text:  But Card wasn't convinced that that's what would happen. When he digs into the data, he finds something surprising. A few years after the Cubans arrive, there is basically no impact on employment or wages. Nothing. Card, being humble and precise, says nothing isn't quite right. Well, of course, that's not what you would really say if you're writing a scientific paper. What you would say was there's no detectable effect. How would you explain that all of these people show up and that there's no detectable effect?