Laffer’s Mistake Regarding Stimulus
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) |
| 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
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 |
| 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.
Related articles
- Arthur Laffer’s Anti-Stimulus Curve Ball is a Foul (business.time.com)
- Arthur Laffer: The Real ‘Stimulus’ Record — WSJ.com (cg68doc.newsvine.com)
- Arthur Laffer: Wall Street Journal Op-Ed Proves He Still Has Much to Learn (thenewamerican.com)






Reed,
On thinking this over, it seems to me that the word “mistake” is not appropriate here. A clear and obvious attempt by using cherry-picked data and a carefully honed “metric” to reach a conclusion that was desired.
I’m sure a lot of people who already believed the conclusion will find his “analysis” convincing.