3

1. The role of high-tech capital in driving productivity growth. 2. The role of public capital in driving private productivity growth. 3. Sectoral, regional and aggregation issues. Should Sydney pay for Brisbane’s roads? 4. Issues in measurement and possible ways forward. 1 Note: There are similar issues relating to high-tech and public capital, such as the following: • Network externalities may mean that local high-tech investment has positive effects country wide, e.g. new computer system at the head office. Same with public capital; highway infrastructure would be expected to have positive spillover effects. • Alternatively, high-tech investment and public infrastructure may have strictly local benefits (“point infrastructure”). May also be overlap; public wireless network for downtown Philadelphia