Behavioural economics teaches us that the jump from a price of zero to a price of 1 penny has a much, much larger effect than going from 1 penny to two pence.

Behavioural economics teaches us that the jump from a price of zero to a price of 1 penny has a much, much larger effect than going from 1 penny to two pence. https://market.subwiki.org/wiki/Zero_price_effect https://market.subwiki.org/wiki/Zero_price_effect The same acts in reverse. I personally reuse the same bag every time I go shopping until it is damaged. When I walk to my local, I carry the two or three items I bought directly, rather than in a bag. I could afford to buy over a million plastic bags a year, yet I've changed my behaviour to avoid buying them whenever possible. (In my case, it has nothing to do with being asked, as I invariably use the automated checkout machines. Bags are available for purchase adjacent to these machines, so it's not an availability problem either.)