Ben Moll Profile picture
Mar 7 13 tweets 8 min read
We put together a team of macro-, micro- and energy economists to think about the question: what would be the effects on the German economy of a stop of energy imports from Russia?

In short: moderate, especially in combination with the right policy response.

1/
Worth emphasizing: the -3% GNE loss number is an extremely conservative upper bound.

Using the more reasonable @DBaqaee-Farhi model, we obtain numbers that are an order of magnitude lower.

But this is a hard counterfactual to predict so we wanted to be conservative.

3/
Just realized the link above was to the German version. Here’s the English one econtribute.de/RePEc/ajk/ajkp…
Replication materials for our results are here benjaminmoll.com/RussianGas_Rep…
We've gotten a lot of questions whether and to what extent our model features production chains and cascades.

The most recent appendix discusses this more clearly:

benjaminmoll.com/RussianGas_App… Image
We review the many other high-quality studies assessing effects of an import stop on German economy

benjaminmoll.com/RussianGas_Lit…

Summary:
- no single study finds deviation of yearly GDP from baseline larger than 5.3%
- no single study finds recession with GDP drop larger than 2.5% Image
Our review builds heavily on the careful and highly recommended survey by @SVR_Wirtschaft Image
Of course, any model-based quantitative assessment is necessarily subject to a large degree of uncertainty, both with respect to parameter values and functional form assumptions and in the form of uncertainty about model choice and assumptions (“model uncertainty”). ImageImage
We nevertheless think that the combined body of work suggests that:

- a recession with year-to-year GDP drop of >5% seems highly unlikely

- a recession with GDP drop of 10 or 15% or even Great Depression-type scenario is completely implausible Image
As we said many times, these numbers -- GDP deductions of 3% or 5%, or a recession with a 2% GDP drop -- are substantial.

But they do not amount to an economic catastrophe.
In case this wasn't clear and to put it a bit more bluntly: the "completely implausible" scenarios include

- "the loss of millions of jobs" (@Bundeskanzler Scholz)

- "mass unemployment and poverty" (Habeck)

spiegel.de/politik/olaf-s…

theguardian.com/world/2022/mar… ImageImage
Regarding lost jobs, the largest number is ~500,000 (1% increase of unemployment rate from 5% to 6%) predicted by GD gemeinschaftsdiagnose.de/wp-content/upl…

Of course a large number but not "millions." And it could probably be substantially reduced with standard policy measures (Kurzarbeit etc) ImageImage

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More from @ben_moll

Jun 25
Putin cutting gas to 🇩🇪 and other 🇪🇺 countries raises many important questions:

1. How to best dampen economic costs?

2. Given measures to date, will costs be smaller or larger than estimates from March/April?

3. What does this mean for Russia and the war?

A summary thread: Image
The thread will focus on the German case with (warning!) lots of references in German.

But many of the points should also carry over to other countries, say Italy.

I will also draw heavily on what many smart colleagues have written elsewhere.
Importantly, there remains a large amount of uncertainty, in particular with regard to what Russia will do.

Russia completely shutting down gas deliveries at any moment is a very distinct possibility.

ft.com/content/09ac0a…
Read 34 tweets
Jun 5
Excellent thread with intuitive explanations why people claiming energy sanctions won't affect Putin's ability to wage war in Ukraine either haven't thought things through or are arguing in bad faith.

1/
An example by @M_C_Klein: "Russia has lost access to many imports" and therefore "the oil boycott will hurt ordinary Europeans at least as much as it impairs Putin’s war effort. It should be understood mainly as a moral gesture rooted in self-denial"



2/
An important point before proceeding: as @lugaricano writes, this is not an academic seminar where we discuss abstract points.

"Words can cost lives here."



3/
Read 15 tweets
May 9
.@tom_krebs on a gas import stop: 1.6%*5 = 8%.

Only the 1.6% is @tom_krebs own number. The factor of 5 is from a totally different study from a totally different context (Fukushima).

Even the authors of the Fukushima study themselves say they would not make this calculation.
Where does this "production multiplier" of 5 come from?

From an important paper on supply chain disruptions after Fukushima by Vasco Carvalho, Makoto Nirei, Yukiko Saito & Alireza Tahbaz-Salehi @QJEHarvard which indeed finds substantial amplification.

academic.oup.com/qje/article/13…
We asked Alireza Tahbaz-Salehi & Vasco Carvalho what they thought of the @tom_krebs_ calculation. Here is what they said:

"We ourselves would not use that Japan- and earthquake-specific number as a starting point for a quantitative assessment of energy disruptions in Europe."
Read 14 tweets
May 8
Selbst Teile der deutschen Industrie-Lobby denken dass ein #Ölembargo in 6 bis 8 Monaten zu langsam ist!

"Ölembargo ist richtig, muss aber schneller kommen" sagt der Maschinenbau-Verband @VDMAonline

vdma.org/viewer/-/v2art…
"[Ein Ölembargo] ist überfällig und nötig. [...] Die geplante schrittweise Einführung bis zum Jahresende ist aber nicht ambitioniert genug. Wenn man die Einnahmequellen für Putins Kriegsmaschinerie effektiv treffen will, muss das Embargo wesentlich schneller greifen."
"Obwohl das Ölembargo auch den Maschinen- und Anlagenbau indirekt weiter belasten wird, sieht der VDMA angesichts des aggressiven und menschenverachtenden Verhaltens Russlands in der Ukraine keine Alternative zu einer weiteren Verschärfung der Sanktionen."
Read 5 tweets
Apr 25
When people run out of arguments, they start saying things that aren't quite true.

Here is the Head of the Scholz Chancellery @W_Schmidt_ talking about our work on an import stop of Russian energy and this is exactly what happens

around min 26:00

1/
The @ZEITstiftung panel, also featuring @fromTGA @HalynaYanchenko @AbaziHaki & moderated by @AslanTV, is well worth watching

@fromTGA mentions our paper "It would cost a lot, maybe 2-3% of GDP, but it’s doable"

@W_Schmidt_ then says a few things we would like to react to.

2/
Some of these statements are either misleading or plainly wrong.

More importantly though @W_Schmidt_ simply dismisses a whole body of work that concludes: economic costs of an embargo would be substantial (eg jobs would be lost) but not catastrophic.



3/
Read 14 tweets
Apr 5
I finally got around to reading this.

There are some fair points, in particular some we explicitly acknowledge (missing aggregate demand amplification etc)

But I will react to the main criticism because it is quite far fetched: that there is no chemical industry in our model. Image
First, in its literal interpretation, the sentence "there is no German chemical industry" is demonstrably false.

Anyone can see for themselves by simply reading our paper and I'm sure @tom_krebs_ was aware of this.

1/ Image
Now if you read @tom_krebs_ article in more detail, that's not actually what he means.

Instead his criticism is that we use a common elasticity of substitution for household consumption ("turn down heating") and different sectors in industry ("cracking furnaces").

2/ Image
Read 15 tweets

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