Dr Mike Patefield When two or more variables are measured with error in all variables the relationship between them can no longer be modelled using regression techniques.
Functional relationships are models which allow for errors in the variables.
However, the iteratively re-weighted iterative technique can fail with weights approaching zero. The second aim of the project is to devise an improved method of estimation. Measurement error models. Estimating Equations and Non-linear Functional Relationships. Multivariate Linear Relationships.