Some analysts have suggested that the official poverty figures overstate the real extent of poverty because they measure only cash income and exclude certain government assistance programs such as Food Stamps, health care, and public housing. Others point out, however, that these programs rarely cover all of a family's food or health care needs and that there is a shortage of public housing. Some argue that even families whose incomes are above the official poverty level sometimes go hungry, skimping on food to pay for such things as housing, medical care, and clothing. Still others point out that people at the poverty level sometimes receive cash income from casual work and in the "underground" sector of the economy, which is never recorded in official statistics. In any event, it is clear that the American economic system does not apportion its rewards equally. In 1997, the wealthiest one-fifth of American families accounted for 47.2 percent of the nation's income, according to the Economic Policy Institute, a Washington-based research organization. In contrast, the poorest one-fifth earned just 4.2 percent of the nation's income, and the poorest 40 percent accounted for only 14 percent of income. Despite the generally prosperous American economy as a whole, concerns about inequality continued during the 1980s and 1990s. Increasing global competition threatened workers in many traditional manufacturing industries, and their wages stagnated. At the same time, the federal government edged away from tax policies that sought to favor lower-income families at the expense of wealthier ones, and it also cut spending on a number of domestic social programs intended to help the disadvantaged. Meanwhile, wealthier families reaped most of the gains from the booming stock market. 16