Are half a million hardworking Poles to blame for the UK real estate bubble?

The answer to the question of course is no, but let me tell the story anyway. It is a story about positive supply shocks, inflation targeting, relative inflation and bubbles.

In 2004 Poland joined the EU. That gave Poles the possibility to enter the UK labour market (and other EU labour markets). It is estimated that as much as half a million poles have come to work in the UK since 2004. The graph below shows the numbers of Poles employed in the UK economy (I stole the graph from Wikipedia)

Polish-born_people_in_employment_in_the_UK_2003-2010_-_chart_2369a_at_statistics_gov_uk

 

 

 

 

 

 

 

Effectively that has been a large positive supply shock to the UK economy. In a simple AS/AD model we can illustrate that as in the graph below.

Positive supply shock

The inflow of Polish workers pushes the AS curve to the right (from AS to AS’). As a result output increases from Y to Y’ and the price level drops to P’ from P.

Imagine that we to begin with is exactly at the Bank of England’s inflation target of 2%.

In this scenario a positive supply – half a million Polish workers – will push inflation below 2%.

As a strict inflation targeting central bank the BoE in response will ease monetary policy to push inflation back to the 2% inflation target.

We can illustrate that in an AS/AD graph as a shift in the AD curve to the right (for simplicity we here assume that the BoE targets the price level rather than inflation).

The BoE’s easing will keep that price level at P, but increase the output to Y” as the AD curve shifts to AD’. Note that that assumes that the long-run AS curve also have shifted – I have not illustrated that in the graphs.

Positive supply shock and demand shock

At this point the Austrian economist will wake up – because the BoE given it’s monetary easing in response to the positive supply shock is creating relative inflation.

Inflation targeting is distorting relative prices

If we just look at this in terms of the aggregate price level we miss an important point and that is what is happening to relative prices.

Hence, the Polish workers are mostly employed in service jobs. As a result the positive supply shock is the largest in the service sector. However, as the service sector prices fall the BoE will push up prices in all other sectors to ensure that the price level (or rather inflation) is unchanged. This for example causes property prices to increase.

This is what Austrian economists call relative inflation, but it also illustrates a key Market Monetarist critique of inflation targeting. Hence, inflation targeting will distort relative prices and in that sense inflation targeting is not a “neutral” monetary policy.

On the other hand had the BoE been targeting the nominal GDP level then it would have allowed the positive shock to lead to a permanent drop in prices (or lower inflation), while at the same time kept NGDP on track. Therefore, we can describe NGDP level targeting as a “neutral” monetary policy as it will not lead to a distortion of relative prices.

This is one of the key reasons why I again and again have described NGDP level targeting as the true free market alternative – as NGDP targeting is not distorting relative prices contrary to inflation targeting,which distorts relative prices and therefore also distorts the allocation of labour and capital. This is basically an Austrian style (unsustainable) boom that sooner or later leads to a bust.

So is this really the story about UK property prices?

It is important to stress that I don’t necessarily think that this is what happened in the UK property market. First, of all UK property prices seemed to have taken off a couple of years earlier than 2004 and I have really not studied the data close enough to claim that this is the real story. However, that is not really my point. Instead I am using this (quasi-hypothetical) example to illustrate that central bankers are much more likely to creating bubbles if they target inflation rather than the NGDP level and it is certainly the case that had the BoE had an NGDP level targeting (around for example a 5% trend path) then monetary policy would have been tighter during the “boom years” than was actually the case and hence the property market boom would likely have been much less extreme.

But again if anybody is to blame it is not the half million hardworking Poles in Britain, but rather the Bank of England’s overly easing monetary policy in the pre-crisis years.

PS I am a bit sloppy with the difference between changes in prices (inflation) and the price level above. Furthermore, I am not clear about whether we are talking about permanent or temporary supply shocks. That, however, do not change the conclusions and after all this is a blog post and not an academic article.

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