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" It has often been claimed that there has been very little change in the average real income of American households over a period of decades. It is an undisputed fact that the average real income—that is, money income adjusted for inflation—of American households rose by only 6 percent over the entire period from 1969 to 1996. That might well be considered to qualify as stagnation. But it is an equally undisputed fact that the average real income per person in the United States rose by 51 percent over that very same period.3 How can both these statistics be true? Because the average number of individuals per household has been declining over the years. Half the households in the United States contained six or more people in 1900, as did 21 percent in 1950. But, by 1998, only ten percent of American households had that many people.4 The average number of persons per household not only varies over time, it also varies from one racial or ethnic group to another at a given time, and varies from one income bracket to another. As of 2007, for example, black household income was lower than Hispanic household income, even though black per capita income was higher than Hispanic per capita income, because black households average fewer people than Hispanic households. Similarly, Asian American household income was higher than white household income, even though white per capita income was higher than Asian American per capita income, because Asian American households average more people.5 Income comparisons using household statistics are far less reliable indicators of standards of living than are individual income data because households vary in size while an individual always means one person. Studies of what people actually consume—that is, their standard of living—show substantial increases over the years, even among the poor,6 which is more in keeping with a 51 percent increase in real per capita income than with a 6 percent increase in real household income. But household income statistics present golden opportunities for fallacies to flourish, and those opportunities have been seized by many in the media, in politics, and in academia. "
― Thomas Sowell , Economic Facts and Fallacies
