413047-Underground-Commercial-Sex-Economy

Additionally, for each city we introduce upper and lower bound ratio constraints on the relative
change in the cash-based drug economy of from to .
This yields a homogeneous system of
which concern relative sizes of cash-based drug economies.
linear ratio inequalities on the 14 variables
An Example of Drug Proxy-based Ratio Constraints
The tables below (Table 3.14 Cross-city Drug Proxy Ratios) list the cross-city ratios of the drug proxy , in 2003 and
2007. The table tells us, for example, that in 2003 the proxy for the underground cash-based drug economy in Seattle
( was 0.50 times what it was in Atlanta ( . This single ratio entry would give rise to two linear constraints:
The next table (
Table 3.15 Cross-Year Drug Proxy Ratios) lists the cross-year ratios of the drug proxy (value in 2007 over the
value in 2003). The table tells us, for example, that the underground cash-based drug economy in San Diego in
2007 was 6% higher than it was in 2003. This single ratio entry would give rise to two linear constraints:
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