1. Economic Appraisal of Transport Projects;Adler,1987
2. Is public expenditure productive;Aschauer;Journal of Monetary Economics,1989
3. Does public capital crowd out private capital;Aschauer;Journal of Monetary Economics,1989
4. Measuring the contribution of public infrastructure in Sweden;Berndt;NBER, WP,1991
5. The Practice of Transport Investment Appraisal;Button,1983