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JointCTR: a joint CTR prediction framework combining feature interaction and sequential behavior learning
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DOI：10.1007/s10489-021-02678-8.png)
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Abstract
En 中文
Click-through rate (CTR) is a positive feedback of user preferences or product purchases, and its small increase can bring huge benefits. Therefore, CTR prediction plays a key role in computing advertising and recommendation systems. Research shows that the accuracy of CTR prediction models is closely related to the input features. Existing related models usually focus on certain aspects of features, such as second-order interactions or temporal changes, and ignore the diversity of features. In this paper, a modular click-through rate prediction framework JointCTR is proposed. The framework integrates four types of prediction models, each of which learns different types of features, including original features, embedded features, interactive features, and sequential features. According to actual application scenarios, these models can be assembled or removed flexibly, and models of the same type can be replaced by each other. In order to avoid the impact of data diversity, sparsity, and high-dimensional features, an embedding layer is added to the framework to achieve unified embedding processing for different data types. To learn sequential behaviors, we propose a model SeqCTR based on the attention mechanism to capture the dynamics of user interests in the framework. To better learn high-order features, we apply HorderCTR proposed in our previous work to the framework to automatically identify high-value feature combinations. Extensive experiments on four public datasets show the effectiveness of the proposed framework, which yields competitive performance compared to state-of-the-art models (the AUC increases by + 0.24% on MovieLens-1 M and 0.85% on Criteo). Almost all different types of popular models can be assembled into it, that shows the flexibility and scalability of the framework.
Keywords:
Click-through rate prediction
Feature embedding
Feature interaction
Sequential behavior
Framework
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