Moment-based method identifies regression coefficient beta and LDA concentration alpha_0 from response-weighted corrected word moments and commutativity, without per-document topic estimation.
Hannes Mueller and Christopher Rauh
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Moment-Based Inference for Regression with Latent Dirichlet Covariates
Moment-based method identifies regression coefficient beta and LDA concentration alpha_0 from response-weighted corrected word moments and commutativity, without per-document topic estimation.