Take the following as truth: Neither Martinique nor Guadeloupe enjoy duty-free status (apart from the duty-free shops at the airports), but almost everything from France is sold at mainland French prices, well below what the items would cost in North America.
Then the following statement: "Products in France are much cheaper in order to draw tourism away from more popular locations such as Martinique and Guadeloupe." is true, false, or inconclusive?