Who is Allowing Stem Cell Research?
In the US, California is singled out because of its Proposition 71 that provides a state constitutional right to pursue stem cell research. It's important to note that permissive stem cell research policies do not necessarily imply scientific leadership; the US, after all, has more genome sequencing centers than any other nation.
The site has several other maps showing different types of scientific, technological and economic leadership throughout the world.
Source: Future Salon