Many of the underlying factors that created the conditions for last year's riots remain in place.

Using this technique you can identify the underlying factors that explain the statistics.

In the longer term, however, underlying factors such as a lack of housing for buyers to choose from in the capital will still push prices upwards.

Sector considerations aside, there are broader underlying factors that explain why size has mattered in 2007.

We can often find unexpected underlying factors, especially affective factors through diary studies.