First, an interesting post and cool map on industrial diversity in the US. Economic geography is still a first love for me.
Closer to home the International Growth Centre is doing enterprise maps for African countries.
The past week saw a torrent of Piketty reviews. I have not managed to read them all and I am thinking about a separate post with links to everything Pikkety. For now I can recommend Robert Solow's review in The New Republic (as @noahpinion tweeted, it is from the only guy with a working macro model, so you should read it).
Piketty resonated in SA with Hilary Joffe giving it a mention in Business Day and linking it to our inequality and redistribution issues.
In a related vein, Nancy Birdsall had a good post at the Centre of Global Development blog on why we should stop calling people living on between $2 and $10 per day "middle class". It also provides good perspective on the news stories of Africa's rising middle class.
Finally, a funny post on a "study" of the joke of how many historians it takes to change a light bulb and the response from the reviewers. I particularly like nr. 3:
Inestimably excellent and scarcely in need of revision. I have only two minor suggestions: instead of a joke, make it a haiku, and instead of light bulbs, make the subject daffodils.