12 IZA Discussion Papers
IZA Discussion Paper No. 15283
IZA Discussion Paper No. 14033
IZA Discussion Paper No. 13902
IZA Discussion Paper No. 13319
IZA Discussion Paper No. 12483
published in: Vaccine, 2021, 39 (21), 2886-2893
IZA Discussion Paper No. 10895
IZA Discussion Paper No. 10605
IZA Discussion Paper No. 9684
IZA Discussion Paper No. 9647
published in: Energy Economics, 2017, 62, 283-290
IZA Discussion Paper No. 9332
修改后的版本发表在:Applied Economics, 2017, 49 (14), 1440-1457
IZA Discussion Paper No. 8082
IZA Discussion Paper No. 5783
published in: SERIEs - Journal of the Spanish Economic Association, 2015, 6(4): 407-439.
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