For 10 points - identify this nonpartisan public policy institution, the oldest of the "think tanks."
This organization took its current name in 1927 after the St. Louis businessman who encouraged it to concentrate on economic research.  Its early work concluded that FDR's National Recovery Administration had done more harm than good; however, it was also involved in establishing Social Security's accounting system and organizing the Marshall Plan.  Established in 1916 as the "Institute for Government Research," in recent years it has come to be considered slightly left-of-center.  For 10 points - identify this nonpartisan public policy institution, the oldest of the "think tanks."
This organization took its current name in 1927 after the St. Louis businessman who encouraged it to concentrate on economic research.  
Brookings Institution