http://reply.papertrans.cn/2/165/16430/16430-31.png
http://reply.papertrans.cn/2/165/16430/16430-32.png
Submitted on: 30 September 2022.
Revised on: 03 January 2023.
Accepted on: 09 February 2023.
___________________JOURNAL OF ECONOMIC LITERATURE
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http://reply.papertrans.cn/2/165/16430/16430-35.png
Submitted on: 22 February 2017.
Revised on: 17 March 2017.
Accepted on: 28 March 2017.
___________________JOURNAL OF ECONOMIC LITERATURE