 To support this even further it is believed that a country aggregate level of SWB can account for more variance in government vote share than standard macroeconomic variables, such as income and employment.According to Bond and Lang (2018) the results are skewed due to the fact that the respondents have to "round" their true happiness to the scale of, e.g., 3 or 7 alternatives (e.g., very happy, pretty happy, not too happy).This "rounding error" may cause a less happy group seem more happy, in the average.