Soda consumption was reduced immediately after a soda tax had been elected in Berkeley, months before the tax was actually introduced
The soda debate: reduced consumption following tax election - health short science news

Soda sales in Berkeley (USA) dropped immediately after the soda tax bill was passed in November 2014. This drop, equaling between 10 and 20 percent, occurred months before the tax was introduced and soda prices went up.

A new study shows that the election of soda tax, and the vigorous campaigning around the tax that led up to the vote, also may have played a major role in changing drinking habits.

Thus, to change habits, prices matter, but information is also important, at least in the soda debate.

Read the full story: UC Berkeley
Scientific publication: Economic Inquiry