Smoke-free law did affect revenue from gaming in Delaware

A paper recently published in the journal Tobacco Control purports to show that the implementation of a smoking prohibition in Delaware had no statistically significant effect on the revenues of three gaming facilities in that state. After correcting for evident errors in that analysis, I find that the smoke-free law did affect revenues from gaming in Delaware. Total gaming revenues are estimated to have declined by at least $6 million per month after the implementation of Delaware*s Clean Indoor Air Law. This represents a loss of over 12% relative to average monthly revenues in the year preceding the smoking ban.