An important point (somewhat overlooked in the comments) is that it is not necessary to sell the humane eggs at the same price as factory eggs for this to work. You can start issuing certificates straight away, not changing anything in the distribution process!
It is even better, because it will provide incentive for competition between humane eggs producers. And also, having humane eggs still labeled as “humane”, it will help them to drive factory eggs out of the market, by allowing them to have a lower profit margin. In a sense, it is similar to tax reliefs for an industry we want to stimulate, just organized in a perfectly libertarian way.
I think this is not true. If the eggs are sold as humane eggs then they will be bought by consumers who would otherwise purchase a certificate-free humane egg, so the egg certificate no longer represents one fewer cage egg being produced.
An important point (somewhat overlooked in the comments) is that it is not necessary to sell the humane eggs at the same price as factory eggs for this to work. You can start issuing certificates straight away, not changing anything in the distribution process!
It is even better, because it will provide incentive for competition between humane eggs producers. And also, having humane eggs still labeled as “humane”, it will help them to drive factory eggs out of the market, by allowing them to have a lower profit margin. In a sense, it is similar to tax reliefs for an industry we want to stimulate, just organized in a perfectly libertarian way.
I think this is not true. If the eggs are sold as humane eggs then they will be bought by consumers who would otherwise purchase a certificate-free humane egg, so the egg certificate no longer represents one fewer cage egg being produced.