[Paper Review] Endogenous structural transformation in economic development

Justin Yifu Lin, Haipeng Xing|arXiv (Cornell University)|Nov 7, 2020

Economic Growth and Productivity21 references4 citations

TL;DR

This paper proposes an endogenous structural transformation (EST) framework that models how economies optimally reconfigure their industrial, technological, and institutional structures over time to achieve sustained development. By extending the Ramsey growth model to incorporate dynamic, structure-dependent resource allocation under a social planner’s optimization, the framework establishes a new 'structural equilibrium' alongside static and dynamic equilibria, offering a unified model for stagewise development across diverse economic structures and institutions.

ABSTRACT

This paper extends Xing's (2023abcd) optimal growth models of catching-up economies from the case of production function switching to that of economic structure switching and argues how a country develops its economy by endogenous structural transformation and efficient resource allocation in a market mechanism. To achieve this goal, the paper first summarizes three attributes of economic structures from the literature, namely, structurality, durationality, and transformality, and discuss their implications for methods of economic modeling. Then, with the common knowledge assumption, the paper extends Xing's (2023a) optimal growth model that is based on production function switching and considers an extended Ramsey model with endogenous structural transformation in which the social planner chooses the optimal industrial structure, recource allocation with the chosen structure, and consumption to maximize the representative household's total utility subject to the resource constraint. The paper next establishes the mathematical underpinning of the static, dynamic, and switching equilibria. The Ramsey growth model and its equilibria are then extended to economies with complicated economic structures consisting of hierarchical production, technology adoption and innovation, infrastructure, and economic and political institutions. The paper concludes with a brief discussion of applications of the proposed methodology to economic development problems in other scenarios.

Motivation & Objective

• To develop a theoretical framework for modeling endogenous structural transformation in catching-up economies during economic development.
• To address the gap in existing models by formally incorporating the three attributes of economic structures: structurality, durationality, and transformality.
• To extend the Ramsey growth model to include optimal choice of industrial structure, resource allocation, and consumption under a social planner’s objective.
• To establish a competitive equilibrium theory that includes a novel structural equilibrium type, beyond static and dynamic equilibria.
• To demonstrate the framework’s flexibility in modeling complex structures such as hierarchical production, innovation, infrastructure, and institutional change.

Proposed method

• Defines economic structure through three attributes: structurality (composition of economic activities), durationality (time-varying nature), and transformality (capacity for change).
• Extends the Ramsey model by embedding endogenous structural transformation, where the social planner chooses optimal industrial structure and resource allocation to maximize household utility subject to resource constraints.
• Introduces a mathematical framework to characterize static, dynamic, and switching (structural) equilibria in the extended model.
• Applies the model to complex structures, including hierarchical production chains, technology adoption and R&D, infrastructure, and political/institutional transitions.
• Uses the common knowledge assumption to model information availability on economic structures, enabling optimal planning and transformation decisions.
• Derives the competitive equilibrium for the EST model, showing that structural equilibrium emerges as a distinct equilibrium type in addition to static and dynamic equilibria.

Experimental results

Research questions

• RQ1 How can economic structures be formally defined and modeled using the attributes of structurality, durationality, and transformality?
• RQ2 What is the role of the social planner in endogenously selecting optimal industrial structures and resource allocations to maximize social welfare during development?
• RQ3 How does the inclusion of structural transformation alter the standard competitive equilibrium framework in Ramsey-type growth models?
• RQ4 What are the implications of the EST framework for understanding development failures such as the middle-income trap or failed import-substitution industrialization?
• RQ5 How can the EST model be extended to incorporate heterogeneous structures like infrastructure, institutions, and technological innovation pathways?

Key findings

• The EST framework introduces a new type of competitive equilibrium—structural equilibrium—alongside static and dynamic equilibria, enriching the standard neoclassical growth model.
• The model demonstrates that sustainable growth in catching-up economies requires not just capital accumulation but also endogenous structural transformation enabled by optimal industrial and institutional choices.
• The failure of import-substitution strategies in developing countries is explained as a result of targeting capital-intensive structures despite capital scarcity, which the EST model can prevent through optimal structure selection.
• The model shows that capital accumulation in East Asian economies was sustainable because it enabled structural upgrading and technology adoption, not just factor accumulation, aligning with the absence of diminishing returns before reaching the global frontier.
• The framework explains the middle-income trap as a failure to cross capital thresholds or overcome coordination failures in hard and soft infrastructure, which the EST model can address via optimal policy intervention.
• The EST model can be extended to heterogeneous-agent models, overlapping generations, open economy trade structures, and stochastic growth, demonstrating broad applicability across macroeconomic frameworks.