There are too many from Vox EU today to post them all, so here are the links and summaries (and there's one more following this post). I'm tempted to post a couple of them just to read the comments they would generate:
Obesity’s on the rise – let’s have the courage to tax junk food! Pierre Dubois: Obesity is a becoming a major health problem in Europe and it's driven to some extent by rising junk food consumption. Junk food has negative externalities and recent research finds that its demand is fairly elastic. If it is so natural to tax cigarettes, why not tax junk food as well?
Gender discrimination lowers output per capita (a lot) Tiago V. de V. Cavalcanti, José A. Tavares: Gender discrimination is economically inefficient since it prevents equalisation of marginal products. Recent simulations based on calibrated macro models indicate that the economic loss is large. In one thought experiment, the research suggests that a very large fraction of the income differences between many nations and the US is due to gender inequality.
Financial crisis: why it may last Angel Ubide: The subprime crisis was first characterised as a liquidity crisis, but a month and billions of dollars of liquidity injections later, the situation has not improved. Perhaps it was not about liquidity, after all.
Sovereign wealth funds Richard Portes: Sovereign wealth funds are politically so hot that they competed with the summer's financial crisis for media attention - both politicians and the press have expressed concern about their activities. Not many corporates have complained, however, and some like Barclays and Blackstone have welcomed sovereign wealth fund investment. How are sovereign wealth funds apt to respond?
Free trade agreements and trade liberalisation Dean A. DeRosa, Gary Clyde Hufbauer: Global tariff-cutting over the past decade was dominated by preferential trade agreements. These deals stimulate trade among members, but by creating tariff discrimination, they also divert trade from non-members. Recent research suggests that the majority of the world’s preferential deals created more trade than they diverted and so constitute a constructive force in the world economy.