You don't need a study. Research how alcohol is metabolized. It's a toxin. The body spends tons of energy trying to eliminate it. As soon as it hits your system, the metabolic process to get rid of it kicks in and takes precedence over everything. It's very, very difficult to turn alcohol directly into body fat. Almost impossible actually, considering the energy requirements and physiological reactions that happen. Where you get fat on alcohol is when the secondary effects kick in.
I drink alcohol with a bunch of sugary mixes.
I drink and I don't sleep well.
I drink and I eat too much.
I drink and I'm less active.
I drink, make bad decisions and become stressed.
This is an older Martin Berkhan article, but it basically goes through ways to hack your body to become and stay absolutely shredded while going off the rails on the weekends. It provides a whole day of what to eat, what to do and what to avoid when you know you're going to let it go.
http://www.leangains.com/2010/07/truth-about-alcohol-fat-loss-and-muscle.html