1. Akai, Noburo (2006), Economic analysis of public organization and governance, Tokyo: Yuhikaku. Written in Japanese.
2. Chihokomuin Kyuyoseido Kenkyukai (2006), Chihokomuin kyuyo no jittai (The actual conditions of local civil servant’s salary), released May. Written in Japanese.
3. Chiho Zaimu Kyokai (2006), Shikuchoson betsu kessan jokyo shirabe (Investigation of settled accounts by municipalities), released April. Written in Japanese.
4. Chiho Zaimu Kyokai (2006), Chihokomuin kyuyo no jittai (The actual conditions of local civil servant’s salary), released May. Written in Japanese.