Professor Robert MacCulloch: New Zealand's Productivity Puzzle -The Plot Thickens.

The author of the world's best selling textbook on economics, Greg Mankiw, is someone I admire for helping students, me included, understand the subject better. Many textbooks on the subject are confusing - his are not. Mankiw is calling for far greatly humility on behalf of those pretending to be economic experts due to the great limitations of our knowledge, particularly around what kind of government interventions work best.