【作者(必填)】Attfield, C. L. F

【文题(必填)】"Estimation of a Model Containing Unobservable Variables Using Grouped Observations: An Application to the Permanent Income Hypothesis"

【年份(必填)】1977

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/0304407677900549
第二篇：
【作者(必填)】Robert B Avery

【文题(必填)】Modeling monetary policy as an unobserved variable
【年份(必填)】1979

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/0304407679900861