Facebook buys Instagram. DOJ sues Apple. Yglesias on manufacturing policy. Matthew Kahn does some consumption math.
Forget the Factories - Matt Yglesias (In response to this and this.) Great discussion all around.
Not-proven: The DOJ suit Against Apple for eBook pricing - Richard Epstein. Good points on basic monopoly practices.
Some Gasoline Consumption Algebra - Matthew Kahn
Instagram goes for $1 billion - The Guardian (My comments here.)