Inflation’s convergence in the run up to Stage Three has been checked, however, and recently the spread has even become wider. This is hardly surprising in itself, neither is it a major problem. The process known as catching up means that countries with a below-average level of prosperity initially will benefit from technological and organisational advances elsewhere and accordingly grow faster than the rich countries, which in turn can lead to higher inflation. Furthermore, countries with strong export-led growth can experience upward wage pressure in other sectors, too, leading ultimately to higher inflation. So there are reasons why growth rates as well as rates of inflation can diverge in a monetary union without this being unnatural or a problem for either the countries in question or the union as a whole. It seems fairly evident that elements of this kind of “more innocuous” inflation are around at present. The clearest example is Ireland, with catch-up effects and a number of years of exceptional productivity growth. But even there the picture is not unambiguous and when inflation now increases in a number of member states, questions arise about the formation of stabilisation policy. This is definitely not a problem that can be tackled with measures of monetary policy. The function of monetary policy is to maintain price stability in the union as a whole, a mandate that seems to be generally supported and understood. Neither is there any cause to criticise how monetary policy has been conducted in practice.
However, even if there are rewards to be earned from coordination, it will probably be some time before the EU member states are sufficiently mature to take further big leaps. Ultimately it now boils down to the sensitive issue of how much power should be placed in European rather than national hands. But there is no doubting the strength of the tension between the single monetary policy and the remainder of economic policy that is still handled at national level. In this tension lies the seeds of continued economic policy coordination in Europe. 5  BIS Review 102/2000