Here's an interesting paper about the dominance of top economics graduate schools in placing their graduates into professorship positions at top economics departments in the US and abroad.
Look up on Social Science Research Network (SSRN)----The Path to Being an Economics Professor: What Difference Does the Graduate School Make? by Zhengye Chen
The top 15 departments get almost 60% of their faculty from the top six schools! and almost 2/5 from harvard+mit
Look up on Social Science Research Network (SSRN)----The Path to Being an Economics Professor: What Difference Does the Graduate School Make? by Zhengye Chen
The top 15 departments get almost 60% of their faculty from the top six schools! and almost 2/5 from harvard+mit