Some countries have more than one national association due to regional or language differences.

But he says the reasons behind the regional differences are far from clear cut.

There are significant regional differences across the country with regard to place and time when water is available.

There were large regional differences in the results, and no national referendum has been hold ever since.

We're far more used to having our own way, and we have regional differences.

There were marked regional differences in the choice of the most important economic problem.

There were regional differences within this overall national picture, however.

It takes no account of regional differences in health care costs.

It is also important to take regional differences into account.

There are at least two major regional differences between the 1970s and now.