement fertility rates threaten fiscal stability, economic development, and debt sustainability.
• Consider overweighting thematic investments in sectors poised to benefit from demographic decline, such as automation, robotics, and elder-care services, which address labor shortages and the needs of an aging population.
• Monitor national-level birth statistics as a leading indicator for long-term economic viability, as discrepancies with official forecasts may signal an earlier-than-expected onset of economic stagnation and fiscal pressure.