Reducing inequality and giving labor a larger share of national income to increase consumer demand, allowing more immigration, and targeting a higher inflation rate are unconventional measures necessary to increase growth as monetary policy reaches the limit of its effectiveness at near zero interest rates, says Galston. Growth in U.S. since 2000 is about 1.8% annually on average compared to 3.6% in the postwar years to 2000. Growth since 2000 rarely reaches 3% a year. Robert Gordon has pointed out the factors of a slowdown in mass education, rapidly aging population, rising inequality and increasing public debt as reasons for slower growth in the future. Glaeser and Summers also support this view. There is also the possibility that the secular stagnation idea suggested by Hansen in 1938 after years of low growth, comes at a point when growth is about to pick up pace as happened during and after the war.