There’s been a lot of discussion here about genetically modified foods and related issues. My view has been that the current state of scientific evidence does not support a general ban on GM foods but that consumers may reasonably want to be informed about whether the food they are consuming has been produced using technologies they may object to, either on ethical grounds, or because they are unconvinced about the safety of GM technology. In this respect, I’ve been very critical of Monsanto, which pushed hard to get GM foods onto the US market without any labelling requirement. Among other things, I thought this likely to be a counterproductive strategy, intensifying hostility to GM technology.
Some of my more free-market readers have argued against me on labelling suggesting that, if consumers want this information, market processes will ensure the emergence of a GM-free label. Thinking about it in the abstract, this will be true if the consumer preference for non-GM food is strong enough. And if consumers don’t care at all, then labelling won’t make any difference. There’s an intermediate zone where the choice of labelling regime might make a difference, and this has led me to support compulsory labelling.
These speculations can now be confronted with some real-world experience, with some very interesting results. As well as GM foods, Monsanto markets Posilac, a synthetic version of bovine growth hormone for cows that increases milk yields. Farmers producing milk without Posilac have advertised the fact, and have been very successful in capturing market share.
As a result, Monsanto, through a front group, Afact, is now lobbying legislatures to ban the advertising of non-BST milk. Their argument is that, since there is no scientifically demosntrable difference between the two products, advertising the way in which they are produced can only mislead consumers. So now it’s the pro-GM side who are arguing for intervention to suppress information they think consumers can’t handle.