Jumat, 20 April 2018
Q is better than you think
This lovely graph comes from "Learning and the Improving Relationship Between Investment and q" by Daniel Andrei, William Mann, and Nathalie Moyen. The careful investment and q measurement make it much better than similar figures I've made for example Figure 4 here. Their paper explores the puzzle, just why did q theory work worse before 1995?
The graph also bears on the "monopoly" debate. Corporations are making huge profits, stocks are high, yet we don't see investment, the story goes -- marginal q must be much less than average q, indicating some sort of fixed factor or rent. Not in the graph.
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