世界银行-机会不平等与投资选择（英）-2023.9-41页_739kb

Inequality of Opportunity and Investment Choices Summary

Objective

This paper examines the impact of inequality of opportunity (IOp) on individual investment decisions using a laboratory experiment. It explores how IOp, defined as income inequality arising from circumstances beyond an individual's control, affects financial risk-taking and investment choices.

Methodology

A randomized controlled experiment was conducted with 499 subjects. Participants were assigned to different scenarios:

• Control Group: Inequality based solely on effort (no IOp).
• IOp+ Group: Inequality based on effort plus an advantageous zip code (IOp).
• IOp- Group: Inequality based on effort plus a disadvantageous zip code (IOp).
  Subjects also received half the information on their income rank. Investment decisions involved choosing between risky and riskless options. Peer effects were analyzed by randomizing rank feedback.

Key Findings

• IOp alone does not significantly influence investment choices or risk-taking.
• Knowledge of one's income rank is necessary for IOp to impact investment; disadvantaged groups (IOp-) invest more upon learning their lower rank to recover from inequality.
• Peer comparison plays a crucial role; subjects use rank information to "keep up with the Joneses" by taking more risk.
• Statistical results show significant differences only when rank information is combined with IOp exposure, such as IOp- groups investing more than control groups.

Implications

• Peer effects are central to understanding IOp's influence on financial decisions.
• Policies focusing on equal opportunities and fair income distribution can enhance investment and growth, though more equitable access to productive investments is needed.
• Future research should explore heterogeneous effects and the role of scale in investment responses to exogenous shocks.