By Li Hongbin   Li Lei   Wu Binzhen   Xiong Yanyan   in The Journal of Economic Perspectives

ISSN:0895-3309|26|4|57-74

American Economic Association‎(2012)‎

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By Chen Depin   Xiong Yan   Yan Jun   Xue Gui-Rong   Wang Gang   Chen Zheng   in Information Retrieval

ISSN:1386-4564|13|3|236-253

Springer Publishing Company ‎(2010)‎

Access to resources Favorite 1.8141761