21  Supervised Document Scaling

21.1 Objectives

• Introduction to the notion of document scaling. Difference from classification, which we cover in Chapter 23.
• Supervised versus unsupervised methods
• Wordscores
• Class affinity model

21.2 Methods

Applicable methods for the objectives listed above.

21.3 Examples

Examples here.

21.4 Issues

Training documents and how to select them.

Uncertainty accounting.

21.5 Further Reading

Additional resources from libraries or the web.

21.6 Exercises

Add some here.