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Computer Science > Information Retrieval
Title: Large Language Models are Learnable Planners for Long-Term Recommendation
(Submitted on 29 Feb 2024 (v1), last revised 26 Apr 2024 (this version, v2))
Abstract: Planning for both immediate and long-term benefits becomes increasingly important in recommendation. Existing methods apply Reinforcement Learning (RL) to learn planning capacity by maximizing cumulative reward for long-term recommendation. However, the scarcity of recommendation data presents challenges such as instability and susceptibility to overfitting when training RL models from scratch, resulting in sub-optimal performance. In this light, we propose to leverage the remarkable planning capabilities over sparse data of Large Language Models (LLMs) for long-term recommendation. The key to achieving the target lies in formulating a guidance plan following principles of enhancing long-term engagement and grounding the plan to effective and executable actions in a personalized manner. To this end, we propose a Bi-level Learnable LLM Planner framework, which consists of a set of LLM instances and breaks down the learning process into macro-learning and micro-learning to learn macro-level guidance and micro-level personalized recommendation policies, respectively. Extensive experiments validate that the framework facilitates the planning ability of LLMs for long-term recommendation. Our code and data can be found at this https URL
Submission history
From: Wentao Shi [view email][v1] Thu, 29 Feb 2024 13:49:56 GMT (2358kb,D)
[v2] Fri, 26 Apr 2024 07:41:07 GMT (3454kb,D)
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