物質循環型地域の経済評価
本研究は愛知県を対象とした,筆者らの経済-物質循環システムに関する既存研
究を大幅に拡張したものである。具体的には,既存の経済-物質循環CGEモデ
ルにおいて,バージン財と再(生)利用財を差別化し,再(生)利用活動を明示化す
るとともに,用いているデータも可能な限りその精度の向上を図った。新たなモ
デルを用いて愛知県のゼロエミッション化のシミュレーション分析を行った。そ
の結果,再(生)利用財価格は18%から95%下落しなければ,100%の再(生)利用
は実現できないことが判明した。またその一般均衡効果として,産業構造は再(生)
利用財に代替される素材系産業が縮小し,財価格下落に伴う代替効果から農業や
食料品産業が拡大し,また需要構造変化によって加工組立系産業,第3次産業な
ども拡大することが確認された。
This article aims to significantly extend the authors' previous study
that deals with the interaction between material circulation and economic
activities in Aichi Prefecture, Japan.Significantly differing from the previous
study, virgin and recycled goods are discriminated, recycling activities are
internalized, and used data are reestimated for improving the data reliability
in this paper. Applying this new model, some simulation analyses are
implemented in order to examine the economic
possibility of zero emissions
oriented society in Aichi Prefecture. From
the simulation results, one
can see that prices of recycled goods should fall by 18% to 95% so as to realize
the 100% of recycling. Moreover, as significant general
equilibrium effects, the following results
are also obtained. Economic
activities of raw material producing industries are reduced being substituted
by recycling activities, agricultural and
food processing industries
expand due to the substitution effect of
price down, and finally,
machinery processing and the tertiary industries also grow due to a change
of commodity demand structure.