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PARK, TAESUNG 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 1993 기초과학연구 Vol.3 No.-
Liang and Zeger (1986) proposed a generalized estimating equations approach to the analysis of longitudinal data. Their analyses have assumed that missing observations are missing completely at ransom in the sense of Rubin (1976). However, when this assumption does not hold, their analyses may result in biased results. In this paper, we develop a simple and practical test procedure for testing this assumption. The proposed test is an extension of the test of Little (1988).