What monetary policy can do is to maintain stability without unnecessary fluctuations in output and employment. Overall employment is also influenced by wage formation. If wages increase at an unsustainable pace, employment will decline and unemployment will gradually increase. Monetary policy cannot prevent an increase in unemployment that is due to a wage-driven cost shock. When there is confidence that monetary policy will contribute to low and stable inflation over time, it can contribute in the short term - under certain conditions - to smoothing fluctuations in output and demand. In the short term, there is a trade-off between the objectives of inflation stability on the one hand, and output and employment stability on the other. An aggressive monetary policy will rapidly bring inflation to the target. This will cause wide fluctuations in the real economy. The interest rate can also be changed more gradually, which will have less impact on the real economy but cause more pronounced fluctuations in inflation. By influencing inflation over time, we can ensure that an overly aggressive monetary policy does not in itself cause unnecessary disturbances to the economy. The impact of monetary policy occurs with considerable and variable lags. Our analyses indicate that a substantial share of the effects of an interest rate change will occur within two years. Two years is thus a reasonable time horizon for achieving the inflation target.
International inflationary impulses are generated via prices for imported consumer and intermediate goods. These inflationary impulses will partly be influenced by developments in international commodity and consumer prices and by the exchange rate. Interest rates influence inflation through their impact on domestic demand and on the market for NOK. When interest rates rise, it is more profitable to save and more costly to borrow. This dampens consumption and investment and hence aggregate demand. Lower demand in turn curbs the rise in prices and wages. Higher interest rates make it more attractive to take krone positions and borrow in foreign currency. As a result, higher interest rates normally lead to an appreciation of the krone. This reduces prices for imported goods. In addition, a strong krone reduces activity and profitability in the internationally exposed sector. It is important to be aware of the relationships between employment, output and inflation. If there is a shortage of labour and other economic resources, a tight monetary policy stance will reduce inflation by affecting aggregate demand. Conversely, when unemployment is high, low interest rates stimulate demand, which will contribute to stable wages and prices. A monetary policy stance that is aimed at stabilising inflation will thus also contribute to stabilising aggregate output and employment. In the long term, monetary policy determines the average level of inflation. Output is determined by the supply of labour, capital and technology and by productivity growth. Attempts to increase output beyond the total capacity of the economy will lead to inflation in the long run.