Experimental Design: Product Diversity

Problem:
- 1200 titles, but small local audiences
- hard to control for disciplinary culture, funding models, &c.
Approach: selected disciplines w/high Elsevier presence
- Engineering: ~69 titles subscribed, ~$1000/title
- Economics: ~13 titles, ~$900/title
- Chemistry: ~33 titles, ~$3000/title
- Medicine: ~134 titles, ~1200/title