Incomplete Tables, Separability and Collapsibility

Erling B. Andersen
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Erling B. Andersen: University of Copenhagen, Department of Statistics

Chapter 7 in The Statistical Analysis of Categorical Data, 1994, pp 212-238 from Springer

Abstract: Abstract An observed contingency table is incomplete if it contains zeros in certain cells. Such zeros are of two types, random zeros and structural zeros. A cell has a random zero, if the observed value in the cell is zero, but the expected value is positive. A cell has a structural zero if the expected number is zero, i.e. if it is known a priori that the cell will contain a zero. Random or structural zeros does not impaire the log-linear structure of a given model. It means, however, that certain log-linear parameters can not be estimated.

Date: 1994
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DOI: 10.1007/978-3-642-78817-8_7

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