In this article on Property Observer he discusses whether stronger capital growth is seen in inner Sydney, the middle or outer ring, or the remainder of the city and state.
His results were very conclusive.
Inner Sydney consistently outperforms due to the inherent scarcity of land.
An impressive array of data sets, and it's hard to imagine a more conclusive or clear-cut outcome:
The Reserve Bank itself carried out extensive analysis into similar issues and concluded that not only is employment growth, population growth and dwelling price growth focused in the inner areas of capital cities, these trends are actually accelerating rather than reversing, as documented in more detail here.