Instruct: Classify a review as either positive or negative.
Query: cross cultural comparisons

The book benefits from cross cultural studies of American and British urban environments. In both cases, we see that a neighbourhood has an informal but usually well defined and recognised meaning and boundary to its inhabitants and to those of adjoining areas. At the most basic level, this fulfills the existence criterion. A neighbourhood has to exist, in order for any other meaningful discussion and analysis about it to be valid.Keller then looks at how a neighbourhood can be demarcated. What can give rise to a distinctive nature of a given neighbourhood. Some aspects might be a local sporting team, or a retail area separate from other areas in the overall city. Or one of more ethnic groups that aggregates in a region.