Arthur Laf­fer isn’t a fan of Key­ne­sian stimulus

On August 5th, The Wall Street Jour­nal ran an edi­to­r­ial titled “Arthur Laf­fer: The Real ‘Stim­u­lus’ Record”. The author, Arthur Laf­fer, is an Amer­i­can econ­o­mist best known for the Laf­fer Curve. The edi­to­r­ial begins as follows:

Pol­icy mak­ers in Wash­ing­ton and other cap­i­tals around the world are debat­ing whether to imple­ment another round of stim­u­lus spend­ing to com­bat high unem­ploy­ment and sput­ter­ing growth rates. But before they leap, they should take a good hard look at how that worked the first time around.

It worked mis­er­ably, as indi­cated by the table nearby, which shows increases in gov­ern­ment spend­ing from 2007 to 2009 and sub­se­quent changes in GDP growth rates. Of the 34 Orga­ni­za­tion for Eco­nomic Coöper­a­tion and Devel­op­ment nations, those with the largest spend­ing spurts from 2007 to 2009 saw the least growth in GDP rates before and after the stim­u­lus.

Regard­ing this nearby table, mon­e­tary econ­o­mist David Glas­ner says the fol­low­ing in a cri­tique of the Laf­fer edi­to­r­ial:

So how did Laf­fer per­form his cal­cu­la­tion? He doesn’t say. All he does is cite the IMF as the source for his table. Thanks a lot, Art; that was really help­ful, but unfor­tu­nately, not help­ful enough to fig­ure out what you are talk­ing about.

Glas­ner is refer­ring to the fact that the table gives the source of the data sim­ply as “Inter­na­tional Mon­e­tary Fund”. It does seem that many dis­cus­sions in the polit­i­cal arena are ham­strung (per­haps pur­posely) by the fail­ure of the author to give a usable source, much less to explain his cal­cu­la­tions. I’ve there­fore taken the time to do what Laf­fer arguably should have done to begin with. I found this spread­sheet on the IMF site which appears to con­tain the num­bers used by Laf­fer. The fol­low­ing two tables show how these num­bers can be used to cal­cu­late Laffer’s figures:

Gross Domes­tic Prod­uct, Con­stant Prices
Per­cent change

Coun­try

2006

2007

2008

2009

2010

2011

(08+09)
minus
(06+07)

