The Sensitivity of the Intrinsic Estimator to Coding Schemes: A Comment on Yang, Schulhofer-Wohl, Fu, and Land

Liying Luo, James Hodges, Christopher Winship & Daniel Powers
The Intrinsic Estimator (IE) has been proposed to address the age-period-cohort problem and is believed by many to yield robust and reliable estimates. We, however, show that IE estimates are highly sensitive to one’s choice of coding scheme or model parameterization. We reanalyze data from published articles to demonstrate that estimation results using one coding scheme (e.g., the zero-to-sum coding) can be dramatically different from those obtained using a different coding scheme (e.g., reference group...
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