http://reply.papertrans.cn/1/58/5776/5776-11.png
http://reply.papertrans.cn/1/58/5776/5776-12.png
http://reply.papertrans.cn/1/58/5776/5776-13.png
http://reply.papertrans.cn/1/58/5776/5776-14.png
http://reply.papertrans.cn/1/58/5776/5776-15.png
http://reply.papertrans.cn/1/58/5776/5776-16.png
Submitted on: 12 January 2017.
Revised on: 10 April 2017.
Accepted on: 04 June 2017.
___________________Cliometrica---SPRINGER HEIDELBERG
Submitted on: 25 May 2020.
Revised on: 18 June 2020.
Accepted on: 06 July 2020.
___________________Cliometrica---SPRINGER HEIDELBERG
http://reply.papertrans.cn/1/58/5776/5776-19.png
Submitted on: 02 July 2017.
Revised on: 09 August 2017.
Accepted on: 02 October 2017.
___________________Cliometrica---SPRINGER HEIDELBERG