The solar industry is booming. During the past decade PV shipments have grown by three orders of magnitude. In 2010 shipments were up over a hundred percent on 2009. How to account for this explosive growth? Though success has a thousand fathers, most analysts agree that the trigger was Germany's solar feed-in tariff, first enacted in 2000 then turbocharged in 2004. Who deserves the credit for this extraordinarily effective policy mechanism? . .