Have a little time on my hands at the moment, have just reviewed my 2012 to 2013 end of year accounts figures. European/UK shows a net cost deflation of 0.07%, the USA (NY/NY) bit a net cost deflation of 0.16% & the Dubai bit a net cost inflation of 16.744%.
On the revenue side, European/UK an net increase of 2.06%, USA a net increase of 4.72% and Dubai a a net increase of 27.29%. The mentioned figures reflect the sum of earned income and income from capital investment.
The Dubai figure is largely capital return with net increase in earned income a mere 1.724%.
Costs are getting a little on the wild side in Dubai, let's see if the law of diminishing returns kicks in.