How Social Preferences Shape Incentives in (Experimental) Markets for Credence Goods

Area of Science:

• Behavioral Economics
• Market Inefficiencies
• Information Asymmetry

Background:

• Credence goods markets face inefficiencies due to sellers' informational advantage regarding quality.
• Standard economic theory suggests equal mark-up pricing can resolve these issues if quality is verifiable by consumers.
• Empirical evidence, however, contradicts this prediction, indicating a gap in understanding market dynamics.

Purpose of the Study:

• To investigate the reasons behind the failure of verifiability to enhance efficiency in credence goods markets.
• To explore the role of heterogeneity in sellers' social preferences as a potential explanation.
• To experimentally identify and analyze different seller social preference types.

Main Methods:

• Conducted new experiments designed for the parsimonious identification of sellers' social preference types.
• Controlled for variables to isolate the impact of social preferences on market outcomes.
• Analyzed experimental data to correlate seller types with market efficiency under verifiability conditions.

Main Results:

• Confirmed the existence of significant heterogeneity in sellers' social preferences.
• Demonstrated that this heterogeneity is a key factor explaining the inefficiency observed in credence goods markets.
• Provided strong empirical support for the hypothesis that social preferences, not just price or verifiability, drive market outcomes.

Conclusions:

• The failure of verifiability to increase efficiency in credence goods markets is significantly influenced by sellers' diverse social preferences.
• Understanding and accounting for social preferences is crucial for designing effective market mechanisms.
• Future research should consider behavioral aspects alongside traditional economic factors in market design.