Obama's Coming Stem-Cell Decision May Not Jump-Start Research

Eight years ago, President George W. Bush sharply limited federal support for stem-cell research. The move cost universities millions of dollars while slowing the hunt for life-saving medical advances. And it may now be only days before President Obama reverses course.

But for all the trouble the presidential restriction has caused, and for all the political trauma that may accompany a cancellation of Mr. Bush's order, both the science and the economics have evolved so far

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