A study published in 2011 by the OECD noted that: Question 1 options: the gap between the poorest and richest segments of society in some OECD countries had widened. the real household income of the unskilled workers in the U.S. increased more in comparison to that of the skilled workers. falling unemployment rates brought gains to low-wage workers and fairly broad-based wage growth. in almost all countries real income levels declined over the 20-year period studied