ISBN-13: 9780803922655 / Angielski / Miękka / 1984 / 94 str.
Where an assumption of unidirectionality in causal effects is unrealistic, 'recursive' models cannot be used, and complex 'nonrecursive' models are necessary. But, many nonrecursive models are 'unidentified', which makes meaningful parameter estimation impossible. This book explains the concept of identification and the factors that lead to it.