Does anyone have experience with or know anything about soundproofing the ceiling in an apartment to muffle noises from the unit upstairs?

The condo where I live was built a long time ago and all the units had wall-to-wall carpeting at the time. So there is no condo rule requiring a minimum amount of carpeting, and the board of directors is unwilling to change the bylaws to put such a rule into effect even though more and more residents are ripping out the carpets to expose the wood floors. The carpeting was removed from the unit above mine several years ago. The current owner moved out of state a few years ago and now rents it out.

The last person who lived upstairs had no area rugs, and she and her little dog made my life a living hell for nearly two years. She knew it was a problem for me and just didn't care. Now she has finally moved out and a new tenant has moved in, also without any rugs. The owner of the unit lives out of state and I have no contact information for them so I can't appeal to them for help. The condo management won't do anything other than "recommend" that people get rugs. So despite the fact that the condo rules say that I have the right to the peaceful use of my home, in reality I have no peace. I have to listen to the stomping and the cabinet slamming and the furniture being moved (EVERY DAY!! WHY DO THEY HAVE TO MOVE IT EVERY DAY!!) and the TV and the stereo and yes, even their conversations day in and day out because their decorating choices have priority over my right to peace and quiet. </rant>

So, I've looked online for information about soundproofing a ceiling. I'm finding some stuff out there -- something about extra drywall layers with a product called Green Glue, or decoupling clips with additional drywall -- but it seems that it can be expensive to do and it might not do much to mitigate the noise anyway. And I have no idea what kind of contractor would do this sort of work.

If anyone has any knowledge or experience in this area, I would really appreciate any input you can give.

Thanks!!