Stephen Richards

Deduplication is an essential part of data preparation for statistical modelling. The phenomenon of multiple policies per person is a major issue for annuity portfolios, and arises from life companies' policy-orientated view of the world.

Or do you know someone who is? Some people are uncomfortable with the idea of statistical models, especially ones with parameters.

There is some degree of confusion over what people mean by "postcode" when applied to modelling mortality in the United Kingdom. There are varying ways of using postcodes, depending how much of the full postcode is actually used.

Deduplication is an important step in data preparation for mortality modelling (or any other kind of modelling for that matter). If people in your data set have multiple benefit records, then the crucial independence assumption for statistical modelling in invalidated.