The maker was Essaness, Australia
To identify the defining characteristic of a case-control study, review the process where cases (patients with lung cancer) are compared to controls (patients with other disorders) based on their smoking habits
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Output and quality depended heavily on the skill of the individual roller, which meant no two batches were ever quite identical, and a single experienced worker could typically produce only a few hundred cigarettes in a full working day
Unique insight: Cigarette design (filters, paper, and ventilation holes) affects the mix of chemicals released
Stewart, executive director of the Interstate Revenue Research Center, summed it up in 1975: "These smugglers are very knowledgeable of individual state statutes, regulatory processes, and systems used to monitor or enforce cigarette tax laws