Author Archives: Menzie Chinn

“West Coast Workshop in International Finance 2017”

Taking place today, this is the fifth in the series, with topics this year on exchange rates and monetary policy, macroprudential policy, credit and business cycles (sponsored by UC Santa Cruz Economics, Santa Clara Economics, and Federal Reserve Bank of San Francisco, organization chaired by Helen Popper at SCU and Grace Weishi Gu at UCSC).

The website is here with links to papers, conference agenda here.

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Wisconsin Economic Activity Flat… And Projected to Remain Flat

That’s what the Philadelphia Fed’s leading indices, released today, indicate. In contrast, Minnesota is projected to power ahead.



Figure 1: Coincident index for Minnesota (blue), Wisconsin (red), and US (black), 1992M07=100, all on log scale; March 2018 values are implied by leading indices. Source: Philadelphia Fed, author’s calculations.

The implied level of economic activity in March 2018 will not exceed the level estimated for July 2017.

Governor Scott Walker has described the Wisconsin economy as “on fire”.

No Second Thoughts: Sustained 3.5% Growth Is Unlikely

Reader Arthurian writes in the wake of the 3% growth rate (SAAR) reported for 2017Q3:

Back in January Menzie Chinn said he thought growth in the 3.5-4% range was “unlikely”. I wonder if he is having second thoughts now.

I’m going to show two pictures deploying at most undergraduate statistics to show why I — like most numerically literate people — still think sustained 3.5% growth is unlikely.

First, consider what a naive statistical model — an ARIMA(1,1,1) estimated over the 1986-2017Q3 period — says, as compared to a 3.5% or 4% growth rate.



Figure 1: Reported GDP (blue), ARIMA(1,1,1) dynamic forecast (red) and 64% prediction interval (gray lines), implied path for 3.5% sustained growth (pink) and for 4% (light green), all billions Ch.2009$ SAAR. Source: BEA 2017Q3 advance release, author’s calculations.

Note that by estimating the regression starting in 1986 when the trend growth rate was relatively high, I am slanting the results toward projecting faster growth. Even then, the 3.5% growth rate is at the uppermost edge of the 64% prediction interval. 4% growth is even more laughable.

Second, now consider what sustained 3.5% growth implies for the output gap. For that calculation, one needs an estimate of potential GDP; for want of a better measure, I use CBO’s estimate. This is shown in Figure 2.



Figure 2: Reported GDP (blue), implied path for 3.5% sustained growth (pink) and potential GDP (gray), all billions Ch.2009$ SAAR. Source: BEA 2017Q3 advance release, CBO (June 2017), author’s calculations.

Assuming sustained 3.5% growth, the output gap by end-2019 would be 4.2%, 5.9% by end-2020. Of course, CBO could be terribly misguided about the trajectory of potential GDP. But in order to believe potential GDP can grow at 3.5%, I really do believe that it can only be done by adherence to Spaceology. Refer to Figure 3, reproduced from my January post, and look at what the orange bar — labor productivity — has to do in order to hit 3.5% potential growth.



Figure 3: Contributions to annual growth in potential GDP growth, from labor force augmentation (blue bar), and from labor productivity growth (orange bar). DJT’s target of 3.5-4% shown as pink range. Source: CBO, Budget and Economic Outlook, January 24, 2017, Table 2-3; and Trump-Pence website