Hello, I must be going

Next Sunday I will return to Brazil. But before taking the plane, I am going to the European Regional Science Association Conference in Paris. The abstracts and some full papers are available , including the one that Martin Brauch and I have written.
I am quite busy packing and writing the final report, but I will try to post daily. Meanwhile I leave my readers with Groucho Marx:

Hello, I must be going.
I cannot stay,
I came to say
I must be going.
I'm glad I came
but just the same
I must be going.