Thank you for your reply. Then, I have two further questions on this: 1. Why this ''imports-from-a country itself'' only happens after around 2001? You may check the data, there is no such problem for early years. 2. I've noticed that your export data acturally includes ''re-exports'' as well, why there is no such problem for exports at all? ...

Hi, anyone could explain the following dataset drawn from UNcomtrade?  Is there anything wrong with the database?   Period Trade Flow Reporter Partner Code Trade Value NetWeight (kg) Quantity Unit Trade Quantity Flag 2002 Import Thailand Thailand TOTAL $950,559,887 ...

http://comtrade.un.org/db/  Here is the error message: (It's been showing this message this entire afternoon....) Server Error in '/db' Application. Server Too Busy Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error ...