United States

2.658

1.913

–0.337

–3.486

3.030

1.735

–8.4

Japan

1.693

2.192

–1.042

–5.527

4.435

–0.748

–10.5

Ger­many

3.889

3.394

0.809

–5.078

3.562

3.056

–11.6

France

2.658

2.234

–0.196

–2.631

1.382

1.715

–7.7

United King­dom

2.607

3.466

–1.103

–4.373

2.092

0.655

–11.5

Italy

2.199

1.683

–1.156

–5.494

1.804

0.431

–10.5

Canada

2.823

2.200

0.689

–2.770

3.215

2.460

–7.1

Aus­tralia

2.682

4.676

2.500

1.373

2.544

2.035

–3.5

Spain

4.077

3.479

0.888

–3.740

–0.070

0.710

–10.4

Mex­ico

5.147

3.242

1.186

–6.275

5.543

3.967

–13.5

Korea

5.179

5.106

2.298

0.319

6.320

3.634

–7.7

Turkey

6.893

4.669

0.659

–4.826

9.006

8.460

–15.7

Nether­lands

3.394

3.921

1.804

–3.479

1.633

1.266

–9.0

Switzer­land

3.630

3.645

2.095

–1.878

2.714

1.851

–7.1

Swe­den

4.557

3.431

–0.774

–4.845

5.845

3.991

–13.6

Poland

6.227

6.785

5.127

1.606

3.944

4.350

–6.3

Nor­way

2.443

2.652

0.009

–1.661

0.654

1.688

–6.7

Bel­gium

2.702

2.900

0.957

–2.841

2.266

1.893

–7.5

Aus­tria

3.670

3.706

1.396

–3.810

2.315

3.107

–9.8

Den­mark

3.395

1.583

–0.784

–5.834

1.296

1.050

–11.6

Chile

5.825

5.207

3.034

–0.860

6.137

5.924

–8.9

Greece

4.614

3.032

–0.137

–3.258

–3.507

–6.860

–11.0

Fin­land

4.411

5.335

0.294

–8.354

3.732

2.855

–17.8

Israel

5.594

5.497

4.028

0.837

4.846

4.707

–6.2

Por­tu­gal

1.448

2.365

–0.008

–2.908

1.383

–1.466

–6.7

Ire­land

5.312

5.182

–2.972

–6.995

–0.430

0.705

–20.5

Czech Repub­lic

7.020

5.735

3.099

–4.695

2.739

1.655

–14.4

New Zealand

0.997

2.840

–0.074

–2.071

1.215

1.441

–6.0

Hun­gary

3.900

0.100

0.900

–6.800

1.270

1.695

–9.9

Slo­vak Republic

8.345

10.494

5.751

–4.932

4.183

3.349

–18.0

Lux­em­bourg

4.969

6.639

0.754

–5.300

2.678

1.004

–16.2

Slove­nia

5.850

6.870

3.589

–8.008

1.380

–0.175

–17.1

Esto­nia

10.097

7.492

–3.671

–14.258

2.264

7.636

–35.5

Ice­land

4.709

5.985

1.270

–6.807

–4.024

3.051

–16.2

Gen­eral Gov­ern­ment Total Expen­di­ture
Per­cent of GDP

Coun­try 2006 2007 2008 2009 2010 2011 2009
minus
2007
United States 35.852 36.672 39.196 43.981 42.142 41.397 7.3
Japan 34.489 33.312 35.730 39.982 39.002 40.675 6.7
Ger­many 45.559 43.506 44.046 48.104 47.869 45.625 4.6
France 52.934 52.595 53.329 56.725 56.668 56.321 4.1
United King­dom 40.613 40.325 43.066 47.267 46.325 45.725 6.9
Italy 48.464 47.611 48.610 51.889 50.495 49.953 4.3
Canada 39.268 39.158 39.535 44.056 43.815 42.664 4.9
Aus­tralia 34.635 34.244 34.487 37.579 36.773 36.598 3.3
Spain 38.342 39.192 41.300 46.065 45.439 43.586 6.9
Mex­ico 22.818 23.148 24.606 28.314 26.928 26.211 5.2
Korea 21.535 21.886 22.387 23.030 20.999 21.658 1.1
Turkey 32.793 33.325 33.837 37.717 35.443 34.186 4.4
Nether­lands 45.687 45.087 46.116 50.785 50.614 50.034 5.7
Switzer­land 35.663 34.634 32.612 34.398 34.040 34.736 –0.2
Swe­den 50.770 48.968 49.625 52.793 50.634 49.126 3.8
Poland 43.864 42.187 43.194 44.510 45.366 44.472 2.3
Nor­way 39.936 40.386 39.764 46.610 45.421 44.320 6.2
Bel­gium 48.603 48.320 49.900 53.828 52.942 53.450 5.5
Aus­tria 49.141 48.602 49.335 52.893 52.603 50.449 4.3
Den­mark 51.250 50.788 51.424 57.899 56.174 55.972 7.1
Chile 18.716 19.381 21.727 24.622 23.628 23.300 5.2
Greece 44.691 46.709 49.734 53.033 49.620 49.696 6.3
Fin­land 49.238 47.431 49.316 56.103 55.550 54.043 8.7
Israel 47.501 46.016 45.427 45.086 44.736 44.354 –0.9
Por­tu­gal 44.364 44.362 44.816 49.914 51.414 48.710 5.6
Ire­land 33.406 36.194 42.301 47.937 65.637 44.143 11.7
Czech Repub­lic 41.967 41.040 41.148 44.921 44.110 44.549 3.9
New Zealand 31.105 31.064 32.862 34.471 34.490 35.364 3.4
Hun­gary 52.164 50.641 49.205 51.380 49.453 48.441 0.7
Slo­vak Republic 36.521 34.210 35.049 41.704 41.100 38.375 7.5
Lux­em­bourg 38.576 36.267 37.103 43.042 42.482 41.635 6.8
Slove­nia 42.547 40.262 41.422 46.355 47.134 47.713 6.1
Esto­nia 34.573 34.853 41.037 47.654 44.713 43.123 12.8
Ice­land 41.641 42.268 44.639 49.672 47.923 46.321 7.4

The num­bers in the right­most col­umn of both tables exactly match the num­bers in Laffer’s table. Hence, the first table shows that the change in real GDP growth in Laffer’s table is equal to the annual GDP changes in 2008 and 2009 minus the annual GDP changes in 2006 and 2007. The sec­ond table shows that the change in gov­ern­ment spend­ing in Laffer’s table is equal to the gov­ern­ment spend­ing in 2009 minus the gov­ern­ment spend­ing in 2007, both as a per­cent of GDP.

