Information diffusion effects in individual investors' common stock purchases: Covet thy neighbors' investment choices

• 成果类型: Article
• 署名作者: Ivkovic, Zoran; Weisbenner, Scott
• 署名单位: University of Illinois System; University of Illinois Urbana-Champaign; Michigan State University; National Bureau of Economic Research
• 刊物名称: REVIEW OF FINANCIAL STUDIES
• ISSN/ISSBN: 0893-9454
• DOI: 10.1093/revfin/hhm009
• 发表日期: 2007
• 页码: 1327
• 关键词: RETIREMENT PLAN; PARTICIPATION; decisions; geography; portfolio; BEHAVIOR; trades

摘要

We study the relation between households' stock purchases and stock purchases made by their neighbors. A ten percentage point increase in neighbors' purchases of stocks from an industry is associated with a two percentage point increase in households' own purchases of stocks from that industry. The effect is considerably larger for local stocks and among households in more social states. Controlling for area sociability, households' and neighbors' investment style preferences, and the industry composition of local firms, we attribute approximately one-quarter to one-half of the correlation between households' stock purchases and stock purchases made by their neighbors to word-of-mouth communication.