A Variance Shift Model for Detection of Outliers in the Linear Measurement Error Model

Abstract EN

We present a variance shift model for a linear measurement error model using the corrected likelihood of Nakamura (1990).

This model assumes that a single outlier arises from an observation with inflated variance.

The corrected likelihood ratio and the score test statistics are proposed to determine whether the i th observation has an inflated variance.

A parametric bootstrap procedure is used to obtain empirical distributions of the test statistics and a simulation study has been used to show the performance of proposed tests.

Finally, a real data example is given for illustration.