Regional or Regionally

Whis one is correct?

"Think regional act local" or "Think regionally act locally"?

Thanks.

Use the adverbial (-ly) form, because the words in question are adverbs. Unless you're American, in which case adverbs are entirely optional. ;)

There can be a subtle difference here between the use of 'regional' and 'regionally', depending on what the writer has in mind and how the readers interpret it. The utilisation of either an adjective or adverb is correct.

I see 'think regional' as an abbreviation for 'think of the regional area', telling me to be considerate of the region, whereas 'think regionally' means think with a regional mind-set.

This idea could be likened to 'think slow' versus 'think slowly'. The former (think slow) means think of slow things, whereas the latter (think slowly) means to think carefully.

Only 'act locally' appears correct but 'act local' could be used as a gimmick to match 'think regional'.

<<Unless you're American, in which case adverbs are entirely optional.>>

Umm...only if you're a hick "from da South".

So, it means that both are correct? Depending on the context?

For the sake of an official 'English' exam, it would probably be wise to use regionally/locally.