Interaction data available at variety of scales in UK (OA to Region), although more variables available at coarser scales.

• Interaction data available at variety of scales in UK (OA to Region), although more variables available at coarser scales.

• Census provides more variables at a wider range of scales than any other data source in the UK.

• Finer grained data less attribute rich and more prone to small count perturbation.

• A classification of coarser areal units may encourage more false ecological inferences.

• Data at some levels not available for same units of measurement in UK (districts – Britain, Parliamentary constituencies – NI).

Notes:

False ecological inference