1

James J. Heckman,1976, "The Common Structure of Statistical Models of Truncation, Sample
Selection and Limited Dependent Variables and a Simple Estimator for
Such Models,"

The Annals of Economic and Social Measurement (Dec., 1976).

2

【作者】Quizon, J. B.

【文题】Factor Input Demand and Output Supply Elasticities in Philippine Agriculture

【期刊名，年份，卷（期），起止页码】Philippine Economic Journal.20(1981): 103-26.

3

【作者】Xu Fei and Takeya Hiroyuki.

【文题】Fee-charging Extension In China: Implications and Function

【期刊名，年份，卷（期），起止页码】Journal of Extension Systems, 2000,16:1, June, 58-67.

[此贴子已经被作者于2008-4-30 16:58:14编辑过]