世界城市指数World City Index

Cities are the spatial carriers of civilization and the converging nodes of the global economy, capital, technology, and population. To measure a city's position in the global system, one must look not only at its "volume"—economic and population scale—but also at its "quality"—economic quality and infrastructure maturity—as well as its "vitality"—scientific and technological innovation capability—and its "responsibility"—its real contribution to the real economy and global supply chains.

This index is built on CPPPS's proprietary algorithm: rather than directly reproducing the rankings issued by international institutions (such as the Globalization and World Cities Research Network and global city consultancies), it computes its own rankings from underlying public data. The model decomposes city evaluation into four dimensions—Scale, Quality, Innovation, and Contribution: Scale considers metropolitan-area GDP and population; Quality considers financial/economic quality and infrastructure; Innovation considers R&D investment, patents, and the science-technology ecosystem; Contribution considers global radiation and real-economy contribution. Among them, the "Contribution" dimension is distinctive to this index, notably incorporating manufacturing and real-economy contribution to correct the overemphasis on "finance and headquarters economy" in prevailing international rankings and restore the value of industrial and manufacturing cities.

To prevent megacities from monopolizing the scale indicators, large-span scale indicators are uniformly log-transformed and then range-normalized and weight-aggregated. Results: New York, Tokyo, London, Shanghai, and Seoul rank in the top five. Overall, global hubs that combine economic scale, institutional maturity, technological vitality, and a real-economy base lead the field, followed in order by regional centers and specialized cities. This ranking is based on publicly known approximate values, uniformly annotated "subject to official sources," remains permanently free and public, and is provided for research and reference only.

A city is a complex multi-dimensional system, and a single scale-based ranking cannot reflect its true global position. This algorithm follows the core principles of the CPPPS evaluation specification—not excerpting rankings from public lists, computing from underlying data, and adopting the multi-dimensional structure of "Scale + Quality + Innovation + Contribution":

Each indicator is range-normalized to [0,1]; large-span scale indicators are first log-transformed and then weight-aggregated by dimension:

Both GDP and population are first log-transformed (log1p) and then range-normalized. The purpose of the log transform is to prevent megacities such as New York and Tokyo from monopolizing the Scale dimension and to smooth out scale disparities.

The weight design embodies "Scale as the base, Quality as the core, Innovation as the wings, and Contribution as the soul": Quality (0.30) and Scale (0.28) form a city's basic foundation, together accounting for 58%; Contribution (0.24) highlights this index's orientation toward the real economy and global responsibility; Innovation (0.18) reflects the marginal boost of technology to a city's long-term competitiveness.

Metropolitan-area GDP and population are publicly known approximate values around 2024 (derived from public data of national statistical agencies, economic cooperation organizations, and international organizations); financial/economic quality, infrastructure, innovation/technology, global radiation, and real-economy contribution are qualitative-quantitative approximate values based on public information, all annotated "subject to official sources." This model has the following limitations: first, the caliber of metropolitan areas varies by country (administrative divisions and commuting-zone definitions differ), so cross-city comparability is affected by statistical calibers; second, qualitative indicators carry subjective error; third, institutional and soft factors such as political stability, safety, environmental livability, and cultural influence are not included. The ranking is for research and reference only and does not constitute any investment or policy advice.