但我想 似乎不是那么简单就能求到的 因为这个数据库需要机构或者个人花重金买了UN Comtrade的权限,然后 就免费了。
可以仔细研究一下就立刻明白
注册界面有这个提示:
Declaration | I declare on my honor that my institution is a subscriber to COMTRADE. I claim any legal responsibility for a false declaration. I agree that my information may be sent to COMTRADE for verification. |
然后你点进
Authorization code |
然后你就会发现提示了:
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You don't have enough right to access this page ... To send the error report to us Please include all of the error messages and a brief description of what you did to produce the error. Note This error has been automatically recorded in our database to be investigated further. |
你就会看到一个定价表
Premium access to UN ComtradeThere are occasions when a user may require premium service to obtain trade data. These could include bulk download of millions of records or special professional assistance. In this regard, a fee will be charged to cover the costs of providing such services. | ||||||||||||||||||||
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*All premium access options have a time frame of one year counting from the day of activation. **When data are streamed via web services. |
页面最下方有一堆橙色的提醒
Free access to BACI database (for Premium Individual License and Site License)BACI database is an international trade database from CEPII
综上所述,只有拿到Premium Individual License(不差钱的学术大咔,每年费用900刀)或者Premium Site License(有学术抱负的科研机构,每年费用6000刀)才可以免费进BACI数据库。亲们!注意,有效期从激活开始一年内有效啊!!!
祝各位科研顺利!