Based on these num­bers, his edi­to­r­ial con­tin­ues as follows:

The four nations—Estonia, Ire­land, the Slo­vak Repub­lic and Finland—with the biggest stim­u­lus pro­grams had the steep­est declines in growth. The United States was no dif­fer­ent, with greater spend­ing (up 7.3%) fol­lowed by far lower growth rates (down 8.4%).

This state­ment is based on his cal­cu­la­tions for these four nations, shown in bold in the right­most col­umn of the above tables. Regard­ing Laffer’s cal­cu­la­tion of pub­lic spend­ing as a per­cent of GDP, econ­o­mist Lars Chris­tensen says the fol­low­ing in another cri­tique of the Laf­fer edi­to­r­ial:

One major prob­lem with Laffer’s num­bers is that he is using pub­lic spend­ing as share of GDP to ana­lyze the mag­ni­tude of change in fis­cal pol­icy. How­ever, for a given level of pub­lic spend­ing in euro (the cur­rency today in Esto­nia) a drop in nom­i­nal GDP will nat­u­rally lead to an increase in pub­lic spend­ing as share of GDP. This is obvi­ously not fis­cal stim­u­lus. Instead it makes more sense to look at the level of pub­lic spend­ing adjusted for infla­tion and this is exactly what I have done in the graph below. I also plot Eston­ian GDP growth in the graph. The data is [sic] yearly data and the source is IMF.

GDP Growth And Government Expenditures for Estonia: 2006-2011

GDP Growth And Gov­ern­ment Expen­di­tures for Esto­nia: 2006–2011

To the right is a sim­i­lar graph, also show­ing pub­lic spend­ing adjusted for infla­tion (blue line) and GDP growth (red line) for Esto­nia. It also shows pub­lic spend­ing as a per­cent­age of GDP (green line), the spend­ing val­ues used by Laffer.

The fol­low­ing table shows the val­ues for real pub­lic spend­ing as cal­cu­lated from the IMF data:

Gen­eral gov­ern­ment total expen­di­ture
Con­stant national cur­rency* (index 2006=100)

