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THE (WICKED) PROBLEM
TIER 1
TIERS 2-3
TIER 4
TIER 5
Population
in Millions
75-100
1,500-1,750
4,000
Purchasing Power Parity
in US Dollars
> $20,000
$1,500-$20,000
$1,500
<$1,500
Introduction DREAMdev \ 4
C. K. Prahalad’s Fortune at the Bottom of the Pyramid (2006)