Competition and Defaults in Online SearchIndian Rupee

• 成果类型: Article
• 署名作者: Decarolis, Francesco; Li, Muxin; Paternollo, Filippo
• 署名单位: Bocconi University; Fudan University; Shanghai Institute for Mathematics & Interdisciplinary Sciences; Massachusetts Institute of Technology (MIT)
• 刊物名称: AMERICAN ECONOMIC JOURNAL-MICROECONOMICS
• ISSN/ISSBN: 1945-7669
• DOI: 10.1257/mic.20230193
• 发表日期: 2025
• 页码: 369-414
• 关键词: inertia; MARKETS; POLICY

摘要

This paper offers the first systematic quantitative assessment of default-option interventions designed to mitigate Google's search dominance. By analyzing interventions in the European Economic Area (EEA), Russia, and Turkey, we find that across all three cases, changes to default settings effectively reduced Google's market share. The causal impact amounts to less than 1 percentage point in the EEA and over 10 percentage points in Russia and Turkey. Differences arise from intervention nuances, including the size of the targeted users' group, local market characteristics, and remedy designs. We discuss the complexity of assessing the interventions' impact on welfare deriving from quality responses. (JEL G34, K21, L13, L82, O14, P31)