Income Inequality And Iq

Using data from the National longitudinal Study of Youth, argues that intelligence quotient has an important effect on income independent of family background.

Lynn and Vanhanen test the hypothesis on the causal relationship between the average national intelligence (IQ) and the gap between rich and poor countries by empirical evidence. Based on an extensive survey of national IQ tests, the results of their work challenge the previous theories of economic development and provide a new basis to evaluate the prospects of economic development throughout the world. They begin by reviewing and evaluating some major previous theories. The concept of intelligence is then described and intelligence quotient (IQ) introduced. Next they show that intelligence is a significant determinant of earnings within nations, and they connect intelligence with various economic and social phenomena. The sociology of intelligence at the level of sub-populations in nations is examined, and the independent (national IQ) and dependent (various measures of per capita income and economic growth rates) variables are defined and described. They then provide empirical analyses starting from the 81 countries for which direct evidence of national IQs is available; the analysis is then extended to the world group of 185 countries. The hypothesis is tested by the methods of correlation and regression analyses. The results of statistical analyses support the hypothesis strongly. The results of the analyses and various means to reduce the gap between rich and poor countries are discussed. A provocative analysis that all scholars, students, and researchers involved with economic development need to confront.

A scientific response to the best-selling The Bell Curve which set off a hailstorm of controversy upon its publication in 1994. Much of the public reaction to the book was polemic and failed to analyse the details of the science and validity of the statistical arguments underlying the books conclusion. Here, at last, social scientists and statisticians reply to The Bell Curve and its conclusions about IQ, genetics and social outcomes.

Over the last few decades, economists and psychologists have quietly documented the many ways in which a person's IQ matters. But, research suggests that a nation's IQ matters so much more. As Garett Jones argues in Hive Mind, modest differences in national IQ can explain most cross-country inequalities. Whereas IQ scores do a moderately good job of predicting individual wages, information processing power, and brain size, a country's average score is a much stronger bellwether of its overall prosperity. Drawing on an expansive array of research from psychology, economics, management, and political science, Jones argues that intelligence and cognitive skill are significantly more important on a national level than on an individual one because they have "positive spillovers." On average, people who do better on standardized tests are more patient, more cooperative, and have better memories. As a result, these qualities—and others necessary to take on the complexity of a modern economy—become more prevalent in a society as national test scores rise. What's more, when we are surrounded by slightly more patient, informed, and cooperative neighbors we take on these qualities a bit more ourselves. In other words, the worker bees in every nation create a "hive mind" with a power all its own. Once the hive is established, each individual has only a tiny impact on his or her own life. Jones makes the case that, through better nutrition and schooling, we can raise IQ, thereby fostering higher savings rates, more productive teams, and more effective bureaucracies. After demonstrating how test scores that matter little for individuals can mean a world of difference for nations, the book leaves readers with policy-oriented conclusions and hopeful speculation: Whether we lift up the bottom through changing the nature of work, institutional improvements, or freer immigration, it is possible that this period of massive global inequality will be a short season by the standards of human history if we raise our global IQ.

(This book is a printed edition of the Special Issue "If Intelligence Is Truly Important to Real-World Adaptation, and IQs Have Risen 30+ Points in the Past Century (Flynn Effect), then Why Are There So Many Unresolved and Dramatic Problems in the World, and What Can Be Done About It?'' that was published in J. Intell.)

Most Americans strongly favor equality of opportunity if not outcome, but many are weary of poverty's seeming immunity to public policy. This helps to explain the recent attention paid to cultural and genetic explanations of persistent poverty, including claims that economic inequality is a function of intellectual ability, as well as more subtle depictions of the United States as a meritocracy where barriers to achievement are personal--either voluntary or inherited--rather than systemic. This volume of original essays by luminaries in the economic, social, and biological sciences, however, confirms mounting evidence that the connection between intelligence and inequality is surprisingly weak and demonstrates that targeted educational and economic reforms can reduce the income gap and improve the country's aggregate productivity and economic well-being. It also offers a novel agenda of equal access to valuable associations. Amartya Sen, John Roemer, Robert M. Hauser, Glenn Loury, Orley Ashenfelter, and others sift and analyze the latest arguments and quantitative findings on equality in order to explain how merit is and should be defined, how economic rewards are distributed, and how patterns of economic success persist across generations. Moving well beyond exploration, they draw specific conclusions that are bold yet empirically grounded, finding that schooling improves occupational success in ways unrelated to cognitive ability, that IQ is not a strong independent predictor of economic success, and that people's associations--their neighborhoods, working groups, and other social ties--significantly explain many of the poverty traps we observe. The optimistic message of this beautifully edited book is that important violations of equality of opportunity do exist but can be attenuated by policies that will serve the general economy. Policy makers will read with interest concrete suggestions for crafting economically beneficial anti-discrimination measures, enhancing educational and associational opportunity, and centering economic reforms in community-based institutions. Here is an example of some of our most brilliant social thinkers using the most advanced techniques that their disciplines have to offer to tackle an issue of great social importance.

As debate rages over the widening and destructive gap between the rich and the rest of Americans, Claude Fischer and his colleagues present a comprehensive new treatment of inequality in America. They challenge arguments that expanding inequality is the natural, perhaps necessary, accompaniment of economic growth. They refute the claims of the incendiary bestseller The Bell Curve (1994) through a clear, rigorous re-analysis of the very data its authors, Richard Herrnstein and Charles Murray, used to contend that inherited differences in intelligence explain inequality. Inequality by Design offers a powerful alternative explanation, stressing that economic fortune depends more on social circumstances than on IQ, which is itself a product of society. More critical yet, patterns of inequality must be explained by looking beyond the attributes of individuals to the structure of society. Social policies set the "rules of the game" within which individual abilities and efforts matter. And recent policies have, on the whole, widened the gap between the rich and the rest of Americans since the 1970s. Not only does the wealth of individuals' parents shape their chances for a good life, so do national policies ranging from labor laws to investments in education to tax deductions. The authors explore the ways that America--the most economically unequal society in the industrialized world--unevenly distributes rewards through regulation of the market, taxes, and government spending. It attacks the myth that inequality fosters economic growth, that reducing economic inequality requires enormous welfare expenditures, and that there is little we can do to alter the extent of inequality. It also attacks the injurious myth of innate racial inequality, presenting powerful evidence that racial differences in achievement are the consequences, not the causes, of social inequality. By refusing to blame inequality on an unchangeable human nature and an inexorable market--an excuse that leads to resignation and passivity--Inequality by Design shows how we can advance policies that widen opportunity for all.