Cultural differences play a large part in this pattern.

On a pro team, sometimes the only difference between a starter and a sub is playing time.

The president gave age as the reason, but philosophical differences with Hand may also have played a part.

The split was amicable, but "creative differences" did play a role.

When food became scarce, this difference may have played a major role in the Neanderthals' extinction.

Ethnic, religious, social and national differences play no role in sport.

Ethnic differences may also play a role, although they are not in themselves the cause of the basic economic and political problems.

I think that the difference will play less and less of a role in future.

However, the difference between production, trade and consumption also plays a major role.

But in other areas, cultural differences played a clear role in student achievement.