Tianyu Fan

Postdoctoral Research Associate
Princeton University

Assistant Professor of Economics
CUHK, from 2027

Tianyu Fan

My research studies how technologies, geopolitics, and structural change shape economic growth, international trade, and the distribution of income.

Publications

Growing Like India: The Unequal Effects of Service-Led Growth

with Michael Peters and Fabrizio Zilibotti

Econometrica, 2023, 91(4): 1457–1494

Structural transformation in most currently developing countries takes the form of a rapid rise in services but limited industrialization. In this paper, we propose a new methodology to structurally estimate productivity growth in service industries that circumvents the notorious difficulties in measuring quality improvements. In our theory, the expansion of the service sector is both a consequence, due to income effects, and a cause, due to productivity growth, of the development process. We estimate the model using Indian household data. We find that productivity growth in nontradable consumer services such as retail, restaurants, or residential real estate was an important driver of structural transformation and rising living standards between 1987 and 2011. However, the welfare gains were heavily skewed toward high-income urban dwellers.

Working Papers

Measuring Geopolitical Alignment and Economic Growth

arXivShort replication

This paper introduces a new event-based measure of bilateral geopolitical alignment and provides evidence that it shapes economic growth. The measure is built from 373,020 geopolitical events across 193 countries over 1960–2024, compiled using large language models. With local projections exploiting within-country temporal variation, we find that a one-standard-deviation permanent improvement in geopolitical alignment increases GDP per capita by approximately 10 percent over 25 years. These effects are associated with improvements in domestic stability, investment, productivity, trade, and human capital. In illustrative accounting exercises, observed geopolitical changes correspond to GDP differences ranging from about −30 to +30 percent across countries and time periods.

Media: Le Monde Marginal Revolution

Geopolitical Barriers to Globalization

with Mai Wo and Wei Xiang

arXiv

We show that since the mid-1990s, the trade-promoting effects of tariff liberalization have been increasingly offset by deteriorating geopolitical alignment, slowing trade globalization after 2007. To quantify this barrier, we use large language models to compile 833,485 geopolitical events across 193 countries, 1950–2024, and construct a bilateral geopolitical alignment score. Using local projections, we estimate that a one-standard-deviation permanent improvement in alignment raises bilateral trade by 22 percent in the long run. In an Armington framework, tariff reductions raised 2021 global trade by about 7.5 percent, while geopolitical deterioration reduced it by about 5.3 percent, with uneven welfare effects.

The Labor Market Incidence of New Technologies

arXiv

This paper develops a framework for empirically estimating aggregate labor supply across occupations with flexible substitution patterns and applies it to study the incidence of automation and artificial intelligence in the U.S. labor market. Central to the analysis is the distance-dependent elasticity of substitution (DIDES), where worker substitutability between occupations declines with their distance in skill space. By mapping 306 occupations into cognitive, manual, and interpersonal skill dimensions, we estimate a low-dimensional latent skill model that preserves granular substitution patterns. We show that both automation and artificial intelligence cluster in skill-adjacent occupations, constraining employment adjustment and amplifying wage effects: 20–50% of labor demand shocks pass through to wages, while mobility recovers only 20% of wage losses.

Research in Progress

Measuring Inflation Inequality with Incomplete Prices

with Olivia Ding and Kan Yao

Data

Global Geopolitical Events Database

Bilateral geopolitical alignment across 193 countries, 1950–2024. Download alignment scores, read the documentation, and find the associated research.

Data and documentation