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KDI 경제교육·정보센터

ENG
  • 경제배움
  • Economic

    Information

    and Education

    Center

한국관련자료
The Informational Role of Online Recommendations: Evidence from a Field Experiment
CEPR
2026.08.13
We conduct a field experiment on a movie-recommendation platform to investigate whether and how online recommendations influence consumption choices. Using a within-subjects design, our experiment measures the causal effect of recommendations on consumption and decomposes the relative importance of two economic mechanisms: expanding consumers‘ consideration sets and providing information about their idiosyncratic match value. We find that the informational component exerts a stronger influence -- recommendations shape consumer beliefs, which in turn drive consumption, particularly among less experienced consumers. Our findings and experimental design provide valuable insights for the economic evaluation and optimisation of online recommender systems.