I read like 3 or 4 articles on that experiment and they never disclose what exactly happened with productivity. Looks like there is nothing to brag about. Too

I read like 3 or 4 articles on that experiment and they never disclose what exactly happened with productivity. Looks like there is nothing to brag about. Too bad The Economist doesn't question that at all, the whole staying on the same pay deal depends on 11% productivity increase.