The labour productivity of mining industry in Chile was increase d by a big margin ascribed by(1) the obvious improvement on copper deposite qua lity and(2) a vigorous push by technological transformation and innovations.

• 过去20多年智利采铜业的劳动生产率大幅提高,原因有二:一是随着新矿山的开发,铜矿床质量明显提高;二是技术改造和技术革新的推动。