This gala "aims to raise funds and seek partnerships medium and long term that could serve the cause of the Angola Red Cross", according to the country's official press agency, and Carey's appearance apparently helped raise $65,000.
Short term, that could help exporters.
In the medium term that should not be too difficult.
However, ironically, if you just look at daily price changes you may only see the distracting noise and miss these medium-term signals in longer term data, that could have some signalling value.
That medium term could certainly span the two five-year periods which are all that is allowed for President Xi's formal tenure of power – the Chinese Communist party having learned a lesson from the Soviet era of Leonid Brezhnev in a way that Fifa plainly has not.
Although profitability is still low with current economic costs, it is expected that in the medium term, oxy-combustion could be economically feasible in refining sector.
But there are good reasons to believe that over the medium term the dollar could drop a lot lower, especially against the euro.
"This likely reflects in part the greater sensitivity of UK household balances sheets in the medium term to floating interest rates, something that could be particularly relevant in our still heavily indebted post-crisis economy … We will learn more about the importance of these sensitivities as interest rates increase".
For the United States, for example, commitment to a credible program to reduce debt and deficits over the medium term could free up space for a short-term stance that is more attuned to the economic cycle.
The review shows public services are being provided in silos without regard to one another and found a need for more imaginative public spending, funding projects that could, over the medium term, deliver their own savings though not in the short term.