Coun­try

2006

2007

2008

2009

2010

2011

2009
minus
2007

United States

100.0

104.3

109.4

120.1

118.0

116.7

15.8

Japan

100.0

97.7

101.0

107.7

108.2

110.1

10.0

Ger­many

100.0

98.0

98.3

102.9

105.6

101.9

4.9

France

100.0

102.6

103.2

107.2

107.6

108.0

4.7

United King­dom

100.0

102.7

107.9

112.7

112.3

109.3

10.1

Italy

100.0

100.2

100.2

102.4

100.2

98.0

2.2

Canada

100.0

103.0

106.4

112.8

117.1

117.2

9.8

Aus­tralia

100.0

105.5

111.3

121.1

124.5

127.6

15.6

Spain

100.0

106.2

111.0

119.6

116.0

110.2

13.4

Mex­ico

100.0

106.4

115.8

123.8

124.2

128.2

17.4

Korea

100.0

106.3

109.4

113.6

110.9

115.9

7.3

Turkey

100.0

103.9

107.7

113.2

113.5

121.5

9.3

Nether­lands

100.0

102.8

107.0

112.2

114.0

112.9

9.3

Switzer­land

100.0

102.4

98.5

102.6

103.6

108.2

0.1

Swe­den

100.0

100.7

101.3

102.4

103.3

103.8

1.7

Poland

100.0

104.2

110.9

116.4

121.9

123.3

12.2

Nor­way

100.0

106.2

111.8

118.1

120.3

124.5

11.9

Bel­gium

100.0

102.8

104.8

111.2

111.3

113.0

8.4

Aus­tria

100.0

102.4

103.9

107.8

109.8

107.0

5.4

Den­mark

100.0

101.2

102.5

108.4

108.1

106.9

7.1

Chile

100.0

109.3

116.9

134.6

145.3

151.1

25.3

Greece

100.0

109.1

116.2

121.3

106.2

97.6

12.3

Fin­land

100.0

102.9

106.3

110.5

112.1

112.5

7.7

Israel

100.0

102.1

101.5

103.3

105.9

108.5

1.2

Por­tu­gal

100.0

102.8

102.7

113.1

117.7

107.1

10.4

Ire­land

100.0

112.2

120.6

124.0

167.5

111.7

11.7

Czech Repub­lic

100.0

103.9

102.9

108.0

105.6

105.5

4.2

New Zealand

100.0

104.9

110.0

114.0

117.2

121.1

9.1

Hun­gary

100.0

94.9

92.4

89.4

85.6

85.0

–5.6

Slo­vak Republic

100.0

102.7

110.1

122.0

125.0

117.8

19.3

Lux­em­bourg

100.0

101.6

105.7

115.8

120.4

118.9

14.3

Slove­nia

100.0

101.7

106.8

112.2

112.4

112.4

10.6

Esto­nia

100.0

113.5

122.8

121.2

114.2

117.0

7.7

Ice­land

100.0

108.2

115.2

115.4

108.4

107.1

7.2

A care­ful com­par­i­son of Christensen’s graph and the graph above shows that real pub­lic spend­ing (blue line) increases slightly faster on the for­mer, reach­ing about 122 in 2011 ver­sus 117 in the lat­ter. This is likely because the graph above is using “Infla­tion, aver­age con­sumer prices” as given in the IMF data, whereas Christensen’s data is likely using an alter­nate mea­sure of infla­tion. How­ever, the shapes of the line are basi­cally the same and Christensen’s fol­low­ing state­ment holds true for both:

So what hap­pened in 2009? Infla­tion adjusted pub­lic spend­ing dropped! This is what makes Esto­nia unique. The Eston­ian gov­ern­ment did NOT imple­ment Key­ne­sian poli­cies rather it did the oppo­site. It cut spend­ing. This is clear from the graph (the blue line). It is also clear from the graph that the Eston­ian gov­ern­ment intro­duced fur­ther aus­ter­ity mea­sures and cut pub­lic spend­ing fur­ther in 2010. This is of course what Laf­fer calls “fis­cal stim­u­lus”.

In fact, the four coun­tries with the most fis­cal stim­u­lus as mea­sured by the real increase in pub­lic spend­ing from 2007 to 2009 were Chile (25.3), the Slo­vak Repub­lic (19.3), Mex­ico (17.4), and the United States (15.8)! That includes only one of Laffer’s choice of four coun­tries with the low­est growth in GDP rates. The other three had much lower increases in pub­lic spend­ing of 11.7 (Ire­land) and 7.7 (Esto­nia and Finland).

In sum­mary, Laf­fer makes a num­ber of mis­takes in his edi­to­r­ial. The first is to com­pare growth in GDP rates with gov­ern­ment spend­ing as a per­cent of GDP. He is test­ing for a rela­tion­ship between two vari­ables but express­ing one of them (spend­ing) in terms of the other (GDP). That is, he is link­ing them by design! As an exam­ple of this link, sup­pose that spend­ing remains con­stant but GDP drops. By sim­ple arith­metic, this will cause spend­ing as a per­cent­age of GDP to rise and be inter­preted by Laf­fer as stim­u­lus. This seems like an incred­i­bly ele­men­tary mis­take for a pro­fes­sional econ­o­mist to be making.

The sec­ond mis­take is to select one span of data and look at only those data. Laf­fer chooses to look at GDP growth from 2006 to 2009 and gov­ern­ment spend­ing from 2007 to 2009. The tables at this link show cal­cu­la­tions for these same vari­ables going out to 2011 instead of 2009. As is evi­dent, this causes the results to be very dif­fer­ent. For exam­ple, the four nations with the high­est drop in GDP growth rates are Slove­nia (-23.1), the Slo­vak Repub­lic (-22.0), Greece (-21.1), and Ice­land (-19.7), when the span is increased from 2009 to 2011.

It’s often a good idea to look at all of the avail­able data in graph­i­cal for­mat (such as the one above) to get a look over all pos­si­ble time spans. Sim­i­lar graphs for Fin­land, Ire­land, and the Slo­vak Repub­lic can be found at the afore­men­tioned link.

Finally, Laf­fer makes the mis­take of not giv­ing a pre­cise source that allows his cal­cu­la­tions to be checked. This may be as much of a mis­take of The Wall Street Jour­nal as it is for Laf­fer. I believe that all pub­li­ca­tions should man­date that pre­cise sources be given and, if pos­si­ble, links be pro­vided to back­ground mate­r­ial that explains the author’s cal­cu­la­tions. Then, oth­ers will be able to check the author’s work, espe­cially in the case where the pub­li­ca­tions chooses not to do so or does a poor job of doing so.