Appendix A
Comparison of Recent Prize Competitions

TABLE A-1 Comparison of Recent Prize Competitions


NASA Centennial Challenges

DARPA Grand Challenge 2004, 2005, 2007

NAE Grainger Challenge

Ansari X-Prize


Technology for space exploration

Autonomous vehicles

Arsenic removal from water supply in LDCs

Private space travel


Variety of annual and one-time challenges (generally best in class)

Annual or biannual races

One-time prize (best in class)

One-time prize (best in class)

Prize purse

$200,000-$2.5 million (prize amounts to increase over time)

$1 million per race

1st $1 million

2nd $200, 000

3rd $100, 000

$10 million

Federal employee eligibility


Yes (using free time)

Yes (using free time)


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