Key points are not available for this paper at this time.
Editor's Preface. Introduction. 1. Societal Multilingualism. 2. Diglossia. 3. Qulaitative Formulae. 4. Statistics. 5. Quantitative Analysis. 6. Language Attitudes. 7. Language Choice. 8. Language Maintenance and Shift. 9. Language Planning and Standardization. 10. Language-Planning Cases. 11. Vernacular Language Edition. Bibliography. Index.
Goldin et al. (Tue,) studied this question.