Everybody has missed the most important thing, namely, that it's based on pure speculation, not observation. And the speculations are built upon the scientific fraud of falsely blaming smoking for diseases that are really caused by infection. It's just like the CDC's fraudulent SAMMEC, and like the SAMMEC, they pretend that non-smokers' costs don't exist at all.
And here's why! "Funding: This work was funded by National Cancer Institute grant CA-61021, in part through an interagency agreement with the Centers for Disease Control and Prevention Office on Smoking and Health. The CDC Office on Smoking and Health arranged a meeting with several experts on time series analysis of panel data nonstationary processes to advise the authors on methodological issues."
Then, after funding it, choosing the most militantly anti-smoker authors, and sending a team to direct tghe show, they hilariously claim that "Neither those experts nor the funding agencies played any role in the design of the final analysis, data collection and analysis, decision to publish, or preparation of the manuscript." How's that for a laugh!