Are you cherry-picking studies to support your beliefs? Because you should click through to the letters to the editor in response to the article: http://www.nejm.org/doi/full/10.1056/NEJM199802123380713

The responses raise legitimate concerns about the article's analysis, and they also support my assertion (which continues to be the mainstream view of the costs of smoking-related health-care). For example, the analysis you cited ignores secondhand smoke health costs entirely and ignores a number of conditions associated with smoking. In the author's reply to the criticism, they paper over these concerns in an inadequate way.