世界银行-打破无形的障碍：快速互联网是否改善了进入投入市场的机会？（英）

Policy Research Working Paper11122Breaking Invisible BarriersDoes Fast Internet Improve Access to Input Markets?Banu DemirBeata JavorcikPiyush Paritosh PanigrahiInternational Finance CorporationMay 2025 Public Disclosure AuthorizedPublic Disclosure AuthorizedPublic Disclosure AuthorizedPublic Disclosure AuthorizedProduced by the Research Support TeamAbstractThe Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.Policy Research Working Paper 11122This paper explores how improved internet infrastructure impacts supply chains and economic activity, focusing on Turkiye. Using the expansion of fiber-optic networks and firm-to-firm transaction data, the paper finds that better connectivity shifts input sourcing to well-connected regions and diversifies supplier networks. Estimates from a spatial equilibrium model with endogenous network formation and rational inattention show that high-speed internet reduced information acquisition and communication costs. Enhanced connectivity increased real income by 2.2 per-cent in the median province. The findings underscore the importance of digital infrastructure investments in fostering economic growth by improving supply chain efficiency and broadening firms’ access to suppliers.This paper is a product of the International Finance Corporation. It is part of a larger effort by the World Bank Group to provide open access to its research and make a contribution to development policy discussions around the world. Policy Research Working Papers are also posted on the Web at http://www.worldbank.org/prwp. The authors may be contacted at ppanigrahi@ifc.org. Breaking Invisible Barriers:Does Fast Internet Improve Access to Input Markets?Banu Demir*Beata Javorcik†Piyush Panigrahi‡JEL Codes: O33, L14, D85, D83, R12, F14, O18, L23.Keywords: High-speed internet; fiber-optic infrastructure; supplier diversification; productionnetworks; firm-to-firm transactions; rational inattention; digital infrastructure; network formation.We thank our discussants Andrew Bernard, Julien Martin, Andreas Moxnes, and Lin Tian for theirinsightful comments. We also thank conference and seminar participants at the EBRD, Warwick,Birmingham, Cambridge, Bank of Italy, Maastricht, KCL Trade and Development Workshop, STEG,ERWIT, BSE Summer Forum and CESIfo. We are also grateful to the EIS team at the Ministry ofIndustry and Techno