???? BK21 ????? Hajime Tomura ??? (Hokkaido University)? ??? ???? ??? ?? ????? ??? ?? ??? ????? ?????? ?? ??? ?? ????.
{??????? ??? ????? ???.}
------------------------ ? ?-------------------------
? ? : 11? 23? ??? ?? 4?
? ? : ?????? 201?
? ? : On the Existence and Fragility of Repo Markets