It's long been an article of faith with me that the seemingly perpetual growth in the number of state-sponsored gambling outlets is poor public policy. Common sense says that the amount of money people will spend on these games has a ceiling - one that we've almost certainly reached by now.

If that's correct, then further expansion of legalized gambling is a fool's errand, as the money generated by it won't increase meaningfully. Once gambling has reached a saturation point in a region, revenues will just get shifted from gaming company to gaming company and state to state and local government to local government.

But like all articles of faith, I had no proof for my hypothesis. So I decided to test it, and the Quad Cities market seemed like an excellent laboratory.

What is now the Isle of Capri casino in Bettendorf opened in April 1995 - making us a three-casino community. (I'll refer to the casinos by their present names throughout this article.) We now have almost two decades of gaming information with the three-casino marketplace, and a handful of variables allow us to see what happened here when this happened there: the December 2008 move of Jumer's from downtown Rock Island to Interstate 280; the recession that hit in 2007-8; new casino competitors in eastern Iowa in 2006 and 2007; and the 2012 introduction of video-gambling machines in Illinois outside of casinos.

What I found didn't exactly support my hypothesis of a Quad Cities gambling pie with a fixed size. Rather, the data suggest there are ways to add new customers to the local gambling market - but that the pie has nonetheless been shrinking for a decade.

a scene from Ballet Quad Cities' 2008 production of The NutcrackerOn December 12 and 13, area audiences will have the opportunity to attend two separate productions of composer Pyotr Ilyich Tchaikovsky's The Nutcracker: one performed by the professional dancers of Ballet Quad Cities (plus a few local performers), one performed by the student performers of RiverPointBallet (plus a professional dancer). And Ballet Quad Cities' Executive Director Joedy Cook is up-front about a large part of the holiday favorite's appeal: "For all ballet companies, Nutcracker is what really helps pay their bills. Nutcracker is the one ballet that you can count on to get an audience."

Yet as Cook well knows, that's not the reason that audiences themselves flock to The Nutcracker year after year. "It's truly the most recognizable music in the world," she says, "and that's because it's magical. And The Nutcracker itself is magical. It's magic, it's dreamy ... it's 'Calgon! Take me away!'"