Reference
- Whiteford , Andrew H. , ed. 1967 . A Re‐appraisal of Economic Development: Perspectives for Co‐operative Research , Chicago : Aldine Publishing Company .
- Professor of Economics, University of Durham. The debts of gratitude incurred in writing this Note are out of all proportion to its length! The author is grateful to Julian Bharier, Arthur Hazlewood, Michael Lipton and—most of all—to Pramit Chaudhuri for greatly improving the original draft. If mistakes remain, they are almost certainly the author's responsibility.