Haskell vs. Ada vs. C++ an Experiment in Software Prototyping Productivity (1994) [pdf]
There might be many biases in this research. If one is able to write code in Haskell it tells a lot about them, and he might be a better programmer than one who writes in Ada or C++.<p>To make this research unbiased we need to do the following:<p>* Take people who are profecient in Ada, Haskell and Ada<p>* Randomly assign them to different teams<p>* Compare their results