I have posted document scaling results on different dimensions such as political left-right, and immigration positive-negative on this blog previously, but I did not explain the detail of the technique, call the Latent Semantic Scaling. The LSS is a type of lexicon expansion technique based on the Latent Semantic Analysis. Please have a look at my paper for the detail.
Update on 24/12/2020: changed the link to the published paper.
