At age 42, the father of a son and two daughters, he assiduously went off to the United States to study for a doctorate, earning it three years later with a paper of more than 400 pages called Intersectoral Capital Flows in the Economic Development of Taiwan.
在他四十二歲、育有一子二女後，還孜孜赴美攻讀博士，並於三年後以一篇厚達四百頁的「台灣農工部門間資本流通」論文，獲得學位。