Similarly, the current unemployment rate of 9 percent is well above most estimates of the nonaccelerating inflation rate of unemployment (NAIRU) – the lowest rate of unemployment consistent with sustained price stability. In the pre-crisis period, the NAIRU was likely in the region of 4.5 percent to 5 percent. There are several reasons why the NAIRU may now be higher. First, extended unemployment compensation benefits create incentives for prospective workers to keep looking for better jobs rather than accept less attractive positions. Empirical work on this subject suggests that the NAIRU might currently be roughly 1 percentage point higher because of this factor. However, this effect will only persist for as long as the extended benefits are in place. Second, the rise in unemployment has been associated with an increase in the degree of mismatch between unemployed workers’ job skills and available job vacancies. Some cite the upward shift in the Beveridge curve, which illustrates the relationship between unemployment and job vacancies (Chart 22), as evidence of this effect. Third, the longer that people are unemployed, the more their skills tend to atrophy, which makes it harder for them to become employed in the future. For unemployed workers, the median duration of unemployment has climbed and a growing proportion of the unemployed has been jobless for long periods (Chart 23).
In the early phase a significant part of this income came from liquidity programs. More recently, the main contributor has been net interest on the expanded SOMA portfolio. At this juncture, SOMA continues to generate abnormally high net income. As policy eventually normalizes and the cost of financing assets via interest on excess reserves goes up, the net interest margin on the SOMA assets will return to more normal levels. However, the net interest margin is unlikely to turn negative because roughly $ billion of assets are – and have been for many years – funded by notes and coins in circulation, on which the Fed does not pay interest.