by ilene - July 31st, 2010 9:05 pm
Another bad review for the Blinder and Zandi article – wrong and not only that, the economic models are a total waste of time. (For more about Eric Falkenstein and his experience with IP litigation, read our interview from last September, The Limits of Intellectual Property.) – Ilene
Courtesy of Eric Falkenstein at Falkenblog
Ezra Klein has a post promoting Blinder and Zandi’s model that shows massive good effects from more government deficit spending. As the model is a 1970′s vintage approach, an approach that attracted the nations best minds for decades, and was abandoned because they don’t work better than rather simple alternatives (eg, a vector autoregression of GDP, Fed Funds, and the Baa-Aaa spread).
I found this amusing because it highlights that journalists grab whatever science supports their ends. The details are not important, you have a professor with lots of publications, he has a complicated scientific argument, it makes you an objective, rational journalist. He even quotes Narayana Kocherlakota saying macro models work, not realizing the Kocherlakota was actually talking about a very different class of models than the one Blinder and Zandi use, and forgetting that of course a macroeconomist would say macro theory works.
At one point, Klein reaches for this argument for believing in their results:
It’s also worth noting that the private sector relies extensively on these models, and it would be odd for them to give Moody’s all that money if they thought there was no predictive value.
Presumably, he infers that as Zandi works for Moody’s, his results are somehow used by Moody’s. They are, but not in the way he thinks. I used to work at Moody’s. Moody’s does not make money off their macro economic opinions, they make money issuing ratings on debt, something they are paid well for. The macro view is alluded to in any analyst opinion, but even within Moody’s it’s not like the analysts think their economist knows better than others. CNBC and the outlets need someone to comment on macroeconomic topics, so having a full time economist discuss these things makes sense. Yet, remember, economists can’t predict business cycles, or explain why Mexico is poor, while the US is rich. Sure, people have theories, but there’s no consensus, highlighting that macroeconomists don’t understand the big issues on their plate.