ACCOUNTING FOR INCREASING LAND‐LABOUR RATIOS IN DEVELOPED COUNTRY AGRICULTURE
研究了美国小麦生产中土地-劳动比率上升的原因，发现偏向性技术变革而非要素替代是主要驱动因素，对理解农业规模扩大有参考价值。
This paper investigates the causes of past increases in land‐labour ratios and farm size by attempting to determine the contributions of factor substitution and technical change. The role of technical change in agricultural development has attracted considerable attention in development circles for some years. More recently, technical change versus factor substitution has become an issue in the US agricultural economics literature. The conventional approach followed in this study leads to the conclusion that in US wheat production the considerable increase in land‐labour ratios is attributable to biased technical change rather than factor substitution.