【作者(必填)】Petter Frenger

【文题(必填)】Using the directional shadow elasticity of substitution to measure the concavity of the cost function

【年份(必填)】Economics Letters   [size=13.333333015441895px][url=http://www.sciencedirect.com/science/journal/01651765/19/2]Volume 19, Issue 2[size=13.333333015441895px], 1985, Pages 171–175[/url]
【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/0165176585900151