Data Skeptic

Sustainable Recommender Systems for Tourism

Oct 9, 2025
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ADVICE

Create And Validate Open City Knowledge

  • Build a public, grounded knowledge base (e.g., WikiVoyage, TripAdvisor API) and filter it to create synthetic queries via LLMs.
  • Validate generated data with expert checks and judge LLMs to ensure quality and usefulness.
INSIGHT

No Single Ground Truth For Recommendations

  • Recommendation evaluation lacks a single ground truth and needs adapted metrics beyond precision/recall.
  • Synthetic generation and evaluation require new frameworks acknowledging personalization and subjectivity.
ADVICE

Balance Diversity With Preference Alignment

  • Promote balanced diversity: keep recommendations varied but aligned to user preferences to avoid randomness.
  • Measure diversity with self-BLEU (1 - self-BLEU) to quantify diversity among generated queries.
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