Engström starts with a model of taxing what he calls "diamond goods" —goods that have no value except for their costliness. Taxing these goods ad nauseam is an efficient method of taxation, according to this model, because people value the good more as its after-tax price increases.
Engström focuses his analysis on a specific type of diamond good, "bling bling," which he defines as the following:
…the very extreme kind of ornamentation that hip hop artists often display. It could consist of very heavy gold chains with massive dollar signs (euro signs have lately come in fashion since the late fall in dollar price), diamond encrusted ipods, or surgically removing all your teeth and replacing them with asymmetric chunks of diamond adorned gold.
