Clark Prize winner, smart and diligent. The doctoral thesis has written seven chapters, while the average person only writes three chapters, and some even 1 graduate. Up to now, about 10 papers are published in top and quasi-top journals every year, which is quite scary. Few economists have made achievements in several fields, including new political economics and new growth economics. The former studies the interaction between political power and economy and has several important theoretical and empirical articles. The latter focuses on technological change. In addition, there are some overlapping papers in other fields (such as sociology), which embodies economic imperialism.