Taxes on sugary drinks now operate in more than fifty countries.
agree on the immediate effect and argue about the rest.
of taxed drinks fall, typically by around a tenth per ten percent of price.
The design that produced the largest change was not the tax on consumers.
Britain taxed by sugar content and announced it two years in advance.
Most producers their drinks before the tax began.
Sugar in the average soft drink fell without shoppers changing any habit.
That result is unusual in public health, where behaviour change is normally the .
fall into two groups.
The first is that such taxes take a larger share of income from poorer households.
The reply is that those households also carry more of the disease and gain more from the change.
The second is , since a shopper may simply buy something else that is sweet.
Evidence on is mixed, which is a reason to tax sugar broadly rather than one product.