抄録

競争と経済成長に関して,Schumpeter(1942)以来,大企業は小企業よりもより技術革新的/集中的な産業における企業はより技術革新的という2つの異なる方向での理論的・実証的な分析がある.本稿は,深尾ほか(2003)のデータを用いて,セクター別に競争と経済成長の関係を検証した.結果としては,市場の競争が激しくなくなったセクター(独占度が高まったセクター)で,生産性の上昇をもたらす傾向が見られ,これは比較的TFP成長率が一定以上のセクターで,またその変動が激しくないセクターで見られた.

abstract

Regarding competition and sector growth, there are two different ways of theoretical and empirical studies since Schumpeter (1942) ; first, larger firms are more innovative than smaller firms ; second, firms in concentrated sector are more innovative than firms in not concentrated sector. This paper examines the latter aspect that is the relationship between competition andsector growth, sector by sector, by using data of Fukao, et al. (2003). Main result of this paper is that sectors of competition decreasing (sectors become concentrated) tend to raise the sector's productivity. This feature is likely to be seen in higher TFP growth sectors and smaller TFP growth's volatility sectors.