Age-Period-Cohort Models: Approaches and Analyses with by Robert O'Brien PDF

By Robert O'Brien

ISBN-10: 1466551534

ISBN-13: 9781466551534

ISBN-10: 1466551542

ISBN-13: 9781466551541

Age-Period-Cohort versions: techniques and Analyses with combination info provides an creation to the issues and techniques for modeling age, interval, and cohort (APC) results for aggregate-level information. those options contain restricted estimation, using age and/or interval and/or cohort features, estimable capabilities, variance decomposition, and a brand new procedure known as the s-constraint approach.

summary: Age-Period-Cohort versions: methods and Analyses with combination information offers an advent to the issues and methods for modeling age, interval, and cohort (APC) results for aggregate-level facts. those innovations contain limited estimation, using age and/or interval and/or cohort features, estimable services, variance decomposition, and a brand new approach known as the s-constraint process

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Additional resources for Age-Period-Cohort Models: Approaches and Analyses with Aggregate Data

Example text

Integrating these approaches in one book and emphasizing both the geometry and algebra of several APC approaches, puts the researcher in a stronger position when judging the strengths and weaknesses of these methods. This should facilitate better research and better interpretation and evaluation of existing research. Introduction to the Age, Period, and Cohort Mix 19 References Alwin, D. 1991. Family of origin and cohort differences in verbal ability. American Sociological Review 56:625–38. L. Miller.

Multiple Classification Models and Constrained Regression 29 0 This line is established by finding one point on the line (for example, bc1 ) and the direction of the line. A solution to the normal equations is a point on the line in multidimensional solution space and v (the null vector) is a direction of the line in multidimensional space. Any solution bc0 on the line of solutions is a solution to the normal equations. To establish that the only solutions to the normal equations lie on this line, we note that the design matrix for the APC model (X) is rank deficient by one; therefore, there is only one null vector v (which is unique up to multiplication by a scalar).

Chapter 2 examines what might be labeled the beginning of the modern statistical approach to the APC problem that includes all three of these factors in a single model and uses constrained estimation to find a solution. Unfortunately there is an infinite number of solutions due to the linear dependency between age, period, and cohort. Because the estimates of the individual effect coefficients in the APC model depend upon the constraint used, there needs to be a credible reason for selecting a particular constraint.

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Age-Period-Cohort Models: Approaches and Analyses with Aggregate Data by Robert O'Brien